Influence of Low Temperature on Performance of Marine Benthic Microbial Fuel Cell
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摘要: 环境温度对海泥发电(海底微生物燃料电池)具有重要影响。本文进行了4℃环境与常规室温环境(25℃)电池性能对比试验,结果表明:4℃环境下电池阳极启动时间明显慢于室温(25℃),阴极启动几乎无影响。4℃条件电池内阻(1005Ω)高于室温条件(703Ω),室温电池最大输出功率密度比4℃环境升高10mW/m2,电流密度增加46.6 mA/m2。低温环境(4℃)可导致微生物活性降低,物质扩散速度变慢,进而导致其电池性能低于室温环境。此实验对实海环境下海底微生物燃料电池设计提供了指导,具有实际意义。Abstract: Environment temperature has an important effect on the performances of marine microbial fuel cell (BMFC).A comparison test has been conducted on the performances of the BMFC at 4 ℃ and room temperature (25 ℃).The results show that startup time of anode at 4 ℃ is significantly slower than that at room temperature (25 ℃), while the temperature has no effect on cathode startup time.At room temperature, the cell internal resistance is 703 Ω, but at 4 ℃, is 1005 Ω, increment 302 Ω, meanwhile the maximum output power density and current density at room temperature increases about 10 mW/m2 and 46.6mA/m2 respectively than that at 4 ℃.The poor performance of BMFC at low temperature may be due to lower microbial activity and mass diffusion velocity at lower temperature.This experiment provides guidance for design of BMFC and is practically significant for application.
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