阳极初始电势对微生物燃料电池产电的影响  

Effect of the Initial Anode Potential on Electricity Generation in Microbial Fuel Cell

作　　者：范明志[1] 梁鹏[1] 曹效鑫[1] 黄霞[1] 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点实验室,北京100084

出　　处：《环境科学》2008年第1期263-267,共5页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2006AA062329);国家自然科学基金项目(20577027)

摘　　要：在微生物燃料电池中,阳极电势会对产电菌的富集和生长产生影响.为进一步明确阳极电势的作用,确定适合微生物生长的最佳阳极电势,在微生物燃料电池的阳极室中设置附加电路以改变阳极的初始电势,考察阳极初始电势对产电微生物的影响.将阳极初始电势设为350 mV时,产电微生物的生长明显变慢.而阳极初始电势为-200 mV和200 mV时,微生物的生长速度基本相同.稳定运行后,阳极初始电势分别为3502、00和-200 mV的微生物燃料电池,阳极内阻分别为71、43和80Ω.通过变性梯度凝胶电泳(DGGE)分析微生物燃料电池稳定产电前后阳极微生物群落结构,虽然3个微生物燃料电池的阳极初始电势不同,但稳定后微生物群落结构相似,Clostridium sticklandii、Pseudomonas mendocina、Paenibacillus taejonensis在阳极的富集量最多,MFC对这3种细菌的强化富集作用最明显.The initial anode potential of the microbial fuel cell （MFC） was changed by additional circuit in the anode chamber, and the influence of the initial anode potential on the electricigens was studied. When the initial anode potential was 350 mV （ vs Hg/Hg2Cl2 ）, the growth of microorganisms was much slower than that of the microorganisms which grew on the anode with an initial potential of- 200 mV or 200 mV （vs Hg/Hg2Cl2 ）. After stable electricity generation, the anode resistances of the three MFCs, which had initial anode potentials of 350 mV, 200 mV and - 200 mV respectively, were 71 Ω, 43 Ω and 80 Ω. The community structures in MFCs, before and after the electricity generation, were also studied by denaturing gradient gel electrophoresis （DGGE）. Clostriclium sticklandii, Pseudomonas mendocina and Paenibacillus taejonensis were the three most enriched strains on the anode.

关 键 词：微生物燃料电池 阳极电势 产电微生物 群落结构 

分 类 号：X382[环境科学与工程—环境工程]