THE DEMON ANAMMOX PROCESS: RESOURCE SAVINGS THROUGH SIDE STREAM TREATMENT, AND THE STEPS
TOWARDS AN ENERGY NEUTRAL WWTPPRESENTED AT: NC AWWA-WEA 97TH ANNUAL CONFERENCE
PRESENTED ON: 13 NOVEMBER, 2017PRESENTED BY: CHANDLER JOHNSON
Co-Authors
Wish to thank the following people for their efforts in allowing this presentation to happen:
Bernhard Wett ARA Consult
Amanda Summers Pierce County / Chambers Creek WWTP
Agenda
Section I: DEMON / ANAMMOX TECHNOLOGY
Section II: PIERCE COUNTY WWTP
Section III: STRASS WWTP
Section IV: CONCLUSIONS
The DEMON / Anammox -Process
Reduce the Recycling of Nitrogen from Anaerobic Digestion
Influent Primary ClarifierAerobic SRT 15 D
Secondary Clarifier Tertiary
Anaerobic Digester Dewatering
DEMON / ANAMMOX TREATMENT
Primary Clarifier
Aerobic SRT 15 D
Secondary Clarifier Tertiary
Anaerobic Digester Dewatering
Represents up to 40% TN Load to Plant
Anaerobic sludge digestion is very beneficial; However, recycling of high ammonia stream has many bad effects:
Reduction in C/N ratio which minimizes denitrification potential thus requiring external carbon for meeting effluent Nitrogen limits
Shock loads to system due to infrequent dewatering Alkalinity sometimes insufficient for complete nitrification
1 process cycle of the DEMON involves multiple time-controlled phases: Aeration phase (Nitritation) Settling phase Mix phase (Deammonification) Discharge phase Fill & Mix Phase (NH3-N Addition)
DEMON 1.0 - Anammox Treatment SBR Mode
Aeration phase Fill / Mix phase
Settling phase Discharge phase
NOB waste biomass
Influent flow
Anammoxreturn Treated
Effluent flow
EQ Tank
DEMON Tank
SettlingZone
Messner Aeration Panels
Side Mounted Mixer
Elevated Influent Pump
Micro-screen
Flow to settling zone
Micro-screenPump
DEMON 2.0 - Anammox Treatment Continuous Mode
Process Benefits Higher Loading Rates Lower installed Feed pump HP Smaller EQ Tank Volume Lower installed Blower HP Higher Anammox Retainment
Fundamentals of Nitrification Denitrification
75% O2100% Alkalinity
Oxygen demand 4.57 g / g NH+4-N oxidizedCarbon demand 4.77 g COD / g NO-3-N reduced
1 mol Ammonia(NH3/ NH4 +)
1 mol Nitrite(NO2- )
1 mol Nitrate(NO3- )
Autotrophic Nitrification Aerobic Environment
1 mol Nitrite(NO2- )
mol Nitrogen Gas(N2 )
25% O2
40% Carbon
60% Carbon
Heterotrophic DenitrificationAnoxic Environment
1.8 2.7 kW hr / lb N4 6 kW hr / kg N
Fundamentals of Deammonification
Oxygen demand 1.9 g / g NH+4-N oxidized
0.44 mol N2+ 0.11 NO3-1 mol Ammonia(NH3/ NH4 +)
NH4+ + 1.32 NO2- + 0.066 HCO3- + 0.13 H+
0.26 NO3- + 1.02N2 + 0.066 CH2O0.5N0.15 + 2.03 H2O
0.57 mol NO2-
Aerobic Ammonium OxidationAerAOB
Anaerobic Ammonium OxidationAnammox or AnAOB
Partial Nitritation 40% O250% Alkalinity
> 60% reduction in Oxygen
Eliminate demand for supplemental carbon
50% of the alkalinity demand
0.45 0.79 kW hr / lb N1 1.75 kW hr / kg N
Comparison of Consumables
Conventional
Chart1
KonventionellKonventionellKonventionell
DEMON+DEMON+DEMON+
energy
methanol
sludge
100
100
100
50
0
5
Tabelle1
energymethanolsludge
Konventionell100100100
DEMON+5005
Ziehen Sie zum ndern der Gre des Diagrammdatenbereichs die untere rechte Ecke des Bereichs.
