Membrane Bioreactor (MBR) technology is designed to define wastewater treatment processes, and it combines perm-selective submerged membrane (hollow fiber membrane eg Microfiltration/ Ultrafiltration or flat sheet membrane) system with biological process (a suspended growth bioreactor), so there are two types of MBR systems, hollow fiber MBR and flat sheet MBR.)
Generally, MBR systems include external/sidestream MBR (sMBR) and internal/submerged MBR (iMBR). sMBR is that the filtration membrane system are installed outside of bio-reactor tank, and iMBR means the membrane system installed in the bio-reactor tank.
Compared to conventional activated sludge water treatment process, MBR systems replace the needs for secondary clarifiers and tertiary treatment, allowing for increased performance with small footprint.
|Item||MBR Process||Conventional Process|
|Process||Simple||Long and complex|
|Construction Requirements||Modular design||Not easy to achieve modular design.
It is better to build all system in one time
|It is suit for stage construction, save cost|
|Effluent Quality||Higher permeate water quality than national discharge water standard||Reach the national discharge water standard just in a short time|
|Water Productivity||Higher flux and periodically backwash or chemical clean||Sand filter tank or actived carbon tank need to backwash frequently. Process itself will consume cleaning water, so lower water production|
|Excess Activated Sludge||Lower sludge production, lower cost of sludge disposal||More sludge production, higher cost of sludge disposal|
|Operation Management||Simple process and automatic operation, operator only need a simple training||It is easy to have breakdowns as the complex process structure, and need professional person to maintain the system|
MBRs become an attractive wastewater treatment option when:
Submerged PVDF Hollow Fiber MBR Module
Submerged PVDF Flat Sheet MBR Module
Submerged PTFE Flat Sheet MBR Module
PVDF Hollow Fiber MBR System
PTFE Flat Sheet MBR System
PVDF Flat Sheet MBR System