원문정보
초록
영어
Recently it was found out that biofilm on the anode surface and nanowire production lead to increased power output in Geobacter sulfurreducens fuel cells, which imply that biofilm formation on the electrode surface may provide biological clue to the increase of power generation in microbial fuel cell (MFC). That is to say, we can efficiently enhance the performance of MFC based on the biofilm control strategy. We focused on quorum sensing, the regulation mechanism of bacteria' s group behavior in cell density dependent fashion, which is known as a key factor affecting biofilm formation. First, the acyl-homoserine lactone type quorum sensing activity of the mixed culture inoculated to the MFC was proved by Agrobacterium tumefaciens A136 (Ti-)(pCF218)(pCF372) bioassay. Then, during the operation of two-chamber type MFC, the anode was taken out and analyzed at each step of power generation development to verify the correlation among power generation, biofilm formation, and quorum sensing activity. After confirming the possibility of biofilm control by quorum sensing technique, we injected the acyl-homoserine lactone to the anode chamber to help biofilm growth on the electrode and examined the effect on power generation of MFC.