Performance analysis of microbial fuel cells with different exoelectrogens at low temperature

摘要

The aim of the study is to compare different kinds of microbial species for electricity production in the microbial fuel cells (MFCs) at low temperature. Experiments were conducted with single-chambered MFCs and medium anode inoculated with pure culture from activated sludge. Three kinds of exoelectrogens including Klebsiella sp. ALL-1, Shewanella sp. ALL-2 and Enterobacter sp. ALL-3 were used for evaluating their electricity activity. After adding solution into MFCs, the power of density grew from 50 mV to over 530 mV, and finally maintained at about 520+10 mV during the complete cycles. The results showed that MFCs with Enterobacter sp. ALL-3 had higher power and current density, shorter and more stable working circle at same level of voltage producing than other kinds of exoelectrogens. These characteristics made Enterobacter sp. ALL-3 as optimum exoelectrogen for electricity production at low temperature.