Progress of Membrane Bioreactor

Membrane bioreactor is a new technology of water treatment which has been developed in recent years.Waste water treatment by means of membrane bioreactor can greatly save water resources,equipment and operating cost,reduce land occupied by equipment and avoid secondary pollution.At the same time,membrane bioreactor has many good characters such as covering small area,high automation,convenient fitting and maintaining,etc.Membrane biological reactor can be divided into separation membrane bioreactor,extraction membrane bioreactor and bubble less aeration membrane bioreactor according to the use of membrane module.Membrane fouling is a subject problem of hindering its development.Property of membrane itself and composition of wastewater together with process conditions are thought to be responsible for membrane pollution problem.The performance of membrane is expected to be improved by reverse-washing and cleaning method,so as to prolong the membrane life.There is an optimum backflush interval reported,it can applied for membrane cleaning.The characteristics and development for the membrane bioreactor and research about membrane were summarized in this paper.The existing problems of the membrane bioreactor for treatment the wastewater were discussed as well as the scopes of application of MBR,characteristics of membrane materials and the methods about membrane cleaning were shown.The applied foreground and further research directions of the membrane bioreactor were prospected.