Metabolite analysis of Clostridium acetobutylicum: Fermentation in a microbial fuel cell |
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Authors: | Amethist S FinchTimothy D Mackie Christian J SundJames J Sumner |
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Institution: | U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD 20783, United States |
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Abstract: | Microbial fuel cells (MFCs) were used to monitor metabolism changes in Clostridium acetobutylicum fermentations. When MFCs were inoculated with C. acetobutylicum, they generated a unique voltage output pattern where two distinct voltage peaks occurred over a weeklong period. This result was markedly different to previously studied organisms which usually generate one sustained voltage peak. Analysis of the fermentation products indicated that the dual voltage peaks correlated with glucose metabolism. The first voltage peak correlated with acidogenic metabolism (acetate and butyrate production) and the second peak with solventogenic metabolism (acetone and butanol production). This demonstrates that MFCs can be applied as a novel tool to monitor the shift from acid production to solvent production in C. acetobutylicum. |
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Keywords: | Microbial fuel cells MFC Fermentation products Clostridium acetobutylicum Current generation |
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