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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 https://www.youtube.com/watch?v=d0bcPBj Nz2g https://www.youtube.com/watch?v=d0bcPBj Nz2g https://www.youtube.com/watch?v=H_sqYYB UZB0 https://www.youtube.com/watch?v=H_sqYYB UZB0 https://www.youtube.com/watch?v=2R9tmla P5Rc https://www.youtube.com/watch?v=2R9tmla 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
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ZLD Mass Balance
Influent Characteristics 1.6 mgd
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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