Generation of Power by Microbial Fuel Cell with Ferricyanide in Biodegradation of Benzene

Authors

  • Chih-Hung Wu,

    1. Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, Douliou, Yunlin, Taiwan, Republic of China
    Search for more papers by this author
  • Chi-Yung Lai,

    1. Graduate Institute of Biotechnology, National Changhua University of Education, Changhua, Taiwan, Republic of China
    Search for more papers by this author
  • Chi-Wen Lin,

    Corresponding author
    1. Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Douliou, Yunlin, Taiwan, Republic of China
    • Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, 123 University Rd. Sec. 3, Douliou, Yunlin 64002, Taiwan
    Search for more papers by this author
  • Min-Hsiu Kao

    1. Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Douliou, Yunlin, Taiwan, Republic of China
    Search for more papers by this author

Abstract

The power generation potential of a microbial fuel cell (MFC) during the process of benzene biodegradation with potassium ferricyanide (0–200 mM) as the terminal electron acceptor was evaluated. Experimental results demonstrate that benzene was used as the sole carbon source in generating electricity by a mixed culture. The power density increased from 0.0276 to 2.1 mW m−2 as the concentration of potassium ferricyanide in the cathode chamber was increased from 0 to 200 mM. With a benzene concentration of 10.87 mg L−1 and a potassium ferricyanide concentration of between 0 and 150 mM, complete degradation of benzene was achieved in 22–24.5 h. However, when the concentration of potassium ferricyanide was raised to 200 mM, the time required for complete benzene degradation was prolonged to 35 h. The results of this investigation can be used as a basis for future assessments of the power generation capacity of MFCs that are used to treat benzene-contaminated wastewater.

Ancillary