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Researchers used oil palm empty fruit bunch (OPEFB) as an alternative anode material in a microbial fuel cell (MFC) system, achieving higher current density and chemical oxygen demand (COD) reduction compared to conventional carbon cloth anode.

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What they did

System
MFC

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Abstract

Abstract Microbial fuel cell (MFC) has emerged as one of the potential technologies for sustainable bioelectrical energy recovery and reduction of recalcitrant wastes. The MFC performance is greatly influenced by the anode materials which serve as the support for exoelectrogenic bacteria attachment. In this study, oil palm empty fruit bunch (OPEFB) is proposed as an alternative anode material prepared via a direct carbonization process using tube furnace owing to its good conductivity property. The carbonization process was conducted under nitrogen gas flow at 900°C with a constant heating rate of 5°C/min. The anode was prepared by mixing the carbonized OPEFB with polytetrafluoroethylene (PTFE) binder. When used in MFC, the OPEFB-anode generated a maximum current density of 97.30 mA/m 2 , which is comparatively higher than that of the conventional carbon cloth anode (76.24 mA/m 2 ). Our MFC system had also resulted considerable chemical oxygen demand (COD) and 2-chlorophenol reductions of 77% and 75%, respectively. This study could support future research on freely-available OPEFB materials for high performance MFC anode.

Key findings

  • Maximum current density of 97.30 mA/m² achieved with OPEFB-anode
  • 77% COD reduction in MFC system
  • 75% 2-chlorophenol reduction in MFC system

Keywords

Microbial fuel cellAnodeCarbonizationChemical engineeringCarbon fibersChemical oxygen demand

Identifiers

DOI
10.1088/1755-1315/765/1/012096
Journal
IOP Conference Series: Earth and Environmental Science
Year
2021