Decolourization of Real Polluted Textile Wastewater By Electrochemical Oxidation Method

Abstract

Textile industry uses large quantities of water for their process like scouring, desizing, dyeing, etc. They generate wastewater in proportionate order. The dyes used in textile processes are a major source of environmental pollution. Hence, there is a need to eliminate the dyes in the wastewater before its discharge into the water bodies. Electrochemical oxidation method was adopted to decolourize textile dye sample collected from textile industry. In this study using Graphite as an anode and cathode, a number of batch experiments was run in a laboratory-scale to decolourize the wastewater. The results are reported in terms of percentage removal of Chemical Oxygen Demand (COD), Colour by varying NaCl concentrations and different current densities of 56, 96, 136, 176 and 216 A/m2. It was observed that increasing the NaCl concentrations and increased current density brings down the colour and COD.COD and percentage colour removal were 70% and 89% respectively. Electrochemical oxidation method is an advanced technology which is able to treat textile wastewater having high COD and colour efficiently before it is treated further or discharged into the water bodies.