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Optimisation of Design & Technology for Sewage Treatment

National Conference on Energy & Environment. Optimisation of Design & Technology for Sewage Treatment. by Vinita Dhupkar 21 st February, 2014. Contents. Water Stress Sewage Generation & Treatment Sewage Treatment – Technology Options Overview of Technologies

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Optimisation of Design & Technology for Sewage Treatment

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  1. National Conference on Energy & Environment Optimisation of Design & Technology for Sewage Treatment by Vinita Dhupkar 21st February, 2014

  2. Contents • Water Stress • Sewage Generation & Treatment • Sewage Treatment – Technology Options • Overview of Technologies • Technology Comparison & Assessment • Technology Selection • Way Forward

  3. Global Water withdrawal

  4. Water Stress Yesterday : Water Pollution • Today : Water Stress Tomorrow : Water Scarcity

  5. Water Stress • Growing Population • Increasing Urbanisation • Insufficient Infrastructure • Over Extraction of Ground water • Poor Treatment & Maintenance • Increasing Gap between Demand & Supply

  6. Sewage Generation & Treatment Ref : CPCB Report on Performance Evaluation of STPs, 2013

  7. Sewage generation & Treatment Metropolitan Cities Class II Cities Class I Cities Ref : CPCB Report on Performance Evaluation of STPs, 2013

  8. Sewage generation & Treatment

  9. STP – Technology Options Option 1 : ACTIVATED SLUDGE PROCESS (ASP/ EA) Option 2 : MOVING BED BIO REACTOR (MBBR) / FIXED AERATED BIOREACTOR (FAB) Option 3 : SEQUENTIAL BATCH REACTOR (SBR) Option 4 : MEMBRANE BIO REACTOR (MBR) Option 5 : UPFLOW ANAEROBIC SLUDGE BLANKET (UASB) REACTOR Option 6 : TRICKING FILTER (TF)

  10. ASP- Flow Diagram AT-SC-CHL SCREENING RAW SEWAGE GRIT INLET CHAMBER GRIT REMOVAL RAW SEWAGE PUMPING STATION CHLORINE TREATED WATER DISINFECTION AERATION TANK SECONDARY CLARIFIER SLUDGE DRYING BEDS FILTRATE TO AERATION TANK

  11. ASP - Flow Diagram PC-AT-SC-CHL RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER PRIMARY CLARIFIER GRIT REMOVAL CHLORINE TREATED WATER DISINFECTION AERATION TANK SECONDARY CLARIFIER SLUDGE THICKNER SLUDGE DRYING BEDS FILTRATE TO AT SLUDGE STABILISATION

  12. ASP

  13. ASP

  14. MBBR - Flow Diagram MBBR-SC-CHL RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER GRIT REMOVAL CHLORINE TREATED WATER DISINFECTION AERATION TANK (MBBR) SECONDARY CLARIFIER SLUDGE DRYING BEDS FILTRATE TO AERATION TANK

  15. MBBR

  16. FAB - Flow Diagram FAB-SC-CHL RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER GRIT REMOVAL CHLORINE TREATED WATER DISINFECTION AERATION TANK (FAB) SECONDARY CLARIFIER SLUDGE DRYING BEDS FILTRATE TO AERATION TANK

  17. SBR - Flow Diagram DECANTER DIFFUSERS SBR-CHL RAW SEWAGE SCREENING GRIT SBR - 1 INLET CHAMBER GRIT REMOVAL BLOWER SBR - 2 BLOWER RETURN SLUDGE SURPLUS SLUDGE CHLORINE SLUDGE TREATED WATER TO DIPSOSAL PUMP SLUDGE SUMP CHLORINE CONTACT TANK CENTRIFUGE (SLUDGE DEWATERING)

  18. SBR SBR

  19. SBR

  20. MBR- Flow Diagram MBR-CHL RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER GRIT REMOVAL CHLORINE TREATED WATER DISINFECTION MBR TANK SLUDGE DRYING BEDS FILTRATE TO AERATION TANK

  21. MBR MBR

  22. UASB - Flow Diagram UASB-AT-SC-CHL ELECTRICITY RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER GRIT REMOVAL GAS ENGINE UASB CHLORINE TREATED WATER DISINFECTION GAS HOLDER AERATION TANK / FACULTATIVE LAGOON SECONDARY CLARIFIER SLUDGE THICKNER SLUDGE DRYING BEDS FILTRATE TO AT

  23. UASB

  24. TRICKLING FILTER - Flow Diagram TF-AT-SC-CHL RAW SEWAGE SCREENING GRIT RAW SEWAGE INLET CHAMBER GRIT REMOVAL TRICKLING FILTER CHLORINE TREATED WATER DISINFECTION AERATION TANK SECONDARY CLARIFIER SLUDGE THICKNER SLUDGE DRYING BEDS FILTRATE TO AT

  25. Trickling Filter

  26. Technology Comparison

  27. Technology Comparison

  28. Technology Comparison

  29. Technology Comparison Treated Sewage Parameters

  30. Domestic WW Treatment Recycle Reuse SBR MBR Objective 4 Reduce Operation Cost UASB SBR Objective 3 Reduce Space SBR MBR MBBR Objective 2 Reduce Capital Cost UASB ASP MBBR Objective 1 TECHNOLOGY SELECTION

  31. Indian Scenario Technology Options UP, Delhi Treatment & energy production Domestic Wastewater Technologies Chennai Kerala Maharashtra Gujarat AP, Karnataka Treatment & Reuse Treatment & Recycle / Reuse (Desalination)

  32. Way Forward • Recycle / Reuse • Techno-economically viable technologies • Improvement in O&M • Reduction in Operational Cost by Innovations • Stringent Policies & Implementation by Govt. • Promotion of PPP Models

  33. Yesterday : Water Pollution Water Stress • Today : Water Stress Tomorrow : Water Scarcity Day After Tomorrow : Water War

  34. Thank You ! Do not let the well dry, to learn the worth of Water ! Vinita Dhupkar

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