DECOLORIZATION OF CONTINUOUS DYEING WASTE-WATER BY OZONATION

Since discharge limits are becoming stricter for industrial wastes, te xtile manufacturers are searching for efficient and economical methods of pollution reduction. This is typical of the situation facing the t extile industry, especially in the area of color pollution emitted int o the earth's waterways. Ozone treatment to remove color from wastewat er could be a solution to the problem of color pollution. Color remova l is achieved to a remarkable degree using ozone. All of the classes o f dyes used in the textile industry are removed from wastewater to a c ertain extent, some poorly and others almost completely. Ozone also ca n aid in removing some other pollutants like surfactants and carriers that are commonly found in textile wet processing wastewaters. The pro cessing of waste at its source is a new approach to waste treatment. C olor removal is a prime example of the advantages of this method. Colo r removal immediately following the dyeing process increases the effic iency and the economics of ozonation and could become the ideal treatm ent method of the twenty-first century.