State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, China.
Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, China.
Bioresour Technol. 2014 Jul;164:270-5. doi: 10.1016/j.biortech.2014.04.098. Epub 2014 May 6.
To understand the interactions between bacterial electrode respiration and the other ambient bacterial electron acceptor reductions, alternative electron acceptors (nitrate, Fe2O3, fumarate, azo dye MB17) were added singly or multiply into Shewanella decolorationis microbial fuel cells (MFCs). All the added electron acceptors were reduced simultaneously with current generation. Adding nitrate or MB17 resulted in more rapid cell growth, higher flavin concentration and higher biofilm metabolic viability, but lower columbic efficiency (CE) and normalized energy recovery (NER) while the CE and NER were enhanced by Fe2O3 or fumarate. The added electron acceptors also significantly influenced the cyclic voltammetry profile of anode biofilm probably via altering the cytochrome c expression. The highest power density was observed in MFCs added with MB17 due to the electron shuttle role of the naphthols from MB17 reduction. The results provided important information for MFCs applied in practical environments where contains various electron acceptors.
为了理解细菌电极呼吸与其他环境细菌电子受体还原之间的相互作用，将替代电子受体（硝酸盐、Fe2O3、延胡索酸、偶氮染料 MB17）单独或组合添加到 Shewanella decolorationis 微生物燃料电池 (MFC) 中。所有添加的电子受体都与电流生成同时被还原。添加硝酸盐或 MB17 导致细胞生长更快、黄素浓度更高、生物膜代谢活力更高，但库仑效率 (CE) 和归一化能量回收 (NER) 更低，而 Fe2O3 或延胡索酸则提高了 CE 和 NER。添加的电子受体还通过改变细胞色素 c 的表达显着影响阳极生物膜的循环伏安图。由于 MB17 还原产生的萘酚的电子穿梭作用，添加 MB17 的 MFC 观察到最高的功率密度。这些结果为在含有各种电子受体的实际环境中应用 MFC 提供了重要信息。
