2019 Volume 27 Issue 1 Pages 102-107
We fabricated a microbial fuel cell (MFC) which was composed of three parts: a piece of towel paper for membrane, an anode electrode with photosynthetic bacteria biofilm and a cathode electrode coated potassium ferricyanide. The MFC could generate electricity with 20 μl water adding to the dry biofilm anode for activation. We measured repeatedly electricity generation every week using the MFC. This paper studies three points: (1) the dry-surface biofilms of Purple photosynthetic bacteria can generate electricity when activated by water; (2) the bacteria can survive in the condition of dry-surface biofilms for several weeks; (3) carbon nanotube (CNT) improves the performance of the electrodes. As a result, the MFC generated the maximum power density and current density of 2.90 µW/cm2 and 24.1 µA/cm2, respectively.
