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  • Title: Improving electricity production in tubular microbial fuel cells through optimizing the anolyte flow with spiral spacers.
    Author: Zhang F, Ge Z, Grimaud J, Hurst J, He Z.
    Journal: Bioresour Technol; 2013 Apr; 134():251-6. PubMed ID: 23500582.
    Abstract:
    The use of spiral spacers to create a helical flow for improving electricity generation in microbial fuel cells (MFCs) was investigated in both laboratory and on-site tests. The lab tests found that the MFC with the spiral spacers produced more electricity than the one without the spiral spacers at different recirculation rates or organic loading rates, likely due to the improved transport/distribution of ions and electron mediators instead of the substrates because the organic removal efficiency was not obviously affected by the presence of the spiral spacers. The energy production in the MFC with the spiral spacers reached 0.071 or 0.073 kWh/kg COD in either vertical or horizontal installment. The examination of the MFCs installed in an aeration tank of a municipal wastewater treatment plant confirmed the advantage of using the spiral spacers. Those results demonstrate that spiral spacers could be an effective approach to improve energy production in MFCs.
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