aerobic mbr

Conventional technologies have clear limitations in the treatment of wastewater with high concentrations of FOG (Fats, Oils and Greases) and high levels of COD (Chemical Oxygen Demand) or solids.

Especially the variation in wastewater strength and composition has traditionally been a major cause of unstable systems, whether the processes were physical, chemical, or biological in nature.

The aerobic membrane bioreactor (MBR) does a remarkably good job in producing clean and directly reusable water, even if close monitoring has to be taken for granted in most older systems. 

The aerobic MBR uses biological treatment with microorganisms that flourish in the presence of oxygen. The aerobic reactor is a basin in which bacteria feed and multiply on the nutrients in the wastewater. Blowers aerate the basin continuously to provide enough oxygen. 

Once there has been sufficient time for the bacteria to degrade the pollutants, ultrafiltration (UF) membranes separate the water from the waste stream to produce a high-quality effluent. The power of the MBR is in the combination of biological degradation and membrane separation. 

Aerobic MBR systems built and delivered by Pentair are characterized by a high degree of stability and effectiveness. They are the result of many years of research and practical experience. To prevent sludge problems and destabilization, the two main processes are physically separated by placing the membranes outside the bioreactor. This allows for the optimization of both individual processes, which remain highly attuned to each other. The membrane section is typically fully automated to keep performance steady at all times. 

If you have any questions, please contact us.

Typical applications

  • Highly concentrated streams: COD 5,000 - 250,000 ppm 
  • Waste streams in the beverage industry, notably breweries
  • Waste streams high in FOG from the food and dairy industries
  • Starch slurries


  • Smaller footprint compared to conventional techniques with pre- and post-treatment
  • Low energy and chemicals consumption 
  • Easy maintenance and low cleaning frequency
  • Simple and reliable process to meet all discharge requirements
  • Consistent high-quality effluent through almost total removal of solids
  • Permeate suitable for direct reuse or as feedwater for RO systems

Featured cases

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istac,istanbul, turkey

leachate treatment

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Ootmarsum, The Netherlands

Airlift™ MBR technology

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Johor Bahru, Malaysia

Coffee, waste streams

Glanerbrug, Netherlands

Municipal wastewater

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