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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 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
slide11

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.