Membrane Bioreactors (MBR)

An MBR is the combination of a membrane filtration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment.

MBR processes can produce effluent of suffcient quality to be discharged to waterways or to be reused for wash water or irrigation. Other advantages of MBRs over conventional processes include:

  • Their smaller footprint. It is possible to operate MBR processes at higher mixed liquor suspended solids (MLSS) concentrations compared to conventional settlement separation systems, thus reducing the reactor volume to achieve the same loading rate.
  • Due to the higher biomass concentrations (MLSS) and sludge ages, MBR’s are typically more stable than other activated sludge plants and are therefore better suited to treating highly variable loads.
  • It is relatively easy to retrofit and upgrade old wastewater treatment plants into MBR’s to achieve higher capacity and better quality effluent.

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