Title :
Decolorization study of coking wastewater by continuous electrocoagulation process
Author :
Zhang Lei ; Xue Gaifeng ; Zhang Nan ; Liu Shangchao ; Duan Aimin ; Wang Lina
Author_Institution :
R&D Center, WISCO, Wuhan, China
Abstract :
In this study, decolorization and chemical oxygen demand (COD) reduction of coking wastewater by electrocoagulation process has been investigated. Effects of operating parameters, such as current density, pH of solution, electrolyte concentration and hydraulic residence time (HRT) on decolorization by continuous electrocoagulation were further studied in order to optimize process performance. The UV-Vis spectrum data supported the decolorization and degradation of organic pollutants of coking wastewater. These results showed great potential of electrocoagulation process as a decolorization treatment of coking wastewater, and up to 91% of color removal efficiency was obtained at 25°C after 80min reaction with a current density of 30mA·cm-2, a p H of 8.0, an electrode distance of 1.0cm, a supporting electrolyte concentration of 0.5g·L-1.
Keywords :
coagulation; coke; current density; industrial waste; organic compounds; reduction (chemical); ultraviolet spectra; visible spectra; wastewater treatment; UV-vis spectrum data; chemical oxygen demand reduction; coking wastewater; color removal efficiency; continuous electrocoagulation process; current density; decolorization treatment; electrolyte concentration; hydraulic residence time; organic pollutant degradation; Anodes; Board of Directors; Cathodes; Color; Effluents; Oxidation; Wastewater; coking wastewater; continuous electrocoagulation; decolorization; operating parameters;
Conference_Titel :
Materials for Renewable Energy & Environment (ICMREE), 2011 International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-749-8
DOI :
10.1109/ICMREE.2011.5930940
