Power generation by microbial fuel cells using oral bacteria

DOI IR Open Access

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  • 口腔内細菌を用いた微生物燃料電池（MFC）発電実験

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To investigate the relationship of oral hygiene with electric potential, a microbial fuel cell (MFC) was created using Streptococcus mutans, a representative caries-causing bacteria. S. mutans showed the ability to generate electricity under experimental conditions. This S. mutans-generated electricity was accompanied by biofilm accumulation on the anode carbon felt electrode surface. The amount of accumulated biofilm in the anode chamber correlated with S. mutans electric power generation in the MFC system. These results suggest that oral microorganisms may act as fuel cells in the oral cavity and that their power may be related to the process of biofilm formation. Measurement of oral potential may be effective as a simple method for monitoring oral hygiene.

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