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Ⅰ. What is the MBR wastewater treatment system?

MBR wastewater treatment system is a combination of "membrane separation technology" and "biochemical treatment technology". The use of integrated membrane bioreactor test equipment to solve domestic wastewater, so that the effluent quality is stable and better than the domestic miscellaneous drainage reuse specifications. MBR technology is now mainly used in areas such as reclaimed water reuse, urban sewage, industrial sewage, fecal sewage treatment, and lightly polluted drinking water purification.

Ⅱ. The application of MBR in the wastewater treatment

MBR has played an important role in solving the sewage in our lives, hospital wastewater, the liquid seeping from garbage stations, industrial wastewater, and all industrial wastewater with relatively high concentration and not easily degradable. Waste water treatment chemicals need to be pre-treated, most of which are combined with other processes.

Ⅲ. MBR anaerobic/ anoxic alternating process

The alternate anaerobic/anoxic-membrane bioreactor (A-A/A-M) process can improve the effect of nitrogen and phosphorus removal from domestic sewage. The process consists of an alternate anoxic/anaerobic reaction tank and anaerobic tank with a built-in membrane filtration unit. By changing the flow direction of the return sludge at the bottom of the aerobic tank, the anoxic and anaerobic environments are formed in two independent reactors (A and B) in turn to achieve simultaneous anaerobic phosphorus release, anoxic denitrification and denitrification, and aerobic phosphorus absorption, nitrification and BOD removal. The aerobic reactor performs continuous aeration to slow down the process of membrane fouling and prolong the cleaning cycle. The average removal rate of COD, TN and TP by this process reached 93%, 67.4% and 94.1% respectively.

Ⅳ. The technical advantages of MBR wastewater treatment

Membrane bioreactor can absorb and flocculate the fine colloids, extracellular polymers, dissolved organics, etc. in the sludge mixture, so that the particle size of the sludge becomes larger, the pressure resistance is enhanced, the porosity of the membrane surface sediment layer is improved, and the density is increased. The performance is reduced, thereby reducing the membrane filtration resistance and membrane fouling degree, and increasing the membrane flux. It can be seen that MBR wastewater treatment has great advantages in many aspects.

Ⅴ. Comparison of MBR and traditional water treatment technology

Project Name
Traditional Water Treatment TechnologyMBR Technology
Technological Composition
Pretreatment - biological reaction pool - sedimentation pool - coagulation pool - sedimentation pool - filtration - disinfection - clear water poolPretreatment-MBR pool-disinfection-clean pool
Construction Requirements
It is not easily modularized, but built in one go at maximum design capacity.It is easy to achieve a modular design, suitable for staged construction, which saves investment.
Space RequirementsRestricted by the setting placeIt is not limited by the setting site, there are surface type, semi-underground type and buried type
Effluent QualityIt does not meet the current national primary A standardBetter than the current national primary A standard
Floor SpaceLargeSmall
Water Production RateThe process itself consumes a lot of water and the water production rate is low.No backwashing is required, and the water production rate is high.
Excess Activated SludgeThe remaining activated sludge output is large, and the sludge treatment cost is high.The remaining activated sludge output is very small.
Operation ManagementWith more equipment and complex management, there is a higher possibility of malfunction and generally requires professional maintenance.
There are less equipment, simple process, and it's easy to realize fully automatic control. The operation is stable and reliable, and workers can take care of the machine after simple training.
ApplicationGenerally limited to flushing toilets, road cleaning and urban greening.The effluent water quality is excellent and it can be widely used for recycling, landscape water, etc.

MBR wastewater treatment has improved organic pollutant degradation and removal rates compared to conventional wastewater treatment technologies, and PAC is regenerated. The presence of PAC greatly improves the membrane contamination and thus extends the membrane cleaning cycle.

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