Processing of liquid foods using UV Taylor-Couette flow reactor
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Transcript of Processing of liquid foods using UV Taylor-Couette flow reactor
Performance characterization of Taylor-Couette Flow UV Reactor
(TCFR) for liquid foods
VISHWESH KELKAR
TATIANA KOUTCHMA
BRIAN PARISINATIONAL CENTER FOR FOOD SAFETY amp TECHNOLOGY
ILLINOIS INSTITUTE OF TECHNOLOGYCHICAGO
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid
foods
bull What is a Liquid Food
a Definition b Types of liquid foods 1 Newtonian fluids
2 Non-Newtonian fluids
bull Food Safety a Center for Disease Control (CDC)
b US Food and Drug Administration 21 CFR 120
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ultraviolet Irradiation
a Definition ndash Waves which range between wavelengths of 200 to 400nm and can be further divided into UVA (320-400 nm) UVB (280-320 nm) and UVC (200-280 nm) are called Ultraviolet (UV) radiation
b Working Mechanism ndash - DNA of cell of a sequence of four constituent bases known as purines and
pyrimidines linked together in a double- stranded helix - When UVC radiation is absorbed by the pyrimidine bases it permits a unique
photochemical reaction which leads to dimerization of adjacent pyrimidines - Disruption in the structure of the DNA makes it unable to replicate and hence results in inactivation of microbial cell Eλ radiant energy at a given wavelength λw kJEinstein C speed of light 3times108 ms h Plancks constant 6626times10-34 Js Av Avogadros number 6023times1023 photonsEinstein
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Taylor Couette Flow
Flow of fluid in the gap between two infinitely long concentric cylinders on or both of which are rotating along their common axis is called as Taylor-Couette flow
GITaylor found that a parameter known as Taylor number rises above a threshold value of 1708 and the gap between the cylinders is much smaller than radii the flow is unstable
The streamlines of low Taylor number Taylor-Couette flow are circular Following figure is a flow from a radial viewpoint
Once the flow becomes unstable it is dominated by large toroidal vortices stacked one on top of the other called Taylor vortices
Taylor Number is given by
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Taylor-Couette Flow Reactor (TCFR) -- Arrangement consists of two concentric cylinders with inner rotating called
rotor and outer stationary as stator
-- Liquid flows through the annulus of rotor and stator with UV lamps arranged around the stator
-- Flow in the Taylor Couette flow
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid
foods
bull What is a Liquid Food
a Definition b Types of liquid foods 1 Newtonian fluids
2 Non-Newtonian fluids
bull Food Safety a Center for Disease Control (CDC)
b US Food and Drug Administration 21 CFR 120
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ultraviolet Irradiation
a Definition ndash Waves which range between wavelengths of 200 to 400nm and can be further divided into UVA (320-400 nm) UVB (280-320 nm) and UVC (200-280 nm) are called Ultraviolet (UV) radiation
b Working Mechanism ndash - DNA of cell of a sequence of four constituent bases known as purines and
pyrimidines linked together in a double- stranded helix - When UVC radiation is absorbed by the pyrimidine bases it permits a unique
photochemical reaction which leads to dimerization of adjacent pyrimidines - Disruption in the structure of the DNA makes it unable to replicate and hence results in inactivation of microbial cell Eλ radiant energy at a given wavelength λw kJEinstein C speed of light 3times108 ms h Plancks constant 6626times10-34 Js Av Avogadros number 6023times1023 photonsEinstein
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Taylor Couette Flow
Flow of fluid in the gap between two infinitely long concentric cylinders on or both of which are rotating along their common axis is called as Taylor-Couette flow
GITaylor found that a parameter known as Taylor number rises above a threshold value of 1708 and the gap between the cylinders is much smaller than radii the flow is unstable
The streamlines of low Taylor number Taylor-Couette flow are circular Following figure is a flow from a radial viewpoint
Once the flow becomes unstable it is dominated by large toroidal vortices stacked one on top of the other called Taylor vortices
