Douglas M. Hodgson
Segregation of the anodic microbial communities in a microbial fuel cell cascade
Hodgson, Douglas M.; Smith, Ann; Dahale, Sonal; Stratford, James P.; Li, Jia V.; Gr�ning, Andr�; Bushell, Michael E.; Marchesi, Julian R.; Avignone Rossa, C.
Authors
Ann Smith
Sonal Dahale
James P. Stratford
Jia V. Li
Andr� Gr�ning
Michael E. Bushell
Julian R. Marchesi
C. Avignone Rossa
Abstract
© 2016 Hodgson, Smith, Dahale, Stratford, Li, Grüning, Bushell, Marchesi and Avignone Rossa. Metabolic interactions within microbial communities are essential for the efficient degradation of complex organic compounds, and underpin natural phenomena driven by microorganisms, such as the recycling of carbon-, nitrogen-, and sulfur-containing molecules. These metabolic interactions ultimately determine the function, activity and stability of the community, and therefore their understanding would be essential to steer processes where microbial communities are involved. This is exploited in the design of microbial fuel cells (MFCs), bioelectrochemical devices that convert the chemical energy present in substrates into electrical energy through the metabolic activity of microorganisms, either single species or communities. In this work, we analyzed the evolution of the microbial community structure in a cascade of MFCs inoculated with an anaerobic microbial community and continuously fed with a complex medium. The analysis of the composition of the anodic communities revealed the establishment of different communities in the anodes of the hydraulically connected MFCs, with a decrease in the abundance of fermentative taxa and a concurrent increase in respiratory taxa along the cascade. The analysis of the metabolites in the anodic suspension showed a metabolic shift between the first and last MFC, confirming the segregation of the anodic communities. Those results suggest a metabolic interaction mechanism between the predominant fermentative bacteria at the first stages of the cascade and the anaerobic respiratory electrogenic population in the latter stages, which is reflected in the observed increase in power output. We show that our experimental system represents an ideal platform for optimization of processes where the degradation of complex substrates is involved, as well as a potential tool for the study of metabolic interactions in complex microbial communities.
Citation
Hodgson, D. M., Smith, A., Dahale, S., Stratford, J. P., Li, J. V., Grüning, A., …Avignone Rossa, C. (2016). Segregation of the anodic microbial communities in a microbial fuel cell cascade. Frontiers in Microbiology, 7(MAY), https://doi.org/10.3389/fmicb.2016.00699
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 1, 2016 |
Online Publication Date | May 11, 2016 |
Publication Date | Jan 1, 2016 |
Deposit Date | Oct 2, 2019 |
Publicly Available Date | Oct 7, 2019 |
Journal | Frontiers in Microbiology |
Print ISSN | 1664-302X |
Electronic ISSN | 1664-302X |
Publisher | Frontiers Media |
Peer Reviewed | Peer Reviewed |
Volume | 7 |
Issue | MAY |
DOI | https://doi.org/10.3389/fmicb.2016.00699 |
Public URL | https://uwe-repository.worktribe.com/output/3453885 |
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Segregation of the Anodic Microbial Communities in a Microbial Fuel Cell Cascade
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Copyright Statement
Copyright © 2016 Hodgson, Smith, Dahale, Stratford, Li, Grüning, Bushell, Marchesi and Avignone Rossa. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance
with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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