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Performance of pig slurry based microbial fuel cell during energy recovery and waste treatment

Desalination and Water Treatment, ISSN: 1944-3986, Vol: 64, Page: 31-39
2017
  • 6
    Citations
  • 0
    Usage
  • 21
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    6
    • Citation Indexes
      5
    • Policy Citations
      1
      • Policy Citation
        1
  • Captures
    21

Article Description

The performance of two single-chamber air cathode microbial fuel cells (MFCs) fed with pig slurry (MFC1) and synthetic wastewater (MFC2) were studied for energy recovery and waste treatment by applying three different flow recirculation (mixing intensities). The flow recirculation in the MFCs was an important factor on the performance of the MFCs. During pig slurry treatment, the maximum power density was 27.7 mW m –2 without flow recirculation. The highest removal of chemical oxygen demand (COD) (89.8%), ammoniacal nitrogen (NH 4 -N) (78.2%), total phosphorus (TP) (36.3%), and total suspended solids (TSS) (95%) were achieved under 74 mL min –1 of flow recirculation. In order to compare the electricity production in the MFC fed with pig slurry, one MFC was fed with synthetic wastewater. Lower power densities were obtained using synthetic wastewater (0.5–3.8 mW m –2 ). The maximum removal of COD, NH 4 -N, TP, and TSS during synthetic wastewater treatment was obtained applying at a flow recirculation of 152 mL min –1. The SEM image and EDX spectrum in cation-exchange membrane from MFC1, showed the presence of struvite on membrane surface. In MFC2, the calcium (Ca) and phosphorus (P) ions in form of calcium phosphate salt were detected on membrane surface. The presence of Ca, magnesium (Mg), and P ions precipitated on membrane surface was reduced by applying the highest flow recirculation in both MFCs.

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