Zhao Yang-Guo, Zhang Yi, She Zonglian, Shi Yue, Wang Min, Gao Mengchun, Guo Liang
Key Laboratory of Marine Environment and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao, China.
College of Power and Energy Engineering, Harbin Engineering University, Harbin, China.
Environ Eng Sci. 2017 Sep 1;34(9):666-674. doi: 10.1089/ees.2016.0604.
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, spp., and beneficial helpers, spp. and 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 selected unique functional microbial populations.
在进水营养物质从乳酸盐转变为葡萄糖/乙酸盐/丙酸盐然后再变回乳酸盐的过程中，对微生物燃料电池（MFC）的性能进行了监测。同时，采用不依赖培养的分子生物技术对阳极微生物群落进行了表征。结果表明，当乳酸盐被其代谢中间产物之一乙酸盐替代时，MFC性能迅速恢复，而如果乳酸盐底物转化为葡萄糖/丙酸盐或乙酸盐再变回乳酸盐，则需要更长时间才能恢复。二次乳酸盐进料增强了在首次乳酸盐进料中占主导地位的细菌种群的富集。产电细菌、 spp.以及有益辅助菌、 spp.和 spp.，随着乳酸盐二次供应从低丰度恢复，但微生物群落在结构和组成上难以达到先前的状态。因此，当外部环境条件恢复时，微生物群落结构倾向于恢复。不同的底物选择了独特的功能性微生物种群。
