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    Electrochemical study of multi-electrode microbial fuel cells under fed-batch and continuous flow conditions

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    Type
    Article
    Authors
    Ren, Lijiao
    Ahn, Yongtae cc
    Hou, Huijie
    Zhang, Fang cc
    Logan, Bruce E.
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2014-07
    Permanent link to this record
    http://hdl.handle.net/10754/598140
    
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    Abstract
    Power production of four hydraulically connected microbial fuel cells (MFCs) was compared with the reactors operated using individual electrical circuits (individual), and when four anodes were wired together and connected to four cathodes all wired together (combined), in fed-batch or continuous flow conditions. Power production under these different conditions could not be made based on a single resistance, but instead required polarization tests to assess individual performance relative to the combined MFCs. Based on the power curves, power produced by the combined MFCs (2.12 ± 0.03 mW, 200 ω) was the same as the summed power (2.13 mW, 50 ω) produced by the four individual reactors in fed-batch mode. With continuous flow through the four MFCs, the maximum power (0.59 ± 0.01 mW) produced by the combined MFCs was slightly lower than the summed maximum power of the four individual reactors (0.68 ± 0.02 mW). There was a small parasitic current flow from adjacent anodes and cathodes, but overall performance was relatively unaffected. These findings demonstrate that optimal power production by reactors hydraulically and electrically connected can be predicted from performance by individual reactors. © 2013 Elsevier B.V. All rights reserved.
    Citation
    Ren L, Ahn Y, Hou H, Zhang F, Logan BE (2014) Electrochemical study of multi-electrode microbial fuel cells under fed-batch and continuous flow conditions. Journal of Power Sources 257: 454–460. Available: http://dx.doi.org/10.1016/j.jpowsour.2013.11.085.
    Sponsors
    The authors thank David Jones for help with the analytical measurements. This research is supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2013.11.085
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jpowsour.2013.11.085
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