Optimization of Biological Oxygen Demand Reduction from Textile Effluent by Oxidation

Abstract

The textile dyeing and printing units in Sanganer town, Jaipur, Rajasthan, India. Discharge a huge volume of mostly untreated textile dye wastewater (10,000-15,000kl/day) into various pools and drain adjoining the textile printing units. A number of azo dyes are used in textile printing industries, As a result. The textile waste waters are loaded with them, along with other chemicals used during printing and fixing of dyes on cloth. The main cause of generation of this effluent is the use of huge volume of water either in the actual chemical processing or during re-processing in preparatory, dying, printing and finishing, which is responsible for higher biological oxygen demand(BOD), so currently these industries facing significant challenges, associated mainly with Environmental legislation because BOD removal reduction of could not be achieved, discharge effluent's concentration is too high from discharge limit prescribed by Rajasthan State Pollution Control Board, The objective of study is physiochemical analysis of water in study area and the BOD reduction in textile wastewater. For BOD reduction three oxidizers Hydrogen peroxide, Calcium hypochlorite, Potassium dichromate was used to compare their treatment efficiency at different temperature, dosages and retention time. Keywords: Textile industry, Textile effluent, BOD reduction, Oxidizing reagents, Discharge limit.