Microbial synergistic interactions enhanced power generation in co-culture driven microbial fuel cell.

摘要: Abstract An understanding of the inter-species relationships, especially their metabolic network in a mixed-culture system, is crucial to design an effective inoculum for enhancing power generation wastewater fed microbial fuel cell (MFC). In present study, influence mutualistic interactions on palm oil mill effluent MFCs has been widely investigated by designing several co-culture and mixed culture inoculums. Among different compositions, highest density 14.8 W/m3 was achieved Pseudomonas aeruginosa Klebsiella variicola due synergistic relationships which were inter-linked via fermentation-based metabolites. Besides, interaction K. Bacillus cereus positively influenced resulting maximum 11.8 W/m3 whereas antagonistic relationship between B. P. resulted lower 1.9 W/m3. The with polarization, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), as well using metabolite biofilm analysis. It observed that synergism bacteria enhanced through production higher electron shuttling mediators efficient formation evidenced CV EIS contrast, inhibiting metabolites leading ineffective biofilm. These findings demonstrate or within microorganisms emergent achieving MFCs.