Portal de Periódicos da CAPES

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

2021; Elsevier BV; Volume: 804; Linguagem: Inglês

10.1016/j.scitotenv.2021.150147

1879-1026

Yanan Bai, Fang Zhang, Linpeng Yu, Yali Zhang, Yun Wu, Tai‐Chu Lau, He‐Ping Zhao, Raymond Jianxiong Zeng,

Anaerobic Digestion and Biogas Production

Microbial conversion of methane to electricity, fuels, and liquid chemicals has attracted much attention. However, 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/m2. 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 conversion into acetate and electricity.