Crossflow MBR

Crossflow MBR is developed to treat (industrial) wastewater streams high in Mixed Liquid Suspended Solids (MLSS: 10-30+g/l) at high fluxes (80-200 l/m²h). It can be operated entirely automated and continuously with a high TMP (1-5 bar). Typical applications can be found in the food & beverage, brewing, and oil & gas industries, as well as in heavy-duty municipal applications such as leachate treatment.



  • Low membrane fouling due to the Crossflow process
  • Ability to work with high MLSS (12-30+ g/l)
  • High fluxes (80-200 l/m²h)
  • Simple, clean and continuous process
  • Excellent permeate quality
  • Long membrane lifetime
  • Simple and clean access for maintenance
  • Smallest footprint
  • Operating at TMP of 1 to 5 bar

typical use

In a Membrane Bioreactor (MBR), the advantages of biological treatment and membrane filtration are combined. Crossflow MBR applies pressurized inside-out UF membranes which are placed outside the bioreactor for a clean process that is easy to operate and maintain. 

Crossflow operation prevents membrane fouling, enabling Crossflow MBR to deal with even higher MLSS than our Airlift MBR concept. 

Recirculation ensures that the recycling water/sludge helps to keep the membranes clean, while simultaneously separating clean water from the feed. 


Crossflow MBR combines membranes with biological treatment. With carefully selected partners for the biological part, Pentair develops innovative and ready-to-use membrane installations that meet both regulatory and financial KPI’s. The Pentair scope consists of the modular skid concept, X-Flow tubular membranes, engineering, commissioning and process optimization. 

As one of the world’s foremost membrane technology knowledge centers, we share our scientific know-how and practical experience with our partners to make the difference in challenging filtration projects. Our unique services during start-up and commissioning ensure a flawlessly functioning MBR that will beat the expectations.

Fields of application

Developed for (industrial) wastewater applications, the Crossflow MBR is at its best with difficult to treat wastewater. The Crossflow MBR needs more energy (1,5-4 kWh/m³) than our Airlift MBR (<0,25 kWh/m3), but offers the advantages of a continuous process and a minimal footprint. Furthermore, it can deal with very high MLSS (12-30+ g/l) and work with a significantly higher flux (80-200 l/m2h).
In specific circumstances, with a COD > 7,000 ppm, the business case for anaerobic MBR may be more favorable, as it also produces renewable energy (biogas). 

Based on your specific feedwater characteristics, our specialist can easily determine the optimum solution for your challenge.

This type of MBR is suited for feed capacities <100m3/h. 

Featured cases

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istac,istanbul, turkey

leachate treatment

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