单室直接微生物燃料电池性能影响因素分析

Analysis of influencing factors on the performance of single chamber direct microbial fuel cell

利用构建的单室微生物燃料电池,进行了阴极板中铁离子浓度、阳极底物、底物浓度及阳极板面积对单室直接微生物燃料电池性能影响的研究.结果表明:在其它条件相同的情况下,随着阴极电极板中Fe3+含量的增加,电池负载输出电压随之提高;不同底物的阳极反应,随着产生的电子和质子数的提高,电量随之增大;输出电压亦随底物浓度的增加而提高,但底物葡萄糖的浓度饱和值为0.72g/L;增加阳极板数量加大阳极比表面积,更多的微生物吸附在阳极电极上传递电子,电池输出电压与阳极板数量不成倍数关系.此研究为单室微生物燃料电池的应用提供了理论依据.

Some factors affecting single chamber direct microbial fuel cell performance such as iron concentration in the cathode electrode,substrates in anode chamber,substrate concentration and anode electrode area were studied with a single chamber direct microbial fuel cell.It was proved that the load voltage increased with the Fe3+ concentration increasing under the same conditions.Electricity was enhanced as more electrons and protons were released during anode chamber reaction for the different substrates.The load voltage was also grown with the increase of the substrate concentration,but the saturation value of the substrate concentration was 0.72 g·L-1.The more Rhodoferax ferrireducens absorbed on the surface anode electrodes to transport the more electrons,and the load voltage was not multiple of the number of anode electrode.This study provided scientific base for the application of the single chamber direct microbial fuel cell.