TY - JOUR N2 - Azo dye wastewater treatment is urgent necessary nowadays. Electrochemical technologies commonly enable more efficient degradation of recalcitrant organic contaminants than biological methods, but those rely greatly on the energy consumption. A novel process of biofilm coupled with electrolysis, i.e., bioelectrochemical system (BES), for methyl orange (MO) dye wastewater treatment was proposed and optimization of main influence factors was performed in this study. The results showed that BES had a positive effect on enhancement of color removal of MO wastewater and 81.9% of color removal efficiency was achieved at the optimum process parameters: applied voltage of 2.0 V, initial MO concentration of 20 mg/L, glucose loads of 0.5 g/L and pH of 8.0 when the hydraulic retention time (HRT) was maintained at 3 d, displaying an excellent color removal performance. Importantly, a wide range of effective pH, ranging from 6 to 9, was found, thus greatly favoring the practical application of BES described here. The absence of a peak at 463 nm showed that the azo bond of MO was almost completely cleaved after degradation in BES. From these results, the proposed method of biodegradation combined with electrochemical technique can be an effective technology for dye wastewater treatment and may hopefully be also applied for treatment of other recalcitrant compounds in water and wastewater. L1 - http://www.czasopisma.pan.pl/Content/112226/PDF/Archives%20vol%2045%20no%203__5.pdf L2 - http://www.czasopisma.pan.pl/Content/112226 PY - 2019 IS - No 3 EP - 43 DO - 10.24425/aep.2019.128639 KW - azo dye wastewater treatment KW - color removal KW - biofilm KW - electrolysis KW - bioelectrochemical system A1 - Zou, Haiming A1 - Chu, Lin A1 - Wang, Yan PB - Polish Academy of Sciences VL - vol. 45 DA - 30.08.2019 T1 - Azo dye wastewater treatment in a novel process of biofilm coupled with electrolysis SP - 38 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/112226 T2 - Archives of Environmental Protection ER -