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Membrane Technologies for Wastewater Treatment W. Gilbert O’Neal, Ph.D., P.E.

Membrane Technologies for Wastewater Treatment W. Gilbert O’Neal, Ph.D., P.E. Membrane Biological Reactors ( MBr ). Membrane Filtration of Activated Sludge Mixed Liquor Eliminates clarifiers Removes solids and turbidity from effluent Reduced footprint Tolerates High SRT, MLSS

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Membrane Technologies for Wastewater Treatment W. Gilbert O’Neal, Ph.D., P.E.

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  1. Membrane Technologies for Wastewater TreatmentW. Gilbert O’Neal, Ph.D., P.E.

  2. Membrane Biological Reactors (MBr) • Membrane Filtration of Activated Sludge Mixed Liquor • Eliminates clarifiers • Removes solids and turbidity from effluent • Reduced footprint • Tolerates • High SRT, MLSS • Filamentous Bacteria

  3. ZeeWeedMBr • https://www.youtube.com/watch?v=d0bcPBjNz2g • https://www.youtube.com/watch?v=H_sqYYBUZB0 • https://www.youtube.com/watch?v=2R9tmlaP5Rc

  4. Zero Liquid Discharge (ZLD) • Water Reuse (90-95%) • “Dry” Residual Disposal • System Components • Biological Treatment • Chemical Treatment • Macro Filtration • Membrane Filtration (UF and RO) • Evaporation (MEE)

  5. Application • Regulatory Restrictions • India • Resource Limitations • Discharge Limitations • Sustainability Goals

  6. ZLD PLANT FLOW DIAGRAM Influent Pump Equalization Filter Heat Exchanger Cooling Tower Secondary Clarifier UF Biological Oxidation Quartz Filter Permeate to process – 93% 3- stage RO Sludge Thickener De-carbonator Filter Press Softener Resin Filter Reject - 7% Sludge storage Solar Pond MEE Air Evaporator

  7. ZLD Schematic

  8. RO System Detail

  9. ZLD Mass Balance

  10. Influent Characteristics 1.6 mgd

  11. Biological Effluent

  12. RO Permeate

  13. Reject Water 71,600 gpd

  14. ZLD Cost • 100,000 GPD System • Capital Cost: $2,000,000 • Operating Cost: $16/1000 gal.

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