A microbial fuel cell is a system that harvests electrons produced during microbial metabolism and channels them for electric current production.
A microbe, Rhodoferax ferrireducens strain T118T , has been isolated from anoxic subsurface sediments. It is an iron reducing microbe that can completely oxidize glucose to carbon dioxide with Fe(111) serving as the sole electron acceptor. R. ferrireducens metabolizes and produces current, from sugars such as glucose, fructose, sucrose and xylose. Microbial fuel cells can be connected in series and current production remain steady for days.