title: Effect of dissolved oxygen on nitrogen and phosphorus removal and electricity production in microbial fuel cell.
abstract: Performance of a two-chamber microbial fuel cell (MFC) was evaluated with the influence of cathodic dissolved oxygen (DO). The maximum voltage, coulombic efficiency and maximum power density outputs of MFC decreased from 521 to 303 mV, 52.48% to 23.09% and 530 to 178 mW/m(2) with cathodic DO declining. Furthermore, a great deal of total phosphorus (TP) was removed owing to chemical precipitation (about 80%) and microbial absorption (around 4-17%). COD was first removed in anode chamber (>70%) then in cathode chamber (<5%). Most of nitrogen was removed when the cathodic DO was at low levels. Chemical precipitates formed in cathode chamber were verified as phosphate, carbonate and hydroxyl compound with the aid of scanning electron microscope capable of energy dispersive spectroscopy (SEM-EDS), X-ray diffractometer (XRD) and Fourier transform infrared spectroscopy (FTIR).
authors.affiliation: College of Environmental Science and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
authors.forename: Qinqin
authors.initials: Q
authors.lastname: Tao
authors.affiliation: College of Environmental Science and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Luo
authors.affiliation: College of Environmental Science and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Zhou
authors.affiliation: College of Environmental Science and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China; Guizhou Academy of Sciences, Shanxi Road 1, Guiyang 550001, PR China; State Key Laboratory of Subtropical Building Sciences, South China University of Technology, Guangzhou 510641, PR China; Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China. Electronic address: fesqzhou@scut.edu.cn.
authors.forename: Shaoqi
authors.initials: S
authors.lastname: Zhou
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China.
authors.forename: Guangli
authors.initials: G
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China.
authors.forename: Renduo
authors.initials: R
authors.lastname: Zhang
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D011232:Chemical Precipitation; D004560:Electricity; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000302:isolation & purification*; D010100:Oxygen / Q000494:pharmacology*; D010758:Phosphorus / Q000302:isolation & purification*; D012995:Solubility; D062065:Wastewater / Q000737:chemistry
chemical_list: D009584:Nitrogen; D010100:Oxygen; D010758:Phosphorus; D062065:Wastewater
keywords: Dissolved oxygen; Microbial fuel cell; Nitrogen; Phosphorus; Precipitate