Outline

Project title:

Research on a two-stage dynamic membrane coupling process for wastewater treatment and energy recovery

Project leader:

Hu Yisong

Abstract:

Due to the requirements of enhancing resource recovery efficiency and lowering energy consumption involved in conventional wastewater treatment processes, in this project, a novel two-staged dynamic membrane process is developed for simultaneous wastewater treatment and energy recovery. The two-stage dynamic membrane process combines dynamic membrane filtration reactor (DMFR) with an anaerobic dynamic membrane bioreactor (AnDMBR). Due to different occurrence states of organics and nutrients in municipal wastewater, in the DMFR high-efficient concentration reduction of organic matter is achieved, while the produced permeate, rich in nutrients, is suitable for irrigation and so on. Meanwhile, because of high organic content and carbon and nitrogen ratios in the concentrate, high efficient anaerobic treatment and biogas recovery can be achieved in the AnDMBR. Through batch tests and continuous process experiments, the permeability and concentration properties of typical substances in municipal wastewater are illustrated, and the mechanism and method for the formation and stability adjusting of the dynamic membrane are investigated. Also, mathematical evaluation models are built based on resource recovery efficiency, carbon balance, energy expenditure and recovery balance. Finally a high-efficient and low energy consumption wastewater treatment technology is established resulting from the optimization of the two-stage dynamic membrane process. This provides a new process pattern for decentralized wastewater treatment and resource and energy recovery.