High Power Generation by a Strain of Facultative Anaerobe in Double-chamber Microbial Fuel Cell

摘要

Microbial Fuel Cells (MFCs) are systems that can convert chemical energy into electrical energy by biological oxidation, current effort to improve the power output is limited by the lack of knowledge about the electrochemical activity bacteria and few researches were on the power generation mechanisms of pure strains. In this study, the exoelectrogenic （"exo" for exocellular）bacterium staphylococcus NUST-1 was directly isolated from the MFC, which was stably run for 90 days. Cyclic Voltammetry (CV) indicated that temporary mediator produced by NUST-1 may take the work of transferring electron. A new built double-chamber MFC was inoculated with pure NUST-1, and after 40 days enrichment, the system produced 520mW/m~2 power density and the highest open circuit voltage (OCV) reached to 616mV, the power output was higher than most of the single-strain MFCs reported.