title: High-efficient acetate production from carbon dioxide using a bioanode microbial electrosynthesis system with bipolar membrane.
abstract: The aim of this study was to develop an efficient bioanode microbial electrosynthesis system (MES) to convert carbon dioxide into acetate using bioenergy from the wastewater. The bioanode MESs were constructed using proton exchange membrane (PEM) and bipolar membrane (BPM) as separator, respectively, and operated under different voltages (i.e., 0.8, 1.0, 1.2, and 1.4V). Since BPM could dissociate H2O into H+and OH-in situ to buffer the pH change in the chambers, the BPM-MES achieved 238% improvement in cathodic acetate production rate, 45% increase in anodic substrate removal efficiency, and more than five times enhancement in current output, as compared to the PEM-MES. The biomass on the surface of anode and cathode, and the relative abundance of Acetobacterium in the cathode of BPM-MES was higher than that in PEM-MES. Bioanode MES with BPM should be a useful microbial electrosynthesis strategy for acetate production using bioenergy from wastewater treatment.
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Yinbo
authors.initials: Y
authors.lastname: Xiang
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Guangli
authors.initials: G
authors.lastname: Liu
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Renduo
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Yaobin
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China. Electronic address: luohp5@mail.sysu.edu.cn.
authors.forename: Haiping
authors.initials: H
authors.lastname: Luo
mesh_terms: D000085:Acetates; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D002245:Carbon Dioxide; D004566:Electrodes
chemical_list: D000085:Acetates; D002245:Carbon Dioxide
keywords: Acetate production; Bioanode; Bipolar membrane; Carbon dioxide; Microbial electrosynthesis system