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Long-term effect of set potential on biocathodes in microbial fuel cells: electrochemical and phylogenetic characterization.
Bioresour Technol. 2012 Sep; 120:26-33.BT

Abstract

The long-term effect of set potential on oxygen reducing biocathodes was investigated in terms of electrochemical and biological characteristics. Three biocathodes were poised at 200, 60 and -100 mV vs. saturated calomel electrode (SCE) for 110 days, including the first 17 days for startup. Electrochemical analyses showed that 60 mV was the optimum potential during long-term operation. The performance of all the biocathodes kept increasing after startup, suggesting a period longer than startup time needed to make potential regulation more effective. The inherent characteristics without oxygen transfer limitation were studied. Different from short-term regulation, the amounts of biomass were similar while the specific electrochemical activity was significantly influenced by potential. Moreover, potential showed a strong selection for cathode bacteria. Clones 98% similar with an uncultured Bacteroidetes bacterium clone CG84 accounted for 75% to 80% of the sequences on the biocathodes that showed higher electrochemical activity (60 and -100 mV).

Authors+Show Affiliations

State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

22784950

Citation

Xia, Xue, et al. "Long-term Effect of Set Potential On Biocathodes in Microbial Fuel Cells: Electrochemical and Phylogenetic Characterization." Bioresource Technology, vol. 120, 2012, pp. 26-33.
Xia X, Sun Y, Liang P, et al. Long-term effect of set potential on biocathodes in microbial fuel cells: electrochemical and phylogenetic characterization. Bioresour Technol. 2012;120:26-33.
Xia, X., Sun, Y., Liang, P., & Huang, X. (2012). Long-term effect of set potential on biocathodes in microbial fuel cells: electrochemical and phylogenetic characterization. Bioresource Technology, 120, 26-33. https://doi.org/10.1016/j.biortech.2012.06.017
Xia X, et al. Long-term Effect of Set Potential On Biocathodes in Microbial Fuel Cells: Electrochemical and Phylogenetic Characterization. Bioresour Technol. 2012;120:26-33. PubMed PMID: 22784950.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term effect of set potential on biocathodes in microbial fuel cells: electrochemical and phylogenetic characterization. AU - Xia,Xue, AU - Sun,Yanmei, AU - Liang,Peng, AU - Huang,Xia, Y1 - 2012/06/16/ PY - 2012/04/27/received PY - 2012/06/09/revised PY - 2012/06/09/accepted PY - 2012/7/13/entrez PY - 2012/7/13/pubmed PY - 2012/12/12/medline SP - 26 EP - 33 JF - Bioresource technology JO - Bioresour Technol VL - 120 N2 - The long-term effect of set potential on oxygen reducing biocathodes was investigated in terms of electrochemical and biological characteristics. Three biocathodes were poised at 200, 60 and -100 mV vs. saturated calomel electrode (SCE) for 110 days, including the first 17 days for startup. Electrochemical analyses showed that 60 mV was the optimum potential during long-term operation. The performance of all the biocathodes kept increasing after startup, suggesting a period longer than startup time needed to make potential regulation more effective. The inherent characteristics without oxygen transfer limitation were studied. Different from short-term regulation, the amounts of biomass were similar while the specific electrochemical activity was significantly influenced by potential. Moreover, potential showed a strong selection for cathode bacteria. Clones 98% similar with an uncultured Bacteroidetes bacterium clone CG84 accounted for 75% to 80% of the sequences on the biocathodes that showed higher electrochemical activity (60 and -100 mV). SN - 1873-2976 UR - https://www.unboundmedicine.com/medline/citation/22784950/Long_term_effect_of_set_potential_on_biocathodes_in_microbial_fuel_cells:_electrochemical_and_phylogenetic_characterization_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-8524(12)00921-2 DB - PRIME DP - Unbound Medicine ER -