Anaerobic/aerobic conditions and biostimulation for enhanced chlorophenols degradation in biocathode microbial fuel cells

被引:0
|
作者
Liping Huang
Yinghong Shi
Ning Wang
Yuesheng Dong
机构
[1] Dalian University of Technology,Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology
[2] Weihai Supervision and Inspection Institute of Product Quality,School of Life Science and Biotechnology
[3] Dalian University of Technology,undefined
来源
Biodegradation | 2014年 / 25卷
关键词
Microbial fuel cell; Biocathode; Biodegradation; Bacterial community; Stimulation; Chlorophenol;
D O I
暂无
中图分类号
学科分类号
摘要
Anaerobic/aerobic conditions affected bacterial community composition and the subsequent chlorophenols (CPs) degradation in biocathode microbial fuel cells (MFCs). Bacterial communities acclimated with either 4-chlorophenol (4-CP) or 2,4-dichlorophenol (2,4-DCP) under anaerobiosis can degrade the respective substrates more efficiently than the facultative aerobic bacterial communities. The anaerobic bacterial communities well developed with 2,4-DCP were then adapted to 2,4,6-trichlorophenol (2,4,6-TCP) and successfully stimulated for enhanced 2,4,6-TCP degradation and power generation. A 2,4,6-TCP degradation rate of 0.10 mol/m3/d and a maximum power density of 2.6 W/m3 (11.7 A/m3) were achieved, 138 and 13 % improvements, respectively compared to the controls with no stimulation. Bacterial communities developed with the specific CPs under anaerobic/aerobic conditions as well as the stimulated biofilm shared some dominant genera and also exhibited great differences. These results provide the most convincing evidence to date that anaerobic/aerobic conditions affected CPs degradation with power generation from the biocathode systems, and using deliberate substrates can stimulate the microbial consortia and be potentially feasible for the selection of an appropriate microbial community for the target substrate (e.g. 2,4,6-TCP) degradation in the biocathode MFCs.
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页码:615 / 632
页数:17
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