Pollution Research Paper

Vol.30, Issue 4, 2011; Page No.(477-482)

APPLICATION OF BIOTECHNOLOGY IN THE TREATMENT OF TEXTILE PROCESSING INDUSTRY EFFLUENT USING MEMBRANE TECHNIQUES

K.Ravichandran, K.S.Priyenka Devi, Dr.K.Saravanan

Abstract

The aim of this study is to treat textile processing effluents from fourteen small scale industries collected in an equalization tank of Common Effluent Treatment Plant (CETP). In the primary treatment lime, FeCl2 and poly electrolyte are added to make the effluent bio degradable. The biological treatