Electricity generation and microbial community in response to short-term changes in stack connection of self-stacked submersible microbial fuel cell powered by glycerol

WATER RESEARCH

卷:109

Article

Zhao, Nannan¹  Angelidaki, Irini¹  Zhang, Yifeng¹ 

[1] Tech Univ Denmark, Dept Environm Engn, DK-2800 Lyngby, Denmark

关键词: Self-stacked submersible microbial fuel cell;    Stack operation;    Glycerol;    Series connection;    Parallel connection;    Microbial community;   

DOI  :  10.1016/j.watres.2016.11.064

来源: Elsevier

【 摘 要 】

Stack connection (i.e., in series or parallel) of microbial fuel cell (MFC) is an efficient way to boost the power output for practical application. However, there is little information available on short-term changes in stack connection and its effect on the electricity generation and microbial community. In this study, a self-stacked submersible microbial fuel cell (SSMFC) powered by glycerol was tested to elucidate this important issue. In series connection, the maximum voltage output reached to 1.15 V, while maximum current density was 5.73 mA in parallel. In both connections, the maximum power density increased with the initial glycerol concentration. However, the glycerol degradation was even faster in parallel connection. When the SSMFC was shifted from series to parallel connection, the reactor reached to a stable power output without any lag phase. Meanwhile, the anodic microbial community compositions were nearly stable. Comparatively, after changing parallel to series connection, there was a lag period for the system to get stable again and the microbial community compositions became greatly different. This study is the first attempt to elucidate the influence of short-term changes in connection on the performance of MFC stack, and could provide insight to the practical utilization of MFC. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free