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Performances of microbial fuel cells fed with rejected wastewater from BioCH4 and BioH2 processes treating molasses wastewater.

Abstract

An integrated process involving conventional anaerobic digestion and microbial fuel cells (MFCs) has attracted attention recently to produce sustainable energy and to treat wastewater efficiently. To evaluate the possibility of CH4-producing process (BioCH4)-MFC or H2-producing process (BioH2)-MFC integrating systems, the MFC performances were investigated using rejected wastewater from a BioCH4 reactor (RWCH4) or BioH2 reactor (RWH2) treating molasses wastewater. When RWCH4 or RWH2 was fed into a single-chamber MFC reactor (designated as AC-MFCCH4 and AC-MFCH2, respectively) at different hydraulic retention times (HRT) of 1-7 d, both MFC systems showed maximum electricity production efficiencies at a HRT of 3 d. In the AC-MFCCH4 reactor, the average current density and average power density were 60.5 mA·m(-2) and 8.8 mW·m(-2), respectively. The AC-MFCH2 reactor generated an average current density of 71.4 mA·m(-2) and an average power density of 12.0 mW·m(-2). The COD removal rates were 45.7% in the AC-MFCCH4 reactor and 90.3% in the AC-MFCH2 reactor. There were no significant differences of the eubacterial community structures between the MFC systems, where Proteobacteria was remarkably dominant in both MFC systems. However, the archaeal community structures were significantly different where Methanothrix (89.3%) was remarkably dominant in the AC-MFCCH4 system, while Methanothrix (52.5%) and Methanosarcina (33.5%) were abundant in the AC-MFCH2 system. These findings demonstrate that the utilization of MFCs after the BioCH4 or BioH2 process is advantageous for energy recovery as well as COD removal from molasses wastewater.

Authors+Show Affiliations

a Department of Environmental Science and Engineering , Ewha Womans University , Seoul , Republic of Korea.a Department of Environmental Science and Engineering , Ewha Womans University , Seoul , Republic of Korea. b Present address for Tae G. Kim, Ecological Information Management Team , National Institute of Ecology , Choongnam, 325-813, 33657 , Republic of Korea.a Department of Environmental Science and Engineering , Ewha Womans University , Seoul , Republic of Korea.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26756976

Citation

Lee, Yun-Yeong, et al. "Performances of Microbial Fuel Cells Fed With Rejected Wastewater From BioCH4 and BioH2 Processes Treating Molasses Wastewater." Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, vol. 51, no. 4, 2016, pp. 318-24.
Lee YY, Kim TG, Cho KS. Performances of microbial fuel cells fed with rejected wastewater from BioCH4 and BioH2 processes treating molasses wastewater. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2016;51(4):318-24.
Lee, Y. Y., Kim, T. G., & Cho, K. S. (2016). Performances of microbial fuel cells fed with rejected wastewater from BioCH4 and BioH2 processes treating molasses wastewater. Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, 51(4), 318-24. https://doi.org/10.1080/10934529.2015.1109394
Lee YY, Kim TG, Cho KS. Performances of Microbial Fuel Cells Fed With Rejected Wastewater From BioCH4 and BioH2 Processes Treating Molasses Wastewater. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2016;51(4):318-24. PubMed PMID: 26756976.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Performances of microbial fuel cells fed with rejected wastewater from BioCH4 and BioH2 processes treating molasses wastewater. AU - Lee,Yun-Yeong, AU - Kim,Tae G, AU - Cho,Kyung-Suk, Y1 - 2016/01/12/ PY - 2016/1/13/entrez PY - 2016/1/13/pubmed PY - 2016/10/19/medline KW - CH4-producing process KW - H2-producing process KW - microbial fuel cells (MFCs) KW - molasses wastewater SP - 318 EP - 24 JF - Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering JO - J Environ Sci Health A Tox Hazard Subst Environ Eng VL - 51 IS - 4 N2 - An integrated process involving conventional anaerobic digestion and microbial fuel cells (MFCs) has attracted attention recently to produce sustainable energy and to treat wastewater efficiently. To evaluate the possibility of CH4-producing process (BioCH4)-MFC or H2-producing process (BioH2)-MFC integrating systems, the MFC performances were investigated using rejected wastewater from a BioCH4 reactor (RWCH4) or BioH2 reactor (RWH2) treating molasses wastewater. When RWCH4 or RWH2 was fed into a single-chamber MFC reactor (designated as AC-MFCCH4 and AC-MFCH2, respectively) at different hydraulic retention times (HRT) of 1-7 d, both MFC systems showed maximum electricity production efficiencies at a HRT of 3 d. In the AC-MFCCH4 reactor, the average current density and average power density were 60.5 mA·m(-2) and 8.8 mW·m(-2), respectively. The AC-MFCH2 reactor generated an average current density of 71.4 mA·m(-2) and an average power density of 12.0 mW·m(-2). The COD removal rates were 45.7% in the AC-MFCCH4 reactor and 90.3% in the AC-MFCH2 reactor. There were no significant differences of the eubacterial community structures between the MFC systems, where Proteobacteria was remarkably dominant in both MFC systems. However, the archaeal community structures were significantly different where Methanothrix (89.3%) was remarkably dominant in the AC-MFCCH4 system, while Methanothrix (52.5%) and Methanosarcina (33.5%) were abundant in the AC-MFCH2 system. These findings demonstrate that the utilization of MFCs after the BioCH4 or BioH2 process is advantageous for energy recovery as well as COD removal from molasses wastewater. SN - 1532-4117 UR - https://www.unboundmedicine.com/medline/citation/26756976/Performances_of_microbial_fuel_cells_fed_with_rejected_wastewater_from_BioCH4_and_BioH2_processes_treating_molasses_wastewater_ L2 - https://www.tandfonline.com/doi/full/10.1080/10934529.2015.1109394 DB - PRIME DP - Unbound Medicine ER -