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Carbon Felt Composite Electrode Plates Promote Methanogenesis through Microbial Electrolytic Cells

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  • Qi Wu

    (School of Mechanical Engineering, Tongji University, Shanghai 201804, China
    Bio-Energy Research Center, Institute of New Rural Development, Tongji University, Shanghai 201804, China)

  • Han Xiao

    (School of Mechanical Engineering, Tongji University, Shanghai 201804, China
    Bio-Energy Research Center, Institute of New Rural Development, Tongji University, Shanghai 201804, China)

  • Hongguang Zhu

    (School of Mechanical Engineering, Tongji University, Shanghai 201804, China
    Bio-Energy Research Center, Institute of New Rural Development, Tongji University, Shanghai 201804, China)

  • Fanghui Pan

    (School of Mechanical Engineering, Tongji University, Shanghai 201804, China
    Bio-Energy Research Center, Institute of New Rural Development, Tongji University, Shanghai 201804, China)

  • Fulu Lu

    (School of Mechanical Engineering, Tongji University, Shanghai 201804, China
    Bio-Energy Research Center, Institute of New Rural Development, Tongji University, Shanghai 201804, China)

Abstract

Bioelectrochemical systems are widely used in waste utilization processes. Among them, anaerobic digestion (AD) and microbial electrolytic cell coupling (MEC) are cost-effective and efficient waste-to-energy technologies. In this study, the proposal was made that a carbon felt composite electrode plate be applied to an AD-MEC reactor. The control experiment was conducted using an AD reactor (without the external power supply). The result shows that the carbon felt composite electrode plate increased the biogas production of the AD-MEC reactor by 15.4%, and the average methane content increased by 9.49% compared to the control AD reactor. The total methane production of the AD-MEC reactor and control reactor was 302.51 and 407.79 mL, respectively. The total methane production of the AD-MEC reactor was 34.8% higher than the control group. In addition, the authors found that Methanosarcina and Methanosaeta activities in the AD-MEC reactor were significantly increased. The carbon felt composite electrode plate applied in AD-MEC may have promoted the methanogenic microorganisms’ interspecific acetic acid transport process and increased biogas production and methane content.

Suggested Citation

  • Qi Wu & Han Xiao & Hongguang Zhu & Fanghui Pan & Fulu Lu, 2023. "Carbon Felt Composite Electrode Plates Promote Methanogenesis through Microbial Electrolytic Cells," Energies, MDPI, vol. 16(11), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4416-:d:1159731
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    References listed on IDEAS

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    1. Yuan, Haiping & Chen, Ying & Dai, Xiaohu & Zhu, Nanwen, 2016. "Kinetics and microbial community analysis of sludge anaerobic digestion based on Micro-direct current treatment under different initial pH values," Energy, Elsevier, vol. 116(P1), pages 677-686.
    2. Qu, Guangfei & Lv, Pei & Cai, Yingying & Tu, Can & Ma, Xi & Ning, Ping, 2020. "Enhanced anaerobic fermentation of dairy manure by microelectrolysis in electric and magnetic fields," Renewable Energy, Elsevier, vol. 146(C), pages 2758-2765.
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