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This study explores the use of microbial fuel cells (MFCs) for removing groundwater contaminants like benzene, toluene, and ethylbenzene while producing electricity. The addition of acetate as a co-substrate significantly enhanced power density. The results show promise for MFCs in both contaminant removal and electricity generation.

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What they did

System
MFC

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Abstract

Abstract A microbial fuel cell (MFC) could be adopted as one of the biotechnological new approaches for removing groundwater contaminants of petroleum hydrocarbons such as benzene, toluene, and ethylbenzene, and simultaneously producing electricity. In this study, we have compared performances of single‐chamber MFCs in terms of power density and removal efficiency when operated under two different feeding conditions. In one experiment, benzene, toluene, ethylbenzene, and phenol (BTEP) were individually fed to the MFC reactor without acetate. In another experiment, acetate was added as a co‐substrate. When operated in a batch mode, both cases showed almost complete BTEP removal efficiency while the former case produced negligible power density of ca. 1 mW/m 2 and the latter case 0.13–0.44 W/m 2 . These results imply that MFCs are promising technology for removing petroleum contaminants and for simultaneously producing electricity when suitable organic substances are provided.

Key findings

  • Almost complete removal of BTEP was achieved in both feeding conditions
  • Negligible power density was produced when BTEP were fed individually without acetate
  • Power density increased to 0.13-0.44 W/m² when acetate was added as a co-substrate

Keywords

Microbial fuel cellEthylbenzeneTolueneBenzenePhenolPetrochemical

Identifiers

DOI
10.1002/bkcs.12582
Journal
Bulletin of the Korean Chemical Society
Year
2022