摘要
微生物燃料电池(microbial fuel cell,MFC)的启动时间较长是制约其发展的重要因素。为探究不同启动条件对MFC启动时间及性能的影响,本文控制基质的更换时机和菌种的回收次数,全程记录了电压的变化情况,并通过极化曲线和功率密度曲线分析了电化学活性。结果表明:MFC启动阶段,菌种多次回收和维持基质营养充足可以提高MFC的启动速度。电压下降10%更换基质条件下启动的MFC相比待电压下降至100mV后更换基质条件下启动的MFC,启动时间更快,可获得的最大稳定电压高16%~18%,且有更强的电化学活性。
One of the most important factors restricting the development of microbial fuel cell(MFC)is the long start-up time.In order to explore the effects of different start-up conditions on start-up time and performance of MFC,two factors are controlled which are the replacement timing of the substrate and the number of times of recovery of the bacteria.The change of voltage is recorded and the polarization curve and power density curve are measured.The results showed that the multiple times of strains recycling and sufficient nutrition can improve start-up speed of MFC.A MFC with faster start-up speed,more than 16%-18% of the maximum stable voltage and stronger electrochemical activity can be obtained on the condition that replacing the nutrition substrate when voltage drop by 10% compared with replacing it when voltage drop to 100 mV.
出处
《环保科技》
2017年第6期21-24,共4页
Environmental Protection and Technology
关键词
微生物燃料电池
菌种浓度
营养基质浓度
功率密度
内阻
microbial fuel cell
bacterial concentration
concentration of nutrient matrix
power density
internal resistance
