期刊
ENVIRONMENTAL TECHNOLOGY
卷 38, 期 24, 页码 3093-3101出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2017.1290144
关键词
Microbial fuel cell; nitrite; denitrification; electricity production; nitration
资金
- Shaanxi Province Science and Technology Development Program [2014K15-03-02]
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-1 and 10 Omega, respectively, the nitrite denitrification reached the best state. The NaN3 can inhibit nitrite oxidation effectively; meanwhile, the nitrite denitrification with N2O as the final products was largely improved. The NO2- was reduced to NH4+, 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.
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