| |
|
|
|
|
 |
| |
| MBR - MEMBRANE BIORECTORS |
|
MBR
The FM membrane bioreactor (MBR) process is a technology that consists of a suspended growth biological reactor integrated with an ultrafiltration membrane system using a flat-plate membrane. Essentially, the membrane acts as a filter and replaces the solids separation function of secondary clarifiers and sand filters in a conventional activated sludge system. The quality of effluent achieved is superior to conventional systems.
The membranes are immersed in an aeration tank and are in direct contact with mixed liquor. Through the use of a permeate pump, a suction lift is applied that “sucks” the permeate out of the membrane, ensuring that all solids remain in the aeration tank. The flow through the membrane (called flux) is kept low to ensure long-life of the membranes and avoid frequent need of chemical cleaning. The membrane plates are also kept “clean” by air scouring the membrane plates with the air scouring action rejecting solids away from the membrane surface.
The membrane bioreactor technology effectively overcomes the problems associated with poor settling of sludge in conventional activated sludge processes. The MBR technology permits bioreactor operation with considerably higher mixed liquor solids concentrations than conventional activated sludge systems that are limited by sludge settling, thus allowing a smaller plant footprint for the same volume of flow treated. The process typically operates at a mixed liquor suspended solids (MLSS) concentration in the range of 8,000 to 10,000 mg/l and at elevated biomass concentrations to allow for highly effective removal of both soluble and particulate biodegradable material in the waste stream. Higher effluent quality is achieved, with standard operation allowing levels of BOD, SS and Ammonia-N concentrations of less than 5mg/l.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Tel: +44(0) 28 302 66616 |
|
Greenbank
Industrial Estate, Newry, BT34 2PB, N. Ireland |
|
|
|
|
|
|
