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Vol. 25 No. 8 (2013): Vol 25 Issue 8

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Influence of Coulombic Efficiency in Air-Cathode Microbial Fuel Cell by Temperature and Baffle-microfiltration Membrane Barrier

https://doi.org/10.14233/ajchem.2013.13570
Chao Li
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Libin Zhang
StatState Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. Chinae Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Ming Xu
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Lili Ding
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Ke Xu
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Jinju Geng
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China
Hongqiang Ren
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, Jiangsu, P.R. China

Corresponding Author(s) : Hongqiang Ren

hqren@nju.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 8 (2013): Vol 25 Issue 8

Abstract

Coulombic efficiency is an important measurement of energy recovery, which is very low in the air-cathode microbial fuel cell. Temperature variation and baffle-microfiltration membrane barrier installation were performed to investigate the effect on coulombic efficiency of air-chamber microbial fuel cell. The results under three temperature stages (28-32 ºC, 16-20 ºC and 6-12 ºC) showed that coulombic efficiency can be increased by lowering operating temperature appropriately as a price for power generation loss, however, decreased seriously under excessively low temperature. The baffle-microfiltration membrane barrier trapped bacteria in the bottom part near anode, avoided the contact between bacteria and substrate in the top part with high oxygen concentration near cathode, which can decrease the loss of substrate for aerobic respiration and effectively increase coulombic efficiency from 4.5 % (control) to 9.9 %, without obvious reduction in power generation. Furthermore, the reformed reactor even showed higher performance than the control at the higher initial COD concentration range.

Keywords

Microbial fuel cell Coulombic efficiency Temperature Baffle Microfiltration membrane
Li, C., Zhang, L., Xu, M., Ding, L., Xu, K., Geng, J., & Ren, H. (2013). Influence of Coulombic Efficiency in Air-Cathode Microbial Fuel Cell by Temperature and Baffle-microfiltration Membrane Barrier. Asian Journal of Chemistry, 25(8), 4165–4170. https://doi.org/10.14233/ajchem.2013.13570
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