MBR (Membrane Bio-Reactor) can be broadly defined as systems integrating biological degradation of wastewater with membrane filtration. Set up of MBR plant is mainly utilizing a bioreactor and membrane filtration as one unit process for wastewater treatment thereby replacing, and in some cases supplementing, the solids separation function of secondary clarification and effluent filtration, resulting the possibility to eliminate the secondary clarification and operate at higher MLSS concentration. In summary, the MBR system is the combination of traditional Activated Sludge Treatment with the membrane technology. The design criteria of the system shall be base according to the traditional way of Activated Sludge Treatment principle. However, on top of that, the MBR modules are immersed and located in the air blow tank/ aeration basin (biological reactor tank), the clear water is pumped (sucked) out from the MBR modules. This shall possibly eliminate the needs of secondary clarifier.
Features of the MBR:
- Better control of biological activity
- Sewage that is free of bacteria and pathogens
- Smaller foot print
- Biodegradation efficiency enhanced 20% ~ 40%.
- Short Hydraulic Residence Time (HRT) & Long Sludge Residence Time (SRT)
- Activated sludge increase by 2 ~ 3 times
- Higher organic loading rates
- Convenient management with automatic control system.