부산대학교 도서관

MBR, Membrane Bio Reactor, is an advanced wastewater treatment system which is combination of activated sludge process and membrane separation technology. UF/MF membranes are an alternative of separating solid/liquid which is done by secondary clarifiers in the conventional method. The advantages of MBR are high quality of treated water and smaller footprint in comparison with to the conventional process 1). MBR has received much attention as a technical solution for water conservation. It is the reason why high quality of treated water by MBR is available to water reuse. A major disadvantage of MBR is higher operating cost by comparison with the conventional activated process. And majority of life cycle cost is for air scouring energy. Low aeration demand for air scouring to clean the membrane surface and high membrane flux are significant factors to reduce energy demand of MBR 2). To lower energy demand of MBR, we have developed the compact membrane modules which have 60% higher packing density. And we also have developed the diffuser which can uniformly discharge even less amount of the air for membrane scouring. Based on these techniques, we put “STERAPORETM 5600 series” (2011) and “STERAPORETM 5700 series” (2014) into the market. This paper describes key features and the references of these products and techniques.