Taylor Number is given by
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Taylor-Couette Flow Reactor (TCFR) -- Arrangement consists of two concentric cylinders with inner rotating called
rotor and outer stationary as stator
-- Liquid flows through the annulus of rotor and stator with UV lamps arranged around the stator
-- Flow in the Taylor Couette flow
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ultraviolet Irradiation
a Definition ndash Waves which range between wavelengths of 200 to 400nm and can be further divided into UVA (320-400 nm) UVB (280-320 nm) and UVC (200-280 nm) are called Ultraviolet (UV) radiation
b Working Mechanism ndash - DNA of cell of a sequence of four constituent bases known as purines and
pyrimidines linked together in a double- stranded helix - When UVC radiation is absorbed by the pyrimidine bases it permits a unique
photochemical reaction which leads to dimerization of adjacent pyrimidines - Disruption in the structure of the DNA makes it unable to replicate and hence results in inactivation of microbial cell Eλ radiant energy at a given wavelength λw kJEinstein C speed of light 3times108 ms h Plancks constant 6626times10-34 Js Av Avogadros number 6023times1023 photonsEinstein
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Taylor Couette Flow
Flow of fluid in the gap between two infinitely long concentric cylinders on or both of which are rotating along their common axis is called as Taylor-Couette flow
GITaylor found that a parameter known as Taylor number rises above a threshold value of 1708 and the gap between the cylinders is much smaller than radii the flow is unstable
The streamlines of low Taylor number Taylor-Couette flow are circular Following figure is a flow from a radial viewpoint
Once the flow becomes unstable it is dominated by large toroidal vortices stacked one on top of the other called Taylor vortices
Taylor Number is given by
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Taylor-Couette Flow Reactor (TCFR) -- Arrangement consists of two concentric cylinders with inner rotating called
rotor and outer stationary as stator
-- Liquid flows through the annulus of rotor and stator with UV lamps arranged around the stator
-- Flow in the Taylor Couette flow
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Taylor Couette Flow
Flow of fluid in the gap between two infinitely long concentric cylinders on or both of which are rotating along their common axis is called as Taylor-Couette flow
GITaylor found that a parameter known as Taylor number rises above a threshold value of 1708 and the gap between the cylinders is much smaller than radii the flow is unstable
The streamlines of low Taylor number Taylor-Couette flow are circular Following figure is a flow from a radial viewpoint
Once the flow becomes unstable it is dominated by large toroidal vortices stacked one on top of the other called Taylor vortices
Taylor Number is given by
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Taylor-Couette Flow Reactor (TCFR) -- Arrangement consists of two concentric cylinders with inner rotating called
rotor and outer stationary as stator
-- Liquid flows through the annulus of rotor and stator with UV lamps arranged around the stator
-- Flow in the Taylor Couette flow
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Taylor-Couette Flow Reactor (TCFR) -- Arrangement consists of two concentric cylinders with inner rotating called
rotor and outer stationary as stator
-- Liquid flows through the annulus of rotor and stator with UV lamps arranged around the stator
-- Flow in the Taylor Couette flow
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimental Set-up
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Experimentation
Following goals were defined for carrying ut performance characterization of the reactor
1 Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as against wavy surface rotor in Taylor-Couette laminar flow for test fluids
a) Tap water b) Food grade viscous liquid
2 Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for water as a test
liquid
Part [A]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameter Liquid to be treated ndash Tap waterVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Rpm angular frequency of rotor(iii)Flow rate though annulus between rotor and stator
Injection dye used Food grade caramel liquid
