直接微生物燃料电池的影响因素

以厌氧污泥作为初始接种体,构建了一个直接微生物燃料电池,并经过160h的驯化,获得最大电压为590mV(1000Ω),并考察了不同底物和催化剂对电池性能的影响。结果表明,葡萄糖的最大功率密度(669mW/m2)要高于丁二酸的最大功率密度(235mW/m2)。通过比较电极电位,发现阳极电位随外电阻的变化较大,这主要是混合菌对不同底物的利用能力存在差异,可通过选择合适的产电菌来提高丁二酸产电的性能;并以锰作为阴极催化剂,其最大输出功率密度为147mW/m2,与铂作为阴极催化剂有一定的差距,还需进一步优化催化剂配比和制备工艺。

Influence factors of direct microbial fuel cell

A direct fuel cell was constructed by taking anaerobic activated sludge as the initial inoculums. The maximum voltage of 590 mV (1 000 Ω) was achieved after inoculating for 160 h. The effects of different substrate and catalyst on the cell performance were investigated. The results show that the maximum power density of glucose (669 mW/m~2) is larger than that of butane diacid (235 mW/m~2). In comparison with the electrode potential, the anode potential changes more as the function of external resistance, which is mainly due to a difference in the mixed strains ability of different substrates consumption, and it can choose a suitable electricigens to improve the electricity production performance of butane diacid. In addition, taking manganese as the cathode catalyst instead of platinum, the maximum output of which is 147 mW/m~2, and it has a certain gap to the result of the platinum and needs to further optimize the catalyst proportion and preparation methods.