MBR domestic water treatment technology

MBR composition

Judging from the overall structure, MBR is mainly composed of membrane module, bioreactor and pump this three parts. in which the bioreactor is the main place pollutant degradation, membrane ystem is equivalent to the secondary settling tank of biological treatment system.play the role of solid-liquid separation function, and water pump is the system power source.
According to membrane module set position can be integrated into integrated type and split type.
The former is the membrane is placed inside the bioreactor, and the other is the membrane bioreactor setted separately, it is clear that type of MBR split because of the increased sludge return pump and maintain a certain flow rate and the presence of membrane surface power consumption, high operating costs of the system problem, compared with integrated MBR membrane surface air cross-flow generated by aeration agitation produced without sludge return system, so the system is relatively simple, relatively energy low, which is currently residential water reuse treatment processes commonly used form.
Process Features
MBR process compared to other biological treatment process, has the following characteristics:
(1) Good water quality, high stability of water so as to obtain biological membrane transition much higher concentrations than conventional activated sludge bioreactor, which greatly improves the biodegradability and resistance to shock loading capability. Meanwhile, the sludge retention time is longer, it also difficult degradation of organic matter decomposing bacteria and nitrification bacteria proliferation slow propagation of microbes can be enriched in the reactor, in particular the removal of biodegradable organic matter and ammonia can achieve the desired effect. On the other hand, is smaller than the pore size of the membrane separation have interception organic macromolecules, to ensure that the water in the filter after sterilization, eliminate suspended solids and reduce BOD aspect is very stable. At the same time you can view China sewage treatment project net more technical documentation.
(2)Small footprint, membrane bioreactor can maintain a high sludge concentration, usually MLSS of 8 ~ 20g / L, it is 2.5 to 5 times of the conventional biological treatment, while the system saves the need for secondary sedimentation tank and sludge return equipment, which covers a small area.
(3)Operation and maintenance simple membrane separation unit process is simple, running water and mud from sludge expansion and other factors, easy operation and maintenance, and easy to implement automatic control and management.
(4) Low-cost sludge treatment, long sludge age. Which means less mud, , and sludhe only be 30% of traditional process. Which is good to the follow-up of the sludge treatment.

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