Jesu A, Prabudoss Kumar L

ABSTRACT

The Investigator has made and attempts to study the impact of dyeing effluent containing both the inorganic and organic pollutants even after the treatment using RO plant. The effluent include oils, greases, metallic wastes, suspended solids, phenols, toxins, acids, salts, dyes, cyanides, DDT. Many of which are not readily susceptible to degradation and causes serious water pollution problems. In general it increases the TDS, hardness of water, and heavy metal resent in the effluents from dyeing units are percolated in and around the Tirupur District. Maximum amounts of dyes are used in the textile processing, due to the incomplete absorption of dyes and washing operations. The effluent volume is high and the dyestuffs are highly structured polymers and are very difficult to decompose biologically. The most obvious impact of the discharge of dyeing effluent is the persisting nature of the color. It is stable and fast, difficult to degrade, toxic, rendering the water unfit for its intended use. Dyestuffs can reach the aquatic environment, primarily dissolved or suspended in water, since the conventional treatment of wastewaters from textile mills and dyestuff factories are unable to remove most of the azo and other dyes effectively. The resulting dye effluents may contain some components and dyeing that coluld is toxic, carcinogenic and mutagenic to aquatic life. Ecological and toxicological problems due to the discharge of dyeing wastewaters, in natural water bodies, have been one of the most important water pollution problems in various dyeing units in and around Tirupur District. Keywords- dyeing effluent, solar evaporation, zero liquid discharge,black kadappa tank.