Instead of feeding membranes with pressure, there’s a different approach to utilize slight hydraulic pressure by submerging membranes into the feed slurry. Besides this hydraulic pressure there’s suction from the filtrate side.

These filters are commonly used in and with biological reactors where bacteria or other organisms are used for biological activities like organics reduction.  MBR allow running the reactor at higher loads and result in clean filtrate, complying with European and US legislations.

These filters are aerated for cleaning assist as well as additional oxygen input to support the biological activity.

Mann+Hummel (Microdyn) developed the Biocel membranes.

These are flat Sheet Laminate that combine all the positive characteristics of earlier hollow fiber and flat sheet membranes:

• High packing rate, much filtration area per volume

• Open flat sheet construction with no obstructions or fouling spots on the top

• Suitable for back wash

• Least chemical cleaning required

• Excellent drainage and filtration rates

• Very heavy duty sturdy self closing membranes

• Suitable for Mechanical Cleaning Process (MCP) with special polymeric granules to minimize the need of cleaning chemicals