title: Nitrogen removal and electricity production at a double-chamber microbial fuel cell with cathode nitrite denitrification.
abstract: Double-chamber microbial fuel cell was applied to investigate the performance of the electricity production and nitrite denitrification through feeding nitrite into the cathode. Factors influencing denitrification performance and power production, such as external resistance, influent nitrite concentration and Nitrite Oxygen Bacteria inhibitors, were studied. The results show that when the concentration of nitrite nitrogen and external resistance were 100 mg L-1and 10 Ω, respectively, the nitrite denitrification reached the best state. The NaN3can inhibit nitrite oxidation effectively; meanwhile, the nitrite denitrification with N2O as the final products was largely improved. The [Formula: see text] was reduced to [Formula: see text], causing the cathode denitrification coulombic efficiency to exceed 100%. In chemoautotrophic bio-nitrification, microorganisms may utilize H2O to oxidize nitrite under anaerobic conditions. Proteobacteria might play a major role in the process of denitrification in MFC.
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.
authors.forename: Yangyang
authors.identifier: http://orcid.org/0000-0003-1296-7027
authors.initials: Y
authors.lastname: Yu
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.|b Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education , Xi'an , People's Republic of China.
authors.forename: Jianqiang
authors.identifier: http://orcid.org/0000-0002-0860-0006
authors.initials: J
authors.lastname: Zhao
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.
authors.forename: Sha
authors.initials: S
authors.lastname: Wang
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.
authors.forename: Huimin
authors.identifier: http://orcid.org/0000-0002-0860-0006
authors.initials: H
authors.lastname: Zhao
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Ding
authors.affiliation: a School of Environmental Science and Engineering , Chang'an University , Xi'an , People's Republic of China.
authors.forename: Kun
authors.initials: K
authors.lastname: Gao
mesh_terms: D001674:Bioelectric Energy Sources; D058440:Denitrification; D004560:Electricity; D004566:Electrodes; D009573:Nitrites / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*
chemical_list: D009573:Nitrites; D009584:Nitrogen
keywords: Microbial fuel cell; denitrification; electricity production; nitration; nitrite