Performance Of Microbial Fuel Cell (MFC) Using In Dye Decolorization And Electricity Production

Shewanella WLP72 was subjected to long-term dye acclimated, and found that long acclimation discolored could improve its dye decolorizing.Decolorization experiments using acclimated microbes indicated that decolorized metabolites?e.g., decolorized intermediates? could promote reductive decolorization. Here, decolorized intermediates of model azo dyes 2AP, 4AP, 1A2 N, 4A1 N, B12 d, B14 d, 12 db, 14 db were used for comparison upon color removal performance of nanowire-generating Shewanella sp. WLP72. The findings indicated that-OH,-NH₂ substituents owned characteristics of electron shuttling, supporting that decolorized intermediates apparently could stimulate decolorization due to their electron-shutting capabilities.Moreover, using Shewanella sp. WLP72 serially acclimated in RBu160 and RBk5 as acclimated strains for decolorization, biodecolorized intermediates of RBu160, RG19 and malachite green were also capable to stimulate performance of reductive decolorization and bioelectricity generation. Nyquist plot of EIS profiles also suggested that significant reduction of internal resistance caused remarkable increase in power-density generation in MFCs. Results of simultaneous dye decolorization and power generation also confirmed the competition of both characteristics. This study provided a novel evaluation scheme to quantitatively reveal “synergistic” stimulation of microbial fuel cell?MFC?-assisted dye decolorization for industrial practicability. Apparently, using MFC as the method of dye decontamination could considerably increase ca. 40%⁷0% of electron transfer capabilities for SBG&DD, thereby significantly improving the performance of dye decontamination.Furthermore, carbon cloth electrode was modified by smoking method. Then hydrophilicity and conductive of carbon cloth electrode were increased, and then the electron flux was incerased. In a word, this study lay the foundation for the practical application of MFC in wastewater treatment and electricity production.