Is resistance futile? Changing external resistance does not improve microbial fuel cell performance.
Microbial fuel cells (MFCs) show promise as an alternative to conventional batteries for point source electricity generation. A better understanding of the relationship between the microbiological and electrical aspects of fuels cells is needed prior to successful MFC application. Here, we observed the effects of external resistance on power production and the anodic biofilm community structure. Large differences in the external resistance affected both power production and microbial community structure. After the establishment of the anodic microbial community, change in external resistance (from low to high and vice versa) changed the anodic microbial community structure, but the resulting community did not resemble the communities established at that same external resistance. Different microbial community structures, established under different external resistances, resulted in similar power production, demonstrating the flexibility of the MFC system.
Lyon
Delina Y
DY
Environmental Microbial Genomics Group, Laboratoire Ampére, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Ecully Cedex, France. dlyon@ec-lyon.fr
Buret
Francois
F
Vogel
Timothy M
TM
Monier
Jean-Michel
JM
D018407:Bacterial Physiological Phenomena; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D018441:Biofilms / Q000254:growth & development*; D017097:Electric Impedance; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes / Q000382:microbiology*; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis