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

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Presentation transcript:

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 – Filamentous Bacteria

ZeeWeed MBr Nz2g Nz2g UZB0 UZB0 P5Rc P5Rc

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)

Application Regulatory Restrictions – India Resource Limitations Discharge Limitations Sustainability Goals

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

ZLD Schematic

RO System Detail

ZLD Mass Balance

Influent Characteristics 1.6 mgd

Biological Effluent

RO Permeate

Reject Water 71,600 gpd

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

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