Abstract Performance of microbial fuel cells (MFCs) was monitored during the influent nutrient change from lactate to glucose/acetate/propionate and then to lactate. Meanwhile, anodic microbial communities were characterized by culture-independent molecular biotechnologies. Results showed MFC performance recovered rapidly when the lactate was replaced by one of its metabolic intermediates acetate, while it needed a longer time to recover if lactate substrate was converted to glucose/propionate or acetate to lactate. Secondary lactate feed enhanced the enrichment of bacterial populations dominating in first lactate feed. Electricity-producing bacteria, Geobacter spp., and beneficial helpers, Anaeromusa spp. and Pseudomonas spp., revived from a low abundance as lactate secondary supply, but microbial communities were hard to achieve former profiles in structure and composition. Hence, microbial community profiles tended to recover when outside environmental condition were restored. Different substrates sele...

中文翻译：

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底物转化对微生物燃料电池和阳极微生物群落性能的影响

摘要 微生物燃料电池 (MFC) 的性能在进水养分从乳酸盐变为葡萄糖/乙酸盐/丙酸盐再到乳酸盐的过程中进行了监测。同时，阳极微生物群落的特点是与培养无关的分子生物技术。结果表明，当乳酸被其中一种代谢中间体醋酸盐取代时，MFC 性能迅速恢复，而如果乳酸底物转化为葡萄糖/丙酸盐或醋酸盐转化为乳酸，则需要更长的时间来恢复。二级乳酸饲料增强了在一级乳酸饲料中占主导地位的细菌种群的富集。发电细菌 Geobacter spp. 和有益的助手 Anaeromusa spp。和假单胞菌属（Pseudomonas spp.），作为乳酸次要供应，从低丰度中复苏，但是微生物群落很难在结构和组成上达到以前的概况。因此，当外部环境条件恢复时，微生物群落概况往往会恢复。不同基材选择...