Introduction to Membrane Bioreactor (MBR) Technology

Membrane bioreactor ( MBR ) technology is a new type of sewage treatment and reuse technology that organically combines membrane separation technology and traditional sewage biological treatment technology and greatly enhances biological treatment technology. It is also called membrane separation activated sludge method. On the one hand, the membrane bioreactor (MBR) uses membrane separation components (MBR membranes ) to intercept activated sludge and macromolecular organic matter in the biochemical reaction tank, greatly increasing the concentration of activated sludge in the biochemical reaction tank. At the same time, difficult-to-degrade substances are continuously reacted and degraded in the biochemical reaction tank, making the biochemical reaction of degrading wastewater more rapid and thorough, and improving the effluent quality. On the other hand, the high filtration accuracy of the membrane separation components (MBR membranes )in the membrane bioreactor(MBR) ensures clear and transparent effluent, thus eliminating the need for a secondary sedimentation tank and greatly improving the system's solidliquid separation capacity.

CharacteristicsofMembraneBioreactor(MBR)Technology

• High pollutant removal efficiency, good effluent quality, can be directly reused

• The extensive air-water circulation within the membrane bioreactor (MBR) ensures thorough mixing of the wastewater, resulting in highly dispersed activated sludge. This significantly increases the activated sludge's specific surface area, enhancing its affinity for the substrate and contributing to improved pollutant removal. This is difficult to achieve with the large flocs formed in traditional activated sludge processes. Furthermore, the high filtration accuracy of the membrane separation components (MBR membranes) ensures the clarity and transparency of the effluent, fully meeting reuse standards and allowing for direct reuse.

• Hydraulic retention time (HRT) and sludge retention time (SRT) are completely separate

• Since the membrane bioreactor (MBR) uses membrane separation components (MBR membrane) to completely retain the activated sludge in the biochemical reaction tank, it achieves complete separation of hydraulic retention time (HRT) and sludge retention time (SRT), making the system's operation control more flexible and stable.

• High biomass concentration, large volume loading and small footprint

• Since the membrane bioreactor (MBR) uses membrane separation components (MBR membranes) to completely retain the activated sludge in the biochemical reaction tank, the sludge concentration can reach about 7000-12000 mg/l, and the biological concentration in the biochemical reaction tank can reach 2-3 times that of the traditional activated sludge method, so the volume load is large and land is saved.

• Long sludge age and small amount of residual sludge

• Due to the long sludge age, most microorganisms in the biochemical reaction tanks are in an endogenous decline period. The membrane bioreactor (MBR) acts as a "sludge nitrification tank", which significantly reduces the generation of excess sludge and greatly saves the cost of excess sludge treatment.

• Good denitrification effect

• Since the membrane bioreactor (MBR) uses a membrane separation component (MBR membrane) to completely retain the activated sludge in the biochemical reaction tank, it is conducive to the retention, proliferation and reproduction of slow-growing nitrifying bacteria, greatly improving the denitrification effect of the system.

• Strong resistance to load impact

• Since the membrane bioreactor (MBR) uses a membrane separation component (MBR membrane) to completely retain the activated sludge in the biochemical reaction tank, during the operation of the system, the activated sludge will change with the change of the concentration of the entering organic matter and reach a dynamic balance, which greatly improves the system's ability to resist load shocks and stabilizes the effluent water quality.

• The system is easy to realize automatic control and convenient operation and management

Themainapplicationareasofmembranebioreactor(MBR)technology

• Refractory industrial wastewater: chemical wastewater, pharmaceutical wastewater, coking wastewater, landfill leachate, etc.

• High-concentration organic wastewater: food processing wastewater, aquaculture wastewater, etc.

• General wastewater: domestic wastewater, urban sewage, etc.

• Upgrading and renovation of sewage treatment facilities, etc.