THE DEMON® ANAMMOX PROCESS: RESOURCE SAVINGS … · TOWARDS AN ENERGY NEUTRAL WWTP PRESENTED AT:...

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





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






DEMON BIOMASS AUGUST 2017 DEMON BIOMASS OCTOBER 2017

Agenda





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





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

[email protected]

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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