阳极材料对生物阴极型微生物燃料电池产电性能影响研究

POWER GENERATION PERFORMANCE OF BIO-CATHODE MICROBIAL FUEL CELL WITH DIFFERENT ANODE MATERIALS

实验以碳刷、活性炭、石墨、碳毡为阳极材料,采用双室生物阴极型MFC对乙酸钠废水进行处理,对比了4种材料对MFC的启动、产电性能、内阻和水质处理效果的影响。结果表明,当底物浓度为1 000 mg/L,外电阻为500Ω时,以活性炭为阳极的MFC启动最快,在稳定阶段的产电性能和水质处理效果在4个MFC中均是最好的,其最大功率密度为324.2 m W/m2,COD去除率达到90%以上。在长期运行后,以活性炭、石墨、碳毡为阳极的MFC产电能力和水质处理效果均出现下降趋势,只有以碳刷为阳极的MFC能够保持较稳定的产电能力和水质处理效果。

Sodium acetic acid wastewater was treated by double chamber type of biological cathode MFC, the anode materials of which were carbon brush, activated carbon, graphite and carbon felt respectively. The influence of four kinds of materials above on the start of the MFC, as well as other factors such as power generation, internal resistance and water quality treatment effect were studied. Results showed that the MFC used activated carbon as the anode started fastest when the concentration of the substrate was 1 000 mg/L and the external resistance was 500 Ω Moreover, the power generation and water treatment effects of the MFC used activated carbon were optimal among the four MFC at stable phases, with the maximum power density of 324.2 mW/m^2 and the COD removal efficiency reached above 90%. After long-term running, the producing electrical properties and water treatment effects of the MFC used activated carbon, graphite and carbon felt as the anode had a downward trend, while that of the MFC used carbon brush as the anode maintained stable.