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Inocula selection in microbial fuel cells based on anodic biofilm abundance of Geobacter sulfurreducens

Sun, Guotao and de Sacadura Rodrigues, Diogo and Thygesen, Anders and Daniel, Geoffrey and Fernando, Dinesh and Meyer, Anne S (2016). Inocula selection in microbial fuel cells based on anodic biofilm abundance of Geobacter sulfurreducens. Chinese Journal of Chemical Engineering. 24:3, 379-387
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Official URL: http://dx.doi.org/10.1016/j.cjche.2015.11.002

Abstract

Microbial fuel cells (MFCs) rely on microbial conversion of organic substrates to electricity. The optimal performance depends on the establishment of a microbial community rich in electrogenic bacteria. Usually this microbial community is established from inoculation of the MFC anode chamber with naturally occurring mixed inocula. In this study, the electrochemical performance of MFCs and microbial community evolution were evaluated for three inocula including domestic wastewater (DW), lake sediment (LS) and biogas sludge (BS) with varying substrate loading (L-sub) and external resistance (R-ext) on the MFC. The electrogenic bacterium Geobacter sulfurreducens was identified in all inocula and its abundance during MFC operation was positively linked to the MFC performance. The LS inoculated MFCs showed highest abundance (18%+/- 1%) of G. sulfurreducens, maximum current density [I-max = (690 +/- 30) mA.m(-2)] and coulombic efficiency (CE = 29% +/- 1%) with acetate as the substrate. I-max and CE increased to (1780 +/- 30) mA.m(-2) and 58% +/- 1%, respectively, after decreasing the R-ext from 1000 Omega to 200 Omega, which also correlated to a higher abundance of G. sulfurreducens (21% +/- 0.7%) on the MFC anodic biofilm. The data obtained contribute to understanding the microbial community response to L-sub and R-ext for optimizing electricity generation in MFCs.

Authors/Creators:Sun, Guotao and de Sacadura Rodrigues, Diogo and Thygesen, Anders and Daniel, Geoffrey and Fernando, Dinesh and Meyer, Anne S
Title:Inocula selection in microbial fuel cells based on anodic biofilm abundance of Geobacter sulfurreducens
Series/Journal:Chinese Journal of Chemical Engineering (1004-9541)
Year of publishing :2016
Volume:24
Number:3
Page range:379-387
Number of Pages:9
Publisher:Elsevier
ISSN:1004-9541
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:P Natural resources > P06 Renewable energy resources
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bioprocess Technology
Agrovoc terms:fuels, inoculation, microorganisms
Keywords:Lake sediment, Coulombic efficiency, Denaturing gradient gel electrophoresis, Geobacter sulfurreducens, Anode polarisation resistance
URN:NBN:urn:nbn:se:slu:epsilon-e-3614
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3614
Additional ID:
Type of IDID
Web of Science (WoS)000373607100008
ID Code:13557
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Products
Deposited By: SLUpub Connector
Deposited On:22 Aug 2016 11:54
Metadata Last Modified:11 Nov 2017 00:15

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