Membrane bioreactor is a new type of wastewater treatment process which is an organic combination of Membrane technology and sewage biological treatment technology.It originated in the United States in the 1970s.
MBR在制药废水混乱关系的优点atment
1. High separation efficiency and guaranteed effluent quality
Pharmaceutical wastewater contains a large number of suspended substances, and the suspension and turbidity in the effluent are close to zero through membrane separation.In addition, because the wastewater contains toxic substances, easy to lead to sludge expansion phenomenon, in the membrane separation, will not affect the quality of effluent.
2. High sludge concentration and strong biochemical capacity
Almost all the activated sludge can stay in the reactor, and the sludge concentration of MBR can be effectively improved. The sludge concentration of MBR can reach 3000mg /L.Compared with the traditional process, it can improve the sludge concentration and avoid the loss of activated sludge after sludge bulking.Due to the high fluctuation of the quality and quantity of pharmaceutical wastewater, the increase of sludge concentration increases the treatment capacity of the reactor and can bear a higher impact load.
3. Improve the purification efficiency of refractory organic matter, and shorten the hydraulic retention time
The refractory organics in pharmaceutical wastewater are trapped in the reactor, and the contact time with microorganisms is more than that of traditional biological method, which is beneficial to the cultivation of some obligate microorganisms and improves the purification efficiency of refractory organics.In addition, due to the high purification efficiency of refractory organic compounds, MBR can shorten HRT under the premise of ensuring the effluent quality.
4. Good growth of nitrifying bacteria and good ammonia nitrogen removal effect
MBR的膜无法捕获氨氮，导致高氨的氮去除率主要是由于反应器中存在大量硝化细菌。反应堆为其生长和繁殖创造了有利的条件。硝化细菌在反应堆中的积累使MBR对氮具有很高的去除作用。在先前的工程案例中，Suke使用了活性污泥方法的合并过程和MBR处理化学药品工厂的废水。入口中的氨氮浓度为72.8-92.4mg/l，结果表明，在MBR池中除去几乎所有的氨氮，废水中的氨氮浓度为1.4-4.1mg/L，并且去除率为94.5-97.6％。