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Standard Curve for calculation of caramel
Dye concentration
Std Dye Sample -
Abs A Conc Sample
1375 1695 1
032 04255 2
0078 01064 3
0019 00266 4
Std Curve y = 12251x + 00145
R2 = 09997
0
02
04
06
08
1
12
14
16
18
0 05 1 15
Absorbance A
D
ye C
onc
Series1
Linear (Series1)
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A]
Results - Smooth Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm70057005plusmnplusmn
010160586058plusmn0plusmn0
1157975797plusmnplusmn
0101
006 lpm006 lpm54495449plusmnplusmn
020251315131plusmn0plusmn0
151551075107plusmnplusmn
0505
008 lpm008 lpm5088+5088+
01401450105010plusmn0plusmn0
1149904990plusmnplusmn
0101
RPMRPM 100100 150150 200200
Taylor Taylor nono
2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular FrequencFrequenc
y Ωy Ω
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A]Results - Smooth Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Smooth Rotor
0000
0500
1000
1500
2000
00 500 1000 1500 2000 2500 3000
Time Sec
D
ye C
on
c
100 RPM
150 RPM
200 RPM
RTD 006 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
3000
00 1000 2000 3000Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
RTD 008 lpm - Smooth Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye
Co
nc
100 RPM
150 RPM
200 RPM
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A]
Results - Wavy Surface Rotor
RPMRPM
Flow rateFlow rate100100 150150 200200
004 lpm004 lpm61436143plusmnplusmn
0101
63556355plusmnplusmn
016016
69726972plusmnplusmn0101
006 lpm006 lpm55025502plusmnplusmn
010155215521plusmnplusmn
020255905590plusmnplusmn
0101
008 lpm008 lpm47594759plusmnplusmn
00500547674767plusmnplusmn
020248914891plusmnplusmn
0202
RPMRPM 100100 150150 200200
Taylor noTaylor no 2654726547 3982039820 5309353093
Gap Gap width d width d metermeter
00025 00025 0002500025 0002500025
Angular Angular Frequency Frequency
ΩΩ
RpsRps
1046710467 157157 2093420934
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A] Results - Wavy Surface Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
RTD 004 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD 006 lpm - Wavy Rotor
0000
0500
1000
1500
2000
2500
00 1000 2000 3000
Time Sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
RTD for 008 lpm - Wavy Rotor
-0200
0300
0800
1300
1800
2300
2800
00 500 1000 1500 2000 2500 3000Time sec
D
ye C
on
c
100 Rpm
150 Rpm
200 Rpm
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Angular Frequency
Rpm
Time SecFlow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 7005 5449 5088150 6058 5131 5010200 5797 5107 4990
Ang frequency vs Residence time - Smooth Rotor
40
45
50
55
60
65
70
75
80 90 100 110 120 130 140 150 160 170 180 190 200 210
Angular frequency Rpm
Tim
e s
ec
004litmin
006litmin
008litmin
Flow rate vs Residence Time - Smooth Rotor
40
45
50
55
60
65
70
75
0035 0045 0055 0065 0075 0085
Flow rate Lpm
Tim
e S
ec
100RPM
150RPM
200RPM
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Part [A] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Ang Frequency vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
90 100
110
120
130
140
150
160
170
180
190
200
210
Angular Frequency Rpm
Re
sid
en
ce
Tim
e S
ec
004lpm
006lpm
008lpm
Flow rate Vs Residence Time - Wavy Rotor
4300
4800
5300
5800
6300
6800
7300
003 004 005 006 007 008 009
Flow rate lpm
Re
sid
en
ce
Tim
e
Se
c
100Rpm
150Rpm
200Rpm
Angular Frequency
Rpm
Time Sec
Flow rate Flow rate Flow rate
004 lpm 006 lpm 008 lpm
100 6143 5502 5502
150 6355 5521 4767
200 6973 5590 4891
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 1 Comparison of momentum transfer achieved using smooth surface rotor as
against wavy surface rotor in Taylor-Couette laminar flow for food grade
liquid as a test liquid
Part [B]
To compare residence time and residence time distribution between smooth surface and wavy surface rotors
Constant parameters Liquid to be treated ndash Food grade viscous liquid Flow rate of 025 liter per min Angular frequency of 200 rpmVariable parameters following changing one at a time ndash (i) Shape of rotor ie smooth rotor and wavy surface rotor(ii) Viscosity of the liquid
Injection dye used Food grade caramel liquid
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Smooth Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B] ndash Wavy Rotor
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Part [B]
