Electerocoagulation of Blue and Mixed Azo Dyes and Application in Treating Simulated Textile Effluent

Document Type: Research Paper

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Abstract

This study investigated the efficiency of electerocoagulation (EC) in removing color from synthetic and simulated textile wastewater. The study on decolorization of mixed dyes is a step toward an effective treatment of textile wastewater. Two representative reactive dye molecules were selected for the synthetic dye wastewater, a blue dye alone and mixed dye (black, blue, red, 1:1:1v/v). The EC technique showed satisfactory color (98 %) and chemical oxygen demand (85%) removal efficiency and reliable performance in treating both individual and mixed dye types. The removal efficiency and energy consumption data showed that, for a given pH and optimum current density:100A/m2, Fe or Al were used in treating the dyes with an initial concentration of 100-1200 mg/L, the energy cost in achieving above 98% color removal was on order of 0.73-1.27kWh/m3 wastewater in all systems, water recovery was 0.97. It was found that the operating parameters used for the synthetic dye wastewater were less effective for treatment of simulated textile wastewater.

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