Colour Removal Technology Using Ozone in Textile Industrial Wastewater Effluent: an Overview

The elimination of pollutants from waste water is a serious challenge that needs to be addressed. The conventional treatment process has limitation of not completely removing colour from wastewater. Oxidation with ozone proves to be one of the most efficient methods of treatment of colored aqueous effluent from textile industries. The study highlights the importance of ozone in colour removal technology. Ozone is one of the most powerful and commercially available oxidants and is commonly used for municipal water and wastewater treatment. In addition to its oxidizing capabilities, it is an environmentally friendly method of treatment. Pollutants, colored substances, odors and microorganisms are directly destroyed by oxidation, without creating harmful chlorinated by-products or significant residues. The overview revealed that ozone reacts quickly with a large number of compounds and these compounds are attacked either directly by the ozone molecule or indirectly by the intermediately occurring hydroxyl radicals.