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Dr. Bernd Fitzke

Removing nitrogen safely, reliably and cost effectively. Dr. Bernd Fitzke. ENERGY & ENVIRONMENTAL TECHNOLOGY. Outline. Introduction of WEHRLE The impact of return liquor Return Liquor treatment Deammonification BIOMOX  case studies. Introduction of WEHRLE.

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Dr. Bernd Fitzke

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  1. Removing nitrogen safely, reliably and cost effectively Dr. Bernd Fitzke ENERGY & ENVIRONMENTAL TECHNOLOGY

  2. Outline • Introduction of WEHRLE • The impact of return liquor • Return Liquor treatment • Deammonification • BIOMOX case studies

  3. Introduction of WEHRLE WEHRLE Umwelt GmbH today: • More 30 years of experience in the wastewater business • 100 % subsidiary company of WEHRLE-WERK AG • 50 employees • Wastewater treatment for the industry and municipalities, treatment of leachate from landfills • Plants for mechanical- biological treatment of solid waste and organic matter (AD technology) • More than 300 references worldwide

  4. Outline • Introduction of WEHRLE • The impact of return liquor • Return liquor treatment • Deammonification • BIOMOX case studies

  5. The impact of return liquor Wastewater treatment plant

  6. The impact of return liquor Wastewater treatment plant – Nitrogen balance Wastewater treatment plant • <1% of WWTP inlet flow • 15-25% ofN-load • N-NH4: 500-1500 mg/L • BOD : < 150mg/L • Impact mainstream design • More O2required • Lower C/N ratio (C addition?) • Higher sludgeproduction

  7. The impact of return liquor Wastewater treatment plant – return liquor treatment Improvementby 18 % ! Improvementby 25 % ! energyandcostefficientsidestreamtreatment

  8. Outline • Introduction of WEHRLE • The impact of return liquor • Return liquor treatment • Deammonification • BIOMOX case studies

  9. Return liquor treatment Overview on the prime biological Processes for N-removal BIOMOX-SBR conventional Systems Q Nitritation Deni carbon O2 Q anammox Nitritation SHARON - DENI BIOMOX-CFR O2 carbon SBR Nitritationanammox SBR NitrificationDeni. O2 O2 Q Q

  10. Return liquor treatment comparison of the prime biological Processes for N-removal Numbers aboveareconsidering N-elimination only

  11. Outline • Introduction of WEHRLE • The impact of return liquor • Return liquor treatment • Deammonification • BIOMOX case studies

  12. Deammonification Process scheme of Deammonification + Anamox partial Nitritation N2 NH4-N NO2-N oxic anoxic NH4-N NO3-N NH4+ + 1,5 O2 NO2- + H2O + 2 H+ NH4+ + NO2- N2 + 2H2O AOB Planctomycetes

  13. Outline • Introduction of WEHRLE • The impact of return liquor • Return liquor treatment • Deammonification • BIOMOXcase studies

  14. BIOMOXCase studies BIOMOX-SBR Rheda Side: WWTP Rheda, Germany103,000 PE return liquor + rendering effluent Type: SBR Volume: 970 m³ Capacity: 312 m³/d 680 kg N / d N-Removal: 80 %

  15. BIOMOXCase studies BIOMOX-CFR Landshut Side: WWTP Landshut, Germany 260,000 PE return liquor Type: CFR, two step system with clarifiers Volume: 2 x 320 m³ Capacity: 240 m³/d340 kg N / d N-Removal: 75 %

  16. BIOMOXCase studies BIOMOX-CFR Potsdam Side: WWTP Potsdam-Nord, Germany 90,000 PE return liquor Type: CFR, two step system with clarifiers Volume: 2 x 200 m³ Capacity: 240 m³/d160 kg N / d N-Removal: 80 %

  17. BIOMOXCase studies BIOMOX-CFR Potsdam, plant layout controls room anoxicanammoxreactor clarifieranammox mashineryroom oxicnitritationreactor clarifiernitritation

  18. Dr.-Ing. Bernd Fitzke chief R&DTel: +49 (0)7641 585 355 fitzke@wehrle-umwelt.com WEHRLE Unit B Oakfield Industrial Estate Eynsham Oxfordshire OX29 4TH www.wehrle-env..co.uk

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