Development of membrane separation technology and membrane-based biore-actor in wastewater treatment: conventional membrane and dynamic membrane

Nowadays, membrane has played an important role in wastewater treatment. However, high mem-brane cost and membrane fouling has hindered the developing of conventional membrane separation technology. With low-cost supporting membrane and easy operation, dynamic membrane (DM) technology presents a new route for pollutants separation in wastewater treatment. Similar pollutants removal and high separation efficiency made it more suitable for application in waste -water pretreatment and sludge separation. To have a full understanding of recent development of membrane separation technology, microfiltration, ultrafiltration, nanofiltration, and dynamic membrane filtration were briefly introduced and compared in this study. The filtration and pollutants removal performance in membrane bioreactor and dynamic membrane bioreactor were also evaluated. Besides, future perspectives of membrane separation technology with membrane fouling control, membrane cost and maintenance were presented for better application of membrane technology. Overall, DM technology indicates one potential developing direction of membrane separation technology in wastewater treatment.