OSE-MBR STP are Membrane Bio Reactor based Sewage treatment and recycling plants. It is indigenously developed for meeting stringent treated water norms for sewage water and various other ETP's. It works on principle of biological digestion followed by specially designed submerged hollow fiber membrane filtration. Hollow fiber membranes have pore size of 0.1 –0.06 micron which ensures removal of pathogens and bacteria in treated water. OSE-MBR STP is a combination of membranes , pumps and other electrical equipment's which makes itself unique in operation and having hassle free maintenance.

A membrane bioreactor connects membrane filtration to a biological active sludge system. The membranes thus replace the sedimentation basin in classic biological purification and help to separate the sludge from the effluent. This helps to ensure that all floating matter is retained, whereby sedimentation is no longer a restrictive factor for sludge concentration. A membrane reactor is thus able to process significantly higher sludge concentrations and lower reactor volumes, compared to conventional systems.

The membrane can either be placed next to the biological basin (= external or separate system), or in the basin (= internal or submerged). External systems involve continuous crossflow circulation along the membranes. Both tubular and flat plate membranes are used to realise this. An internal system involves the effluent being extracted from the active sludge using under-pressure. This normally involves the use of hollow fibres or flat plate membranes.