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The current provided by oxygen-reducing microbial cathodes is related to the composition of their bacterial community.
Bioelectrochemistry. 2015 Apr; 102:42-9.B

Abstract

Oxygen reducing biocathodes were formed from sludge under constant polarization at -0.2 and +0.4V/SCE. Under chronoamperometry at pH10.3 ± 0.3, current densities of 0.21 ± 0.03 and 0.12 ± 0.01 Am(-2) were displayed at -0.2V/SCE by the biocathodes formed at -0.2 and 0.4V/SCE, respectively. Voltammetry revealed similar general characteristics for all biocathodes and higher diffusion-limited current densities (0.84 ± 0.26 Am(-2)) than chronoamperometry. Up to 3.7 Am(-2) was reached under air bubbling. A theoretical model was proposed to show the consistency of the chronoamperometric and voltammetric data. The biocathodes formed at -0.2V/ECS that gave the highest electrochemical performance showed a homogeneous selection of Deinococcus-Thermus and Gemmatimonadetes, while the biocathodes formed at 0.4V/SCE were enriched in different bacteria. The biocathode that led to the worst electrochemical characteristics, while formed at -0.2V/SCE, showed the largest bacterial diversity. The biocathode performance was consequently related to the enrichment in specific microbial phyla. Moreover, the strong presence of bacteria parented to Deinococci may also have some interest in biotechnology.

Authors+Show Affiliations

Laboratoire de Génie Chimique, CNRS, Université de Toulouse, 4 allée Emile Monso, 31432 Toulouse, France. Electronic address: mickael.rimboud@ensiacet.fr.IRSTEA-Unité de Recherche Hydrosystèmes et Bioprocédés, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony, France.Laboratoire de Génie Chimique, CNRS, Université de Toulouse, 4 allée Emile Monso, 31432 Toulouse, France.IRSTEA-Unité de Recherche Hydrosystèmes et Bioprocédés, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony, France.Laboratoire de Génie Chimique, CNRS, Université de Toulouse, 4 allée Emile Monso, 31432 Toulouse, France.

Pub Type(s)

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

Language

eng

PubMed ID

25483999

Citation

Rimboud, Mickaël, et al. "The Current Provided By Oxygen-reducing Microbial Cathodes Is Related to the Composition of Their Bacterial Community." Bioelectrochemistry (Amsterdam, Netherlands), vol. 102, 2015, pp. 42-9.
Rimboud M, Desmond-Le Quemener E, Erable B, et al. The current provided by oxygen-reducing microbial cathodes is related to the composition of their bacterial community. Bioelectrochemistry. 2015;102:42-9.
Rimboud, M., Desmond-Le Quemener, E., Erable, B., Bouchez, T., & Bergel, A. (2015). The current provided by oxygen-reducing microbial cathodes is related to the composition of their bacterial community. Bioelectrochemistry (Amsterdam, Netherlands), 102, 42-9. https://doi.org/10.1016/j.bioelechem.2014.11.006
Rimboud M, et al. The Current Provided By Oxygen-reducing Microbial Cathodes Is Related to the Composition of Their Bacterial Community. Bioelectrochemistry. 2015;102:42-9. PubMed PMID: 25483999.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The current provided by oxygen-reducing microbial cathodes is related to the composition of their bacterial community. AU - Rimboud,Mickaël, AU - Desmond-Le Quemener,Elie, AU - Erable,Benjamin, AU - Bouchez,Théodore, AU - Bergel,Alain, Y1 - 2014/11/29/ PY - 2014/06/30/received PY - 2014/11/13/revised PY - 2014/11/21/accepted PY - 2014/12/9/entrez PY - 2014/12/9/pubmed PY - 2015/9/12/medline KW - Biocathode KW - Deinococci KW - Microbial cathode KW - Microbial fuel cell KW - Oxygen reduction SP - 42 EP - 9 JF - Bioelectrochemistry (Amsterdam, Netherlands) JO - Bioelectrochemistry VL - 102 N2 - Oxygen reducing biocathodes were formed from sludge under constant polarization at -0.2 and +0.4V/SCE. Under chronoamperometry at pH10.3 ± 0.3, current densities of 0.21 ± 0.03 and 0.12 ± 0.01 Am(-2) were displayed at -0.2V/SCE by the biocathodes formed at -0.2 and 0.4V/SCE, respectively. Voltammetry revealed similar general characteristics for all biocathodes and higher diffusion-limited current densities (0.84 ± 0.26 Am(-2)) than chronoamperometry. Up to 3.7 Am(-2) was reached under air bubbling. A theoretical model was proposed to show the consistency of the chronoamperometric and voltammetric data. The biocathodes formed at -0.2V/ECS that gave the highest electrochemical performance showed a homogeneous selection of Deinococcus-Thermus and Gemmatimonadetes, while the biocathodes formed at 0.4V/SCE were enriched in different bacteria. The biocathode that led to the worst electrochemical characteristics, while formed at -0.2V/SCE, showed the largest bacterial diversity. The biocathode performance was consequently related to the enrichment in specific microbial phyla. Moreover, the strong presence of bacteria parented to Deinococci may also have some interest in biotechnology. SN - 1878-562X UR - https://www.unboundmedicine.com/medline/citation/25483999/The_current_provided_by_oxygen_reducing_microbial_cathodes_is_related_to_the_composition_of_their_bacterial_community_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1567-5394(14)00192-3 DB - PRIME DP - Unbound Medicine ER -