Upgrading Conventional Systems for Waste Water Reuse (Aquatech 2013)

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Presented by Anand Krishnamurthy at Aquatech (India), 2013. In this presentation: …

Presented by Anand Krishnamurthy at Aquatech (India), 2013. In this presentation:
- Conventional systems vs. Membrane systems
- Need for Membrane based systems
- Upgrading Conventional systems

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  • 1. Upgrading ConventionalSystems for Waste Water Reuse Aquatech India, April 2013
  • 2. CONTENT• Conventional systems vs. Membrane systems• Need for Membrane based systems• Upgrading Conventional systems• Summary
  • 3. MEMBRANES vs. CONVENTIONALTECHNOLOGY Membrane Treatment Conventional Treatment
  • 4. MEMBRANES vs. CONVENTIONALTECHNOLOGY Membrane Treatment Conventional TreatmentModern and continuously Technology Developed in the 1800’simprovingExtremely compact Footprint Large land requirementPhysical barrier = reliable Gravity driven with coarse Separation Processfiltration filtrationFully automated with minimal Operation Labor and chemical intensivechemical use
  • 5. MEMBRANES vs. CONVENTIONALTECHNOLOGY Conventional AS Process ZeeWeed MBR Process Primary Clarifier Activated Activated Sludge Sludge Secondary Clarifier Sand Filter Sludge Digestion To Sludge Dewatering To Sludge Dewatering
  • 6. ADVANTAGES OF MEMBRANE BASED WASTEWATER SYSTEMS
  • 7. ADVANTAGES OF MEMBRANE BASEDWASTEWATER SYSTEMS• Removes majority of pathogenic organisms• Smaller footprint/layout• Consistently high product water quality: Not affected by the influent feed quality• Provides product water quality for unlimited reuse/recycling• Modular expandability (minimal additional cost for future expansion)• Operational simplicity with potential for Membrane Membrane Cassette Fiber remote monitoring• Lower post-disinfection demand in chlorine and UV Ideal technology for existing systems
  • 8. RETROFITTING MBR SYSTEMS IN EXISTINGPLANTS
  • 9. RETROFITTING MBR SYSTEMS IN EXISTINGPLANTS • Use of existing tanks for biological process volume & installation of membranes in existing tanks MBR retrofit into an • Use of existing tanks for biological process volume & installation of membranes into existing conventional new membrane tanks WWTP can be realized in several ways • A combination of existing and new tanks for use as biological and membrane process volume
  • 10. WHY IS MBR RETROFIT BENEFICIAL?
  • 11. WHY IS MBR RETROFIT BENEFICIAL?• MBR operates at MLSS of ~10,000 Parameter Value Unit Comments compared to CAS MLSS of ~3000, thus enhancing biological treatment capacity by > 3X BOD <5 mg/L Typically non- detectable• Membrane filtration post biological Typically non- TSS <1 mg/L detectable treatment provides superior quality effluent As a function of NH3-N < 0.5 mg/L biological process design • Increases usability of the effluent < 0.03 mg/L in reuse TP < 0.5 mg/L achievable As a function of • Increases saleability of the TN <3 mg/L biological effluent, especially for municipal process design operators < 0.2 NTU 95% Turbidity < 0.5 NTU of the time• Provides expandability for the future achievable
  • 12. CASE STUDY:DISTRICT COUNCIL OF ROTORUA, NZ CHALLENGE: • Need to comply with stricter environmental requirements for discharge SOLUTION: • GE supplied an MBR filtration system featuring its ZeeWeed* 500D ultrafiltration membranes • Project utilized an existing clarifier, installing UF membranes in the center • MBR retrofit enhanced the plant’s capacity to handle its growing wastewater treatment needs and meet the tighter discharge regulations without building additional, costly civil structures
  • 13. CASE STUDY:DISTRICT COUNCIL OF ROTORUA, NZ SUMMARY: • Advancement of Membrane Bioreactor technology over the past 30 years has resulted in significant reductions in capital and operating costs • MBR Design to retrofit existing, conventional plants has increasingly become an attractive option • Utilize existing assets to expand plant capacity • Greatly improve effluent quality • Minimize new construction • Combination of biological nutrient removal coupled with a membrane separation system maximizes the benefits of two advanced technologies
  • 14. GE’S MBR: LEADING WASTERWATERREUSE IN INDIA Segments Served “In India – for India” Team Municipal Range & Refinery Flexibility Food and Beverage Best in class Power Reuse Quality Automotive Tough Institutional Metals and Mining
  • 15. /GEIndiaConnect with us on /GEIndia /GEIndia