PHYSICO-CHEMICAL CHARACTERISTICS OF UNTREATED EFFLUENT FROM TANNERY INDUSTRIES IN TAMIL NADU: A COMPARATIVE STUDY

Abstract

The Physico-chemical characteristics of tannery effluents from four different stations, Ambur(latitude of 12.78^oN and the longitude of 78.7^oE); Vaniyambadi (78^o-35^o and 78^o–38^o North latitude and 12^o–42^o East longitude); Dindigul (latitude of 10.35⁰N and the longitude of 77.95⁰E ); Ranipet (latitude of 12.942⁰N and the longitude of 79.323⁰E ) were compared. In stations other than I and III the effluents were alkaline. In station I, the TDS, BOD and COD were comparatively higher. The effluent collected from station I differed significantly from the effluent collected from other stations with reference to the different physico-chemical characteristics based on Tukey Comparision.