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The study investigates the effect of chemically synthesized activated carbon on the performance of microbial fuel cells, finding that AC coating increases power density and COD removal efficiency.

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Reported parameters

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Coulombic efficiency74.8%

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What they did

System
MFC

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Abstract

The effect of chemically synthesized activated carbon (AC) on the performance of microbial fuel cell (MFC) was investigated in this study. Coconut fiber was used as a source material for synthesizing the AC. The AC with different ranges (5, 10, and 15 mg/cm²) was coated on the anode electrode surface to investigate and compare the performance of MFC with the control electrode (plain surface). The experimental results showed that the AC-5 (5 mg/cm²) coated electrode produced a peak power density (5.8 W/m³) which was higher than the control (plain) electrode (3.8 W/m³). The MFC performance in terms of power density and chemical oxygen demand (COD) removal efficiency was increased with increasing loading quantity of AC. When an AC-15 (15 mg/cm²) coated was electrode used in the MFC, the highest power density of 9.5 W/m³ with a COD removal efficiency of 74.8% was observed. Cyclic voltammetry analysis visualized the clear enhancement in electrochemical activity with an AC coated electrode. The effect of wastewater COD concentration on the performance was also investigated. The AC derived from coconut fibers can be considered as a biocompatible material to enhance MFC performance.

Key findings

  • AC-5 coated electrode produced a peak power density of 5.8 W/m³, higher than the control electrode (3.8 W/m³).
  • Increasing AC loading quantity increased MFC performance in terms of power density and COD removal efficiency.
  • AC-15 coated electrode achieved a highest power density of 9.5 W/m³ with a COD removal efficiency of 74.8%.

Keywords

Microbial fuel cellElectrodeAnodeCyclic voltammetryActivated carbonChemical oxygen demand

Identifiers

DOI
10.1063/1.4955110
Journal
Journal of Renewable and Sustainable Energy
Year
2016