Biofilm and nanowire production leads to increased current in Geobacter sulfurreducens fuel cells

被引:631
作者
Reguera, Gernma [1 ]
Nevin, Kelly P. [1 ]
Nicoll, Julie S. [1 ]
Covalla, Sean F. [1 ]
Woodard, Trevor L. [1 ]
Lovley, Derek R. [1 ]
机构
[1] Univ Massachusetts, Dept Microbiol, Amherst, MA 01003 USA
关键词
HARVESTING ELECTRICITY; OXIDATION; REDUCTION; ENERGY;
D O I
10.1128/AEM.01444-06
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Geobacter sulfurreducens developed highly structured, multilayer biofilms on the anode surface of a microbial fuel cell converting acetate to electricity. Cells at a distance from the anode remained viable, and there was no decrease in the efficiency of current production as the thickness of the biofilm increased. Genetic studies demonstrated that efficient electron transfer through the biofilm required the presence of electrically conductive pili. These pili may represent an electronic network permeating the biofilm that can promote long-range electrical transfer in an energy-efficient manner, increasing electricity production more than 10-fold.
引用
收藏
页码:7345 / 7348
页数:4
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