关键词: 微生物燃料电池, 燃料电池, 废水, 温度

Abstract: Taking anaerobic bacteria from domestic waste water as biocatalyst，glucose as fuel，a double-chamber microbial fuel cell (MFC) was constructed. The battery was operated for 5 cycles intermittently.The effect of temperature on its producing electricity characteristics was investigated by electrochemical test methods，including cyclic voltammogram，alternating current impedance and polarization test. In a specific temperature range，electrochemical activity of the microbe improved with increasing temperature，power density and exchange current density were enhanced，while charge transfer impedance decreased. At 32 ℃ the battery showed the best performance. Power density and exchange current density reached 156.2 mW/m2 and 8.02×10?5 mA/m2 at 32 ℃，respectively. However，it was not beneficial to bacterial activity at a too low or too high temperature. When the temperature of the battery was at 18 ℃，25 ℃，32 ℃，39 ℃ and 46 ℃，the percentages of load transfer resistance in anode resistance were 97.99%，84.02%，47.36%，91.30% and 99.61%，respectively. It demonstrated that charge transfer impedance occupied the overwhelming share of total resistance at the anode. MFC was an electrochemical system under the control of charge transfer process.

Key words: microbial fuel cell (MFC), fuel cell, wastewater, temperature