Research on the Microbial Fuel Cell Stimulated by DC Electric Field

To study the properties of MFC stimulated by DC electric field. Seven identical two-chamber MFCs were constructed in this study. The MFCs were stimulated by DC electric field of ±5V, ±3V, ±1V and 0V respectively after they were started at 12h, 48h and 84h. And every stimulation under 30 minutes. The results showed that the start-up time was shortened by lower DC electric field(±1V) and the electrochemical properties were improved. The start-up time was delayed by higher positive DC electric field(+3V, +5V) and the electrochemical properties were damaged. The start-up time was shortened by higher negative DC electric field(-3V, -5V), but the electrochemical properties were damaged. It is proved that lower external DC electric field can be used to short the start-up time and improve the properties of MFC.