Acetate and electricity generation from methane in conductive fiber membrane- microbial fuel cells

作者：Bai, Ya-Nan; Zhang, Fang; Yu, Lin-Peng; Zhang, Ya-Li; Wu, Yun; Lau, Tai-Chu; Zhao, He-Ping; Zeng, Raymond J.^*

来源：Science of the Total Environment, 2022, 804: 150147.

DOI：10.1016/j.scitotenv.2021.150147

• Methane conversion
• Electricity generation
• Acetate
• Microbial fuel cells (MFCs)
• Microbial community

Microbial conversion of methane to electricity, fuels, and liquid chemicals has attracted much attention. How-ever, due to the low solubility of methane, it is not considered a suitable substrate for microbial fuel cells (MFCs). In this study, a conductive fiber membrane (CFM) module was constructed as the bioanode of methane-driven MFCs, directly delivering methane. After biofilm formation on the CFM surface, a steady voltage output of 0.6 to 0.7 V was recorded, and the CFM-MFCs obtained a maximum power density of 64 +/- 2 mW/m(2). Moreover, methane oxidation produced a high concentration of intermediate acetate (up to 7.1 mM). High-throughput 16S rRNA gene sequencing suggests that the microbial community was significantly changed after electricity generation. Methane-related archaea formed a symbiotic consortium with characterized electroactive bacteria and fermentative bacteria, suggesting a combination of three types of microorganisms for methane con-version into acetate and electricity.

• 单位
  中国科学院; 福建农林大学; 浙江大学