Investigation on decolorization of biologically pretreated cellulosic ethanol wastewater by electrochemical method
作者： Lili Shan , Junfeng Liu , John J. Ambuchi , Yanling Yu , Linlin Huang
DOI: 10.1016/J.CEJ.2017.04.121
关键词: Chloride 、 Chlorine 、 Inorganic chemistry 、 Chemical oxygen demand 、 Electrochemistry 、 Cellulosic ethanol 、 Supporting electrolyte 、 Chemistry 、 Chloroform 、 Wastewater
摘要: Abstract The biologically pretreated cellulosic ethanol wastewater poses a serious environmental concern because of its refractory and color compounds. decolorization electrochemical oxidation using Sb doped Ti/SnO 2 electrode for advanced treatment under different current density (5–30 mA·cm −2 ), initial pH (3–8.9) supporting electrolyte (0–0.25 M NaCl) was investigated in this study. Complete decolorization, 8.5% chemical oxygen demand (COD) 69.1% dissolved organic carbon removal efficiencies were achieved the optimal conditions (20 mA·cm , 5 0.1 M after 150 min. energy consumption required to meet National Discharge Standard (GB 27631-2011) is 93.8 kWh kg COD −1 . Further investigation revealed that hydroxyl radicals played primary role degradation contaminants, while active chlorine formed from chloride less important role. Direct anodic indirect reaction via peroxodisulfate generated sulfate could be negligible. formation chlorination by-products appeared low since final total Trihalomethanes concentration detected 263 µg L with detection chloroform as main Trihalomethanes.
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