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阳极材料是影响微生物燃料电池实用化的关键因素之一.本文以碳刷、碳布或石墨毡阳极和泡沫镍空气阴极制成紧凑式6 L单室双空气阴极微生物燃料电池(MFC),研究不同阳极材料对电池启动过程和运行以乙酸钠为基质的人工废水和实际屠宰废水的产电性能和废水处理效果的影响,比较了单位阳极成本的产电效益.结果表明:阳极材料对紧凑式MFC的启动过程没有明显影响;在产电性能方面,碳刷阳极MFC在人工废水和屠宰废水中的输出功率密度最高,分别为(56.3±1.8)W·m~(-3)和(19.5±0.8)W·m~(-3),其次为碳布阳极MFC,分别为(46.0±1.7)W·m~(-3)和(16.9±0.6)W·m~(-3),最差的是石墨毡阳极MFC,分别为(40.8±1.5)W·m~(-3)和(11.9±0.5)W·m~(-3);在废水处理效果方面,不同阳极MFC在运行人工废水或屠宰废水时COD去除率没有明显差别,均在90%左右.碳刷阳极MFC所产生的经济效益最高,在运行乙酸钠和屠宰废水时分别为(3.44±0.08)m W·元-1和(0.97±0.05)m W·元-1,分别比碳布MFC和石墨毡MFC高18.6%、12.8%和38.7%、80%.本研究结果说明碳刷是微生物燃料电池实用化过程中最合适的阳极材料.
Anode material is one of the key factors that affect the practical use of microbial fuel cells.In this paper, a compact 6 L single-chamber dual-air cathode microbial fuel cell (MFC) was fabricated by carbon brush, carbon cloth or graphite felt anode and foam nickel air cathode. The effects of different anode materials on the battery start-up process and the operation of sodium acetate-based artificial wastewater and actual slaughter wastewater on the electricity generation performance and wastewater treatment effect were compared, and the power generation benefit of unit anode cost was compared. The results showed that: MFC’s startup process had no significant effect. In terms of power generation performance, the output power density of MFC with MFC in waste water and slaughterhouse was (56.3 ± 1.8) W · m -3 and (19.5 ± 0.8) W · m ~ (-3), followed by carbon cloth anode MFC (46.0 ± 1.7) W · m ~ (-3) and (16.9 ± 0.6) W · m ~ (40.8 ± 1.5) W · m ~ (-3) and (11.9 ± 0.5) W · m ~ (-3), respectively. In the aspect of wastewater treatment effect, different anode MFCs were operated in artificial wastewater Or slaughterhouse wastewater COD removal rate no significant difference, are about 90%. Carbon brush anode MFC has the highest economic benefits, the operation of sodium acetate and slaughterhouse wastewater (3.44 ± 0.08) m W · yuan -1 and (0.97 ± 0.05) m W · yuan -1 respectively, which were respectively 18.6%, 12.8% and 38.7% and 80% higher than that of carbon cloth MFC and graphite felt MFC respectively The results show that carbon brush is the most suitable anode material in the practical application of microbial fuel cells.