Methanol
O2
O2 50%
Nitrogen Cycle
Demon Projects for North AmericaYork River, VA Operational - 2012 554 lb/dayBiogas plant, FL Operational - 2013 1,500 lb/dayAlexandria, VA Operational - 2015 2,826 lb/dayCity of Greeley, CO Operational - 2015 781 lb/dayCity of Guelph, Ontario Operational - 2015 921 lb/dayPierce County, WA Operational - 2017 4,147 lb/dayDC Water, DC Operational - 2017 27,338 lb/day
Demon - DC Water
Demon - Pierce County
Agenda
Section I: DEMON / ANAMMOX TECHNOLOGY
Section II: PIERCE COUNTY WWTP
Section III: STRASS WWTP
Section IV: CONCLUSIONS
Pierce County DEMON Process Flowchart
EffluentTank
EQ Basin
Centrifuge/Dewatering
Feed Pump
Blowers
Enrichment Cyclone
Wastevalve
Recyclevalve
Decanter
DecantingValve
Enrichment Cyclonepump
MixerMixer
Discharge Cyclone
Wastevalve
Recyclevalve
Pierce County Demon ReactorsAvailable set points Aeration and Fill Phase
Fill time and flowrate Blower speed and time
Aeration Phase Blower speed & time
Mix/Fill Phase Mixer speed & time Fill time and flowrate
Fill Phase Flowrate and time
Enrichment Hydrocyclones Recycle & wasting time
Settling Time
Decant Decant mode decanter/cyclone Time
SBR1: 256,000 galSBR2: 253,700 galHi operational level 21 ftLow operational level 18 ft
PIERCE COUNTY START UP DATA
PIERCE COUNTY START UP DATA
PIERCE COUNTY START UP DATA
PIERCE COUNTY START UP DATA
PIERCE COUNTY START UP DATA
PIERCE COUNTY START UP DATA
DEMON BIOMASS AUGUST 2017 DEMON BIOMASS OCTOBER 2017
Agenda
Section I: DEMON / ANAMMOX TECHNOLOGY
Section II: PIERCE COUNTY WWTP
Section III: STRASS WWTP
Section IV: CONCLUSIONS
WWTP Strass, Austria
10 MGD Winter, 5 MGD Summer Mainstream treatment by an A+B process Net energy positive plant since 2005 DEMON Mainstream & Side stream
-1 4
68 2
60
-1 4
60 1
00
-1 2
82 2
00
-1 2
26 2
80
-1 1
45 6
40
-1 0
27 0
60
-1 0
39 3
80
-883
396
-803
160
-614
944
-594
371
-541
192
-208
740
+236
465
+150
982
+267
226
+656
782
+1 2
11 1
11
+1 6
92 8
80
+1 5
42 6
17
+1 6
41 7
11
-2 000 000
-1 000 000
000
1 000 000
2 000 000
3 000 000
4 000 00019
92
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
total consumption WWTP (kWh/a) electricity balance (kWh/a)
WWTP Strauss Energy Balance
Wett et al., 2014
New CHP
DEMON
Co-Digestion +
New CHP
18% Flow Increase
Hydro-Cyclones Select Granules to De-Couple SRT of MLSS
Bioaugmentation of Mainstream with AOBs
Bioaugmentation of Mainstream with Anammox
Micro-Screen
Micro-Screen
Strass Resource Requirements of sidestream deammonification
screen installation
diffuser repair
Strass N-removal efficiencyof sidestream deammonification
screen installation
Strass Bioaugmentation to Mainstream WWTP
Strass Screen Performance in Retainment of Anammox
25C
ConventionalN-removal
A+B & DEMONin sidestream, mainstream
Aeration+39.3 Wh /pe d
Aeration+16.4 Wh /pe d
Total +56.5 Wh /pe d
Total +33.3 Wh /pe d
Gas el. -42.0 Wh /pe d
Gas el. -64.7 Wh /pe d
Balance +14.5 Wh /pe d
Balance -31.4 Wh /pe d
A major step towards an energy self-sufficient WWTP
Agenda
Section I: DEMON / ANAMMOX TECHNOLOGY
Section II: PIERCE COUNTY WWTP
Section III: STRASS WWTP
Section IV: CONCLUSIONS
CONCLUSIONS
Sidestream treatment using the DEMON / Anammox treatment system is the most cost effective biological treatment solution.
Seven systems now operational in North America with first system now treating filtrate from Cambi THP + Mesophilic digestion.
Start up of the Pierce County DEMON system has gone from 200 lb/day up to over 1,300 lb/day in less than 3 months.
Strass WWTP in Austria using the A+B concept with both sidestream and mainstream deammonification with aeration control produces 25% more power than uses and is using less and less energy.
Thank you!!!
ANY QUESTIONS????
CHANDLER JOHNSON617-899-1566
The DEMON Anammox Process: Resource Savings Through Side Stream Treatment, and the Steps Towards an Energy Neutral WWTPPRESENTED AT: NC AWWA-WEA 97TH ANNUAL CONFERENCEPRESENTED ON: 13 November, 2017PRESENTED BY: CHANDLER JOHNSONCo-AuthorsAgendaThe DEMON / Anammox -ProcessReduce the Recycling of Nitrogen from Anaerobic DigestionSlide Number 6Slide Number 7Fundamentals of Nitrification DenitrificationFundamentals of DeammonificationComparison of ConsumablesSlide Number 11Slide Number 12Slide Number 13Slide Number 14AgendaSlide Number 16Pierce County Demon Reactors PIERCE COUNTY START UP DATA PIERCE COUNTY START UP DATA PIERCE COUNTY START UP DATA PIERCE COUNTY START UP DATA PIERCE COUNTY START UP DATA PIERCE COUNTY START UP DATAAgendaSlide Number 25WWTP Strass, AustriaWWTP Strauss Energy BalanceHydro-Cyclones Select Granules to De-Couple SRT of MLSSStrass Resource Requirements of sidestream deammonificationStrass N-removal efficiencyof sidestream deammonificationStrass Bioaugmentation to Mainstream WWTPStrass Screen Performance in Retainment of AnammoxA major step towards an energy self-sufficient WWTPAgenda CONCLUSIONSSlide Number 36
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