title: Assessment of a novel overflow-type electrochemical membrane bioreactor (EMBR) for wastewater treatment, energy recovery and membrane fouling mitigation.
abstract: A novel overflow-type electrochemical membrane bioreactor (EMBR) without ion exchange membrane, was developed for wastewater treatment and utilized electricity recovered by microbial fuel cell (MFC) for membrane fouling mitigation in membrane bioreactor (MBR). The maximum power density of 629mW/m(3) or 7.18mW/m(2) was obtained. The removal efficiencies of chemical oxygen demand, ammonia nitrogen and total nitrogen under appropriate ranges of hydraulic retention times (16.9-8.5h) were 92.6±5.4%, 96.5±2.8% and 73.9±9.7%, respectively. Sequencing showed electrochemically active bacteria Lactococcus, Bacillus and Saprospiraceae_uncultured were abundant in the biofilm. Compared with a conventional MBR, five significant effects of the MFC integration on the sludge properties, including particle zeta potential decrease, particle size distribution macroaggregation, soluble microbial products and extracellular polymeric substances reduction and SMPP/SMPC ratio increase, were achieved in this system, leading to membrane fouling mitigation. This system shows great promise for practical wastewater treatment application.
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
authors: Guowang
authors: G
authors: Zhou
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
authors: Yuhong
authors: Y
authors: Zhou
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
authors: Guoqiang
authors: G
authors: Zhou
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
authors: Lian
authors: L
authors: Lu
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
authors: Xiankai
authors: X
authors: Wan
authors: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China. Electronic address: huixiang_shi@163.com.
authors: Huixiang
authors: H
authors: Shi
mesh_terms: D001674:Bioelectric Energy Sources / Q000382:microbiology; D057219:Biofouling / Q000517:prevention & control*; D019149:Bioreactors / Q000382:microbiology*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods; D008567:Membranes, Artificial; D062065:Wastewater; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D008567:Membranes, Artificial; D062065:Wastewater
keywords: Energy recovery; Membrane bioreactor; Membrane fouling mitigation; Microbial fuel cell; Wastewater treatment