Tags

Type your tag names separated by a space and hit enter

Enhancement of the denitrification activity by exoelectrogens in single-chamber air cathode microbial fuel cells.
Chemosphere. 2019 Jun; 225:548-556.C

Abstract

Single-chamber microbial fuel cells (MFCs) can efficiently treat wastewater containing nitrate, probably because the interaction between exoelectrogens and denitrifying bacteria may enhance the denitrification activity of MFCs. In this study, the denitrification of nitrate with a wide range of concentrations was investigated by using single-chamber air cathode MFCs. The maximum average denitrification rate of the MFCs inoculated and operated under closed-circuit conditions (Group N-CC) was up to 12.2 ± 0.6 kg NO3--N m-3 d-1 at a high nitrate concentration of 2000 mg NO3-N L-1, which was 74.3% higher than that of the MFCs inoculated and operated under open-circuit conditions and which was significantly higher than those of other MFC systems and many traditional bioreactors. The high denitrification activity of the MFCs of Group N-CC was attributed to the significant reduction of nitrite accumulation through the possible bioelectrochemical nitrite reduction by exoelectrogens that were only enriched at the anodes of the MFCs of Group N-CC. In addition, the MFCs of Group N-CC showed good stability (over 3.5 years) and low apparent activation energy (34.0 kJ mol-1) of the denitrification, indicating the good coexistence of exoelectrogens (Geobacter) and denitrifying bacteria (Thauera) with high performance on denitrification during the long-term operation.

Authors+Show Affiliations

State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China.State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China. Electronic address: shaoancheng@zju.edu.cn.State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China.State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China.State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China.State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30901649

Citation

Huang, Haobin, et al. "Enhancement of the Denitrification Activity By Exoelectrogens in Single-chamber Air Cathode Microbial Fuel Cells." Chemosphere, vol. 225, 2019, pp. 548-556.
Huang H, Cheng S, Li F, et al. Enhancement of the denitrification activity by exoelectrogens in single-chamber air cathode microbial fuel cells. Chemosphere. 2019;225:548-556.
Huang, H., Cheng, S., Li, F., Mao, Z., Lin, Z., & Cen, K. (2019). Enhancement of the denitrification activity by exoelectrogens in single-chamber air cathode microbial fuel cells. Chemosphere, 225, 548-556. https://doi.org/10.1016/j.chemosphere.2019.03.052
Huang H, et al. Enhancement of the Denitrification Activity By Exoelectrogens in Single-chamber Air Cathode Microbial Fuel Cells. Chemosphere. 2019;225:548-556. PubMed PMID: 30901649.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhancement of the denitrification activity by exoelectrogens in single-chamber air cathode microbial fuel cells. AU - Huang,Haobin, AU - Cheng,Shaoan, AU - Li,Fujian, AU - Mao,Zhengzhong, AU - Lin,Zhufan, AU - Cen,Kefa, Y1 - 2019/03/11/ PY - 2018/07/14/received PY - 2019/02/24/revised PY - 2019/03/10/accepted PY - 2019/3/23/pubmed PY - 2019/6/14/medline PY - 2019/3/23/entrez KW - Bioelectrochemical nitrite reduction KW - Denitrification KW - Microbial community KW - Microbial fuel cells KW - Single-chamber KW - Stability SP - 548 EP - 556 JF - Chemosphere JO - Chemosphere VL - 225 N2 - Single-chamber microbial fuel cells (MFCs) can efficiently treat wastewater containing nitrate, probably because the interaction between exoelectrogens and denitrifying bacteria may enhance the denitrification activity of MFCs. In this study, the denitrification of nitrate with a wide range of concentrations was investigated by using single-chamber air cathode MFCs. The maximum average denitrification rate of the MFCs inoculated and operated under closed-circuit conditions (Group N-CC) was up to 12.2 ± 0.6 kg NO3--N m-3 d-1 at a high nitrate concentration of 2000 mg NO3-N L-1, which was 74.3% higher than that of the MFCs inoculated and operated under open-circuit conditions and which was significantly higher than those of other MFC systems and many traditional bioreactors. The high denitrification activity of the MFCs of Group N-CC was attributed to the significant reduction of nitrite accumulation through the possible bioelectrochemical nitrite reduction by exoelectrogens that were only enriched at the anodes of the MFCs of Group N-CC. In addition, the MFCs of Group N-CC showed good stability (over 3.5 years) and low apparent activation energy (34.0 kJ mol-1) of the denitrification, indicating the good coexistence of exoelectrogens (Geobacter) and denitrifying bacteria (Thauera) with high performance on denitrification during the long-term operation. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/30901649/Enhancement_of_the_denitrification_activity_by_exoelectrogens_in_single_chamber_air_cathode_microbial_fuel_cells_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)30488-6 DB - PRIME DP - Unbound Medicine ER -