Decolorization of azo dye in a newly developed plug- flow baffled bioelectrocatalyzed reactor

In this study, we designed a membrane-free, continuous plug-flow baffled bioelectrocatalyzed reactor (PFB-BER) to enhance the degradation of azo dye containing wastewater. The efficiency of decolorizition of alizarin yellow R (AYR) was tested in such a bioelctrochemical system with acetate as carbon source. The influent containing AYR (100mg·L) and acetate (1000mg·L, 25mM PBS) was flowed into the PFB-BER continuously under an external power source of 0.5V. The decolorizaiton of AYR increased from ~70% to 90% at HRT of 24h. The decolorization of AYR reduced from 80% at 12h to 70% at 8h and to 45% at 4h. While, the decolorization enhanced to 80% at 4h and to 96% at 8h with additional cathode electrode volume rate up to 20% being introduced to the system.