外加直流电场对微生物燃料电池阳极微生物的影响研究

为考察外加直流电场作用对微生物燃料电池阳极微生物的影响,采用双室型MFC反应器,在启动开始时分别加以-5,-3,-1,0,+1,+3,+5 V的直流电场,作用时间依次取2 min,30 min,1 h,24 h。结果表明,外加直流电场能够对微生物燃料电池阳极室内微生物的生长产生影响,作用时间为30 min时效果较为明显,提高作用时间后效果变化不大;±1 V的电场强度作用促进微生物的生长;较低的直流电场(±1 V)作用能够促进微生物燃料电池的阳极生物挂膜,且负电场促进效果更好,而较高的直流电场(+3 V和±5 V)作用不利于甚至损害阳极生物挂膜。

Research on the anode bacterials of Microbial Fuel Cell Effcted by DC electric field

To study the effction of anode microorganisms of microbial fuel cell by impressed DC electric field,two-chamber MFCs reactor were installed in the research.The MFCs were effected by DC electric field of-5,-3,-1,0,+1,+3,+5 V respectively after they were started and effective time were 2 min,30 min,1 h and 24 h.The results showed that impressed DC electric field effect the anode microorganisms of microbial fuel cell,30 min had remarkable effects.Delayed the effective time can not change the result obviously.DC electric field of ±1 V can accelerate the growth of microorganisms.Microorganisms growing on the anode were accelerated by lower DC electric field(±1 V) and negative electric field much better.Higher DC electric field(+3 V and ±5 V) was not advantageous to growth of microorganisms,even killed it.