Membrane Bioreactor (MBR)
Process

The activated sludge process is utilized for treatment of organic compounds, nitrogenous substances and so forth in wastewater. Standard activated sludge treatment utilizes a settling tank for separation of the treated water and activated sludge, but rising sludge can make separation difficult, sometimes resulting in contamination by polluted sludge.
With the development of the membrane bioreactor (MBR) approach, it is possible to separate polluted sludge using a membrane to prevent contamination of the treated water.

Characteristics

The sedimentation tank used in standard approaches becomes unnecessary, resulting in a smaller equipment footprint.
Possible to increase sludge concentration, enabling tank volume reductions.
Possible to achieve stable water properties through separation membrane filtering.
No outflow of sludge due to bulking and other such problems, facilitating operation management.