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Decolorization of azo dye and generation of electricity by microbial fuel cell with laccase-producing white-rot fungus on cathode

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  • Lai, Chi-Yung
  • Wu, Chih-Hung
  • Meng, Chui-Ting
  • Lin, Chi-Wen

Abstract

Wood-degrading white-rot fungi produce many extracellular enzymes, including the multi-copper oxidative enzyme laccase (EC 1.10.3.2). Laccase uses atmospheric oxygen as the electron acceptor to catalyze a one-electron oxidation reaction of phenolic compounds and therefore has the potential to simultaneously act as a cathode catalyst in a microbial fuel cell (MFC) and degrade azo dye pollutants. In this study, the laccase-producing white-rot fungus Ganoderma lucidum BCRC 36123 was planted on the cathode surface of a single-chamber MFC to degrade the azo dye acid orange 7 (AO7) synergistically with an anaerobic microbial community in the anode chamber. In a batch culture, the fungus used AO7 as the sole carbon source and produced laccase continuously, reaching a maximum activity of 20.3±0.3 U/L on day 19 with a 77% decolorization of the dye (50mg/L). During MFC operations, AO7 in the anolyte diffused across a layer of polyvinyl alcohol-hydrogel that separated the cathode membrane from the anode chamber, and served as a carbon source to support the growth of, and production of laccase by, the fungal mycelium that was planted on the cathode. In such MFCs, laccase-producing fungal cathodes outperformed laccase-free controls, yielding a maximum open-circuit voltage of 821mV, a closed-circuit voltage of 394mV with an external resistance of 1000Ω, a maximum power density of 13.38mW/m2, a maximum current density of 33mA/m2, and a >90% decolorization of AO7. This study demonstrates the feasibility of growing a white-rot fungal culture with continuous laccase production on the cathode of MFCs to improve their electricity generation and azo dye removal efficiency.

Suggested Citation

  • Lai, Chi-Yung & Wu, Chih-Hung & Meng, Chui-Ting & Lin, Chi-Wen, 2017. "Decolorization of azo dye and generation of electricity by microbial fuel cell with laccase-producing white-rot fungus on cathode," Applied Energy, Elsevier, vol. 188(C), pages 392-398.
  • Handle: RePEc:eee:appene:v:188:y:2017:i:c:p:392-398
    DOI: 10.1016/j.apenergy.2016.12.044
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    References listed on IDEAS

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    1. Wu, Chao & Liu, Xian-Wei & Li, Wen-Wei & Sheng, Guo-Ping & Zang, Guo-Long & Cheng, Yuan-Yuan & Shen, Nan & Yang, Yi-Pei & Yu, Han-Qing, 2012. "A white-rot fungus is used as a biocathode to improve electricity production of a microbial fuel cell," Applied Energy, Elsevier, vol. 98(C), pages 594-596.
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    Cited by:

    1. Anna Sekrecka-Belniak & Renata Toczyłowska-Mamińska, 2018. "Fungi-Based Microbial Fuel Cells," Energies, MDPI, vol. 11(10), pages 1-18, October.
    2. Christwardana, Marcelinus & Frattini, Domenico & Accardo, Grazia & Yoon, Sung Pil & Kwon, Yongchai, 2018. "Early-stage performance evaluation of flowing microbial fuel cells using chemically treated carbon felt and yeast biocatalyst," Applied Energy, Elsevier, vol. 222(C), pages 369-382.
    3. Christwardana, Marcelinus & Frattini, Domenico & Duarte, Kimberley D.Z. & Accardo, Grazia & Kwon, Yongchai, 2019. "Carbon felt molecular modification and biofilm augmentation via quorum sensing approach in yeast-based microbial fuel cells," Applied Energy, Elsevier, vol. 238(C), pages 239-248.
    4. Liu, Shu-Hui & Lai, Yu-Chuan & Lin, Chi-Wen, 2019. "Enhancement of power generation by microbial fuel cells in treating toluene-contaminated groundwater: Developments of composite anodes with various compositions," Applied Energy, Elsevier, vol. 233, pages 922-929.
    5. Asiah Sukri & Raihan Othman & Firdaus Abd-Wahab & Noraini M. Noor, 2021. "Self-Sustaining Bioelectrochemical Cell from Fungal Degradation of Lignin-Rich Agrowaste," Energies, MDPI, vol. 14(8), pages 1-11, April.

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