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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

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Membrane technologies for wastewater treatment w gilbert o neal ph d p e
Membrane Technologies for Wastewater TreatmentW. Gilbert O’Neal, Ph.D., P.E.


Membrane biological reactors mbr
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
ZeeWeedMBr

  • https://www.youtube.com/watch?v=d0bcPBjNz2g

  • https://www.youtube.com/watch?v=H_sqYYBUZB0

  • https://www.youtube.com/watch?v=2R9tmlaP5Rc


Zero liquid discharge zld
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
Application

  • Regulatory Restrictions

    • India

  • Resource Limitations

  • Discharge Limitations

  • Sustainability Goals


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








Reject water
Reject Water

71,600 gpd


Zld cost
ZLD Cost

  • 100,000 GPD System

  • Capital Cost: $2,000,000

  • Operating Cost: $16/1000 gal.


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