ViscositycP
Residence Time Sec
Wavy Smooth
4320 5872 4997
6320 8070 7093
8140 9549 8932
10660 12383 11536
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [A]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Food grade viscous liquid
absorbance of the viscous liquid to be treated
angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and statoriii Viscosity
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Experimentation on processing of non-Newtonian and Newtonian liquid with the variations in the rotor type arrangement in the TCFR
Part [B]
Non-Newtonian (viscous) semi-transparent liquid model will be inoculated with E coli K 12
Constant parameters Liquid to be tested Tap water absorbance of the viscous liquid to be
treated angular frequencyVariable parameters Changing one at a time
i Shape of the rotor ie smoothwavy rotorii Flow rate through annulusgap between rotor and stator
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Goal 2 Following results were obtained based on the experimentation
Microbial inactivation data using smooth and wavy surface rotors
Test Fluid RotorAngular
Frequency RpmFlow rate litermin
Complete Inactivation
YesNo
Viscous liquid 816 cP
Wavy 100 025 Yes
Viscous liquid 816 cP
Wavy 200 025 Yes
Viscous liquid 816 cP
Smooth 100 025 Yes
Viscous liquid 816 cP
Smooth 200 025 Yes
Viscous liquid 444 cP
Wavy 200 025 Yes
Viscous liquid 444 cP
Smooth 200 025 Yes
Tap Water Wavy 200 004 Yes
Tap Water Smooth 100 004 Yes
Tap Water Wavy 200 008 Yes
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Comparison of momentum transfer achieved using smooth surface
rotor as against wavy surface rotor in Taylor-Couette laminar flow
bull When tap water was used as test fluid for the smooth surface rotor maximum residence time of 7005 sec was achieved at the flow rate of 004 liter per minute and 100 rpm angular frequency of rotor where as when wavy surface rotor was used the maximum residence time of 6973 sec was achieved at the flow rate of 004 liter per minute and 200 rpm angular frequency of the rotor
bull Also when the fluid was passed through the reactor with wavy rotor having no angular frequency the residence time achieved was 120 sec But the reactor did not get washed off completely from the dye
bull Taylor number achieved using Taylor-Couette flow reactor was 18771 which was low than the critical value of 1708 Hence the flow the achieved was laminar Taylor Couette flow
bull When viscous liquid was tested for the residence time of the dye it was found that the residence time increased with increasing syrup viscosities Wavy rotor gave maximum residence time of 12383 sec compared to smooth surface rotor of 11536 second
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
bull Conclusions -- Experimentation on processing of non-Newtonian liquids with the
variations in the rotor type arrangement
bull Complete inactivation of Ecoli K12 was achieved in viscous liquid of 816 cP and 444 cP viscosities using smooth as well as wavy surface rotor at 025 liter per minute flow rate
bull When tap water was used as a test fluid complete inactivation of Ecoli K12 was achieved using smooth and wavy surface rotors at 004 liter per minute and 008 liter per minute flow rate
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501
Performance characterization of Taylor-Couette Flow UV Reactor (TCFR) for liquid foods
Bibliography
lsquoJuice Irradiation with Taylor-Couette FlowUV Inactivation of E colirsquo LJForneya J A Piersonb and Z Yea a-School of Chemical and Bimolecular Engineering Georgia Institute of Technology AtlantaGA 30332 b- Electro-Optics Environment and Materials Laboratory-Food Processing Technology Division Georgia Tech Research Institute Atlanta GA 30332
lsquoBiodosimetry of Escherichia coli Inactivation in Model Juices with regard to dose distribution in Annular UV reactorsrsquo T Koutchma and B Parisi
lsquoUV Disinfection Between Concentric Cylindersrsquo Zhengcai Ye School of Chemical and Bimolecular Engineering Georgia Institute of Technology May 2007
lsquoInactivation efficiency of UV treatment of juicesrsquo T Koutchma1 C Adhikari1 and E G Murakami2 (1) National Center for Food Safety and Technology Illinois Institute of Technology 6502 S Archer Road Moffett Campus Summit-Argo IL 60501 (2) National Center for Food Safety and Technology FDA 6502 S Archer Road Summit-Argo IL 60501