Increasing power density and dye decolorization of an X-3B-fed microbial fuel cell via TiO2 photocatalysis pretreatment

摘要: To improve the output power density of dye-fed microbial fuel cells (MFCs), which decreases with increasing dye concentration, a new strategy involving TiO2 photocatalysis pretreatment high content wastewater was proposed and demonstrated in this study. 200 mg L−1 X-3B treated using F-doped nano-TiO2 under visible light for 2.5 h then mixed into substrate, maximum (PM) MFC reached 392 mW m−2. As comparison, PM only 276 m−2 when untreated used as substrate. About 42% retrieved from fed concentration via prior photocatalytic treatment. Moreover, decolorization rate also enhanced to 56.5% combined process. The increase after attributed less electron consumption by decomposed X-3B, extra donors mediators produced intermediates well increased bacterial diversity anode chamber. These results an effective easy implement technology improving both electricity harvest pollutant elimination wastewaters that contain concentrated hard-to-use biomass without specially acclimatizing or modifying MFC.