Treatment of textile wastewater by Fenton’s process as a Advanced Oxidation Process

Abstract

Textile manufacturing is a major industry. These are then fabricated into cloth. There are many variable processes are available at spinning and fabric forming stages coupled with complexities of finishing and coloration processes to production of wide ranges of products. All the processes generate considerable volume of effluents and hence, forms major source of wastewater containing organic and inorganic substances. Thus, Fenton reagent is an oxidative decomposition and transformation of organic substrates by H 2 O 2 / Fe 2+. Fenton reagent is a result of reaction between hydrogen peroxide (H 2 O 2) and ferrous ion (Fe 2+) producing hydroxyl radical, and is a strong oxidant capable of oxidizing various organic compounds. This process evaluates oxidation and coagulation, for removal of color and Chemical Oxygen Demand (COD) from textile wastewater containing dyes. For effective removal efficiency pH value should be in the range of 2.5 to 4. Fenton's reagent has been effective in treating various industrial wastewater and wide variety of dyes. Fenton process gives colour removal efficiency is 98% at pH 3 at FeSO 4 of 0.2 gm/lit. and H 2 O 2 of 0.1ml/lit. and COD removal efficiency is 85% at pH 3 at FeSO 4 of 1.2 gm/lit. and dose of H 2 O 2 of 0.6 ml/lit.