【摘要】 通过构建单室型微生物燃料电池,比较了以1 000 mg/L葡萄糖为单一燃料和100 mg/L苯酚+1 000mg/L葡萄糖混合时MFC的产电性能及阳极生物膜形态.结果表明,当以葡萄糖为单一燃料时,最大输出电压为486m V,对应的库伦效率和最大功率密度为30.54%和332.35 mW·m^-2,COD去除率为90.97%.混合燃料时出现先升高再降低的趋势,体积比为50∶50时,最大输出电压为381 m V,库伦效率和功率密度为34.75%和204.26 mW·m^-2,COD去除率为88.34%.通过对SEM的分析推断在链球菌为降解葡萄糖的优势菌群,短杆菌则为降解苯酚的主要微生物,其数量多少与产电性能有直接影响.实验说明,苯酚可以作为MFC的底物产电,能被MFC中的产电混合菌有效降解.更多还原

【Abstract】 By constructing a single chamber microbial fuel cell, the effect of phenol degradation and simultaneous electricity generation using glucose or a glucose-phenol mixture as the fuel was tested. The morphology of MFC anode biofilm under different experiment conditions was observed using SEM. During this study, when 1 000 mg/L glucose was used as the only substrate, MFC could work well with a maximal output voltage of 486 m V, corresponding coulomb efficiency and area power density were 30.54% and332.35 mW·m^-2 respectively. And COD removal was 90.97%. While the volume ratio of phenol and glucose was 50∶50, maximal output voltage reached 381 mV, corresponding coulomb efficiency and area power density were 34.75% and 204.26 mW·m^-2 respectively, COD removal efficiency was 88.34%. According to the analysis of SEM, it is concluded that Streptococcus and Brevibacterium are probably the predominant group on the surface of the anode with glucose and phenol as the substrate, and its number may have a direct impact on the electrical performance. The results indicated that phenol could be used in the MFC for generating power and at the same time accomplishing biodegradation effectively.更多还原