Decreasing COD Levels and Colors of Textile Industrial Waste with Electro-fenton Method

Abstract

The wastewater from the coloring process in the textile industry threads and fabrics generally contains Azo compounds and organic pollutants which are difficult to decompose biologically and require a long time. The handling of these organic pollutants can be carried out with alternative advanced oxidation processes (AOPs) technology including the Electro-Fenton method. This study aims to obtain optimum operating conditions reduction of chemical oxygen demand (COD) and color in textile industry wastewater using the Electro-Fenton method. Processing is done by using the Electro-Fenton Method in batches with a time variation of 30.60,90,120,180 minutes. Using variations of electrical voltage of 6 volts with electrode distance is 2cm, 7 volts with electrode distance is 4cm, 8 volts with electrode distance is 6cm, variations of fenton doses based on the ratio of the molar ratio of H 2 O 2 :FeSO 4 of (10:0.1), (10:0.2), (10:0,3). In addition to batching, this study also carried out a continuous Electro-Fenton experiment using electric voltage and electrode distance and the best contact time of the batch process. Based on the research, the processing efficiency of COD and Color in the textile industry wastes produced using the Electro-Fenton method of 94.1%, and 99.2%, respectively, on the ratio of the molar ratio of H 2 O 2 :FeSO 4 10:0.1 with a voltage of 7 volt and 4 cm electrode distance in 180 minutes contact time and pH condition 4.