Ammonia Wastewater Treatment: Wastewater Treatment Plant (WWTP) Centrate & Landfill Leachate

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Ammonia Splitter Treatment of Wastewater TreatmentPlant Centrate & Landfill Leachateprojects@saltworkstech.com

www.saltworkstech.comCopyright 2016 Saltworks Technologies Inc.

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The Project:Remove & destroy ammonia in Wastewater Treatment Plant (WWTP) Centrate circuit; beneficially increase capacity of WWTPOvercome challanges of biological processes through use of a direct controllable electrochemical processThe Ammonia Splitter Technology:Destroys ammonia, produces nitrogen gas (N2)Reliable, adjustable electrochemical treatmentExcess capacity: add more power to remove more NH3Compact modular systemFully automatedSolar photovoltaic direct power option

Copyright 2016 Saltworks Technologies Inc.

Ammonia Treatment and Technology

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Two options: destroy ammonia or make fertilizer Process OptionBy-productProsConsFull destructionElectrolyze to nitrogen gasN2 (air)Full destruction, no waste disposal liabilityHigher cost and energy. Solar PV offset option.Fertilizer productionConversion to (NH4)2SO4Ammonium Sulfate(NH4)2SO4Lowest cost optionLow value by-product (7% solution)High quality fertilizer productionConversion to NH4NO3Ammonium Nitrate(NH4)NO3High quality by-product, lower cost than full destructionProcess more complex.

Copyright 2016 Saltworks Technologies Inc.Ammonia Destruction OptionAmmonia Fertilizer By-Product Option

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Regenerator for Ammonia Destruction OptionCopyright 2016 Saltworks Technologies Inc.

Regenerator: Readily available off the shelf equipmentSolar photo-voltaics option to offset energy requirementsDC power used directly, no expensive inverters required

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Copyright 2016 Saltworks Technologies Inc.Wastewater Treatment Plant (WWTP)

Biological Aeration TanksSecondaryClarifiersPrimary ClarifiersAnaerobic DigestersSludgeDewatering

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Increased nutrient loads discharged to local water bodiesAlgae blooms damage aquatic ecosystems

Algae Bloom from WWTP Effluent Discharge

Copyright 2016 Saltworks Technologies Inc.

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No Action: Increased nutrient discharge exceed discharge limitsMore aeration tanks and secondary clarifiers footprint

WWTP: 3 options for increased nutrient loads

Aeration TanksSecondary ClarifiersCopyright 2016 Saltworks Technologies Inc.

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Option 3: Treat Side Stream (Centrate)Centrate recycle accounts for 1% WWTP flow, but 20% of ammonia loadTreat centrate to remove ammonia mass, and increase ammonia processing capacity

Copyright 2016 Saltworks Technologies Inc.

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WWTP Side Stream (Centrate) TreatmentSaltworks Ammonia Splitter to destroy NH3 to N2 gasLow foot print and fit into existing plant

Reduce Ammonia Loadin Main WWTPMeet EPA Discharge Limits Treating 1% of Inlet FlowCopyright 2016 Saltworks Technologies Inc.

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Built on Electrodialysis Reversal (EDR)Well established technology; 2nd most dominant membrane desalination system after reverse osmosis 50 years operational historyOrganic fouling resistant (no membrane water flux & pressure difference)Self cleaned through reversalEasy to service: plate and frameModular

Ammonia Splitter builds on EDRSpecial membranes insidePatented process

Copyright 2016 Saltworks Technologies Inc.

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Ductile and conductive base polymerpH 0-13, 0-60oC1/10th thickness of traditional membranes but tougher and smoother (less fouling potential)High multivalent ion transport, high selectivitySelective ion removal tuned for ammonia removalAdvanced Ion Exchange Membranes

Copyright 2016 Saltworks Technologies Inc.

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ElectroChem Commercial Production and Services

Customer Training Center

Quality Assurance

24/7 Remote Customer Support

ElectroChem Stack Production and AssemblyCONFIDENTIALCopyright 2015 Saltworks Technologies Inc.

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Testing on WWTP CentrateCentrate from Municipal WWTPPretreatment for TSS50 m microfiltration

WWTP Centrate50 m self cleaning filter for > 50 um solids

Copyright 2016 Saltworks Technologies Inc.

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Ammonia Splitter Micro Pilot Setup on CentrateFully automated DAQ: pH, stack voltage and currentManual checks: non-DAQ data, observations, confirm sensor calibrationAnalytical: internal bench top analysis and independent 3rd party analysisAmmonia Splitter Test Stack Pilot HMI

Micro Ammonia Splitter PilotCopyright 2016 Saltworks Technologies Inc.

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Centrate: Ammonia Splitter Micro Pilot Test ResultsReliable continuous 24/7 operation for 4000+ hrs (6 months)Removed ammonia in centrate from 1300 mg/L to 60 mg/LAutomated self cleaning and clean in place maintained reliable operationCopyright 2016 Saltworks Technologies Inc.1300 mg/L NH360 mg/L NH3

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Centrate: Ammonia Splitter Analytical Results95% of ammonia in centrate removedSome phosphate also removed ~10%Regenerator destroyed all of the ammonia to N2 gas100% recovery: to date, no waste by-product generated

Copyright 2016 Saltworks Technologies Inc.

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Copyright 2016 Saltworks Technologies Inc.

Ammonia Splitter Micro Pilot: Landfill Leachate Ammonia Splitter tested on landfill leachate for 3 monthsRemoved ammonia in leachate from 5280 mg/L to 772 mg/L, meeting the project requirements of reducing the ammonia load for further treatment by a downstream processPilot demonstrated that Ammonia Splitter can operate on any concentration of ammonia5300 mg/L770 mg/L

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Demonstrated reliable 24/7 operation for 6+ monthsReliable, automated, and no fouling (self cleaning systems function well)Removes ammonia from wastewaters at any concentration: centrate at 1300 mg/L and leachate at 5800 mg/L, to meet any treatment goal. All ammonia permanently destroyed to nitrogen gas100% recovery; no waste by product produced from testing to date

Copyright 2016 Saltworks Technologies Inc.

Conclusions

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Ammonia Splitter Treatment of Wastewater TreatmentPlant Centrate & Landfill Leachateprojects@saltworkstech.com

www.saltworkstech.comCopyright 2016 Saltworks Technologies Inc.

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