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Effects of proton exchange membrane on the performance and microbial community composition of air-cathode microbial fuel cells.
J Biotechnol. 2015 Oct 10; 211:130-7.JB

Abstract

This study investigated the effects of proton exchange membranes (PEMs) on performance and microbial community of air-cathode microbial fuel cells (MFCs). Air-cathode MFCs with reactor volume of 1L were constructed in duplicate with or without PEM (designated as ACM-MFC and AC-MFC, respectively) and fed with a mixture of glucose and acetate (1:1, w:w). The maximum power density and coulombic efficiency did not differ between MFCs in the absence or presence of a PEM. However, PEM use adversely affected maximum voltage production and the rate of organic compound removal (p<0.05). Quantitative droplet digital PCR indicated that AC-MFCs had a greater bacterial population than ACM-MFCs (p<0.05). Likewise, ribosomal tag pyrosequencing revealed that the diversity index of bacterial communities was greater for AC-MFCs (p<0.05). Network analysis revealed that the most abundant genus was Enterococcus, which comprised ≥62% of the community and was positively associated with PEM and negatively associated with the rate of chemical oxygen demand (COD) removal (Pearson correlation>0.9 and p<0.05). Geobacter, which is known as an exoelectrogen, was positively associated with maximum power density and negatively associated with PEM. Thus, these results suggest that the absence of PEM favored the growth of Geobacter, a key player for electricity generation in MFC systems. Taken together, these findings demonstrate that MFC systems without PEM are more efficient with respect to power production and COD removal as well as exoelectrogen growth.

Authors+Show Affiliations

Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea.Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea.Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea. Electronic address: kscho@ewha.ac.kr.

Pub Type(s)

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

Language

eng

PubMed ID

26235818

Citation

Lee, Yun-Yeong, et al. "Effects of Proton Exchange Membrane On the Performance and Microbial Community Composition of Air-cathode Microbial Fuel Cells." Journal of Biotechnology, vol. 211, 2015, pp. 130-7.
Lee YY, Kim TG, Cho KS. Effects of proton exchange membrane on the performance and microbial community composition of air-cathode microbial fuel cells. J Biotechnol. 2015;211:130-7.
Lee, Y. Y., Kim, T. G., & Cho, K. S. (2015). Effects of proton exchange membrane on the performance and microbial community composition of air-cathode microbial fuel cells. Journal of Biotechnology, 211, 130-7. https://doi.org/10.1016/j.jbiotec.2015.07.018
Lee YY, Kim TG, Cho KS. Effects of Proton Exchange Membrane On the Performance and Microbial Community Composition of Air-cathode Microbial Fuel Cells. J Biotechnol. 2015 Oct 10;211:130-7. PubMed PMID: 26235818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of proton exchange membrane on the performance and microbial community composition of air-cathode microbial fuel cells. AU - Lee,Yun-Yeong, AU - Kim,Tae Gwan, AU - Cho,Kyung-Suk, Y1 - 2015/07/30/ PY - 2015/03/05/received PY - 2015/06/24/revised PY - 2015/07/27/accepted PY - 2015/8/4/entrez PY - 2015/8/4/pubmed PY - 2016/6/19/medline KW - Bacterial community KW - COD removal KW - Microbial fuel cells (MFCs) KW - Network analysis KW - Proton exchange membrane (PEM) SP - 130 EP - 7 JF - Journal of biotechnology JO - J Biotechnol VL - 211 N2 - This study investigated the effects of proton exchange membranes (PEMs) on performance and microbial community of air-cathode microbial fuel cells (MFCs). Air-cathode MFCs with reactor volume of 1L were constructed in duplicate with or without PEM (designated as ACM-MFC and AC-MFC, respectively) and fed with a mixture of glucose and acetate (1:1, w:w). The maximum power density and coulombic efficiency did not differ between MFCs in the absence or presence of a PEM. However, PEM use adversely affected maximum voltage production and the rate of organic compound removal (p<0.05). Quantitative droplet digital PCR indicated that AC-MFCs had a greater bacterial population than ACM-MFCs (p<0.05). Likewise, ribosomal tag pyrosequencing revealed that the diversity index of bacterial communities was greater for AC-MFCs (p<0.05). Network analysis revealed that the most abundant genus was Enterococcus, which comprised ≥62% of the community and was positively associated with PEM and negatively associated with the rate of chemical oxygen demand (COD) removal (Pearson correlation>0.9 and p<0.05). Geobacter, which is known as an exoelectrogen, was positively associated with maximum power density and negatively associated with PEM. Thus, these results suggest that the absence of PEM favored the growth of Geobacter, a key player for electricity generation in MFC systems. Taken together, these findings demonstrate that MFC systems without PEM are more efficient with respect to power production and COD removal as well as exoelectrogen growth. SN - 1873-4863 UR - https://www.unboundmedicine.com/medline/citation/26235818/Effects_of_proton_exchange_membrane_on_the_performance_and_microbial_community_composition_of_air_cathode_microbial_fuel_cells_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0168-1656(15)30075-4 DB - PRIME DP - Unbound Medicine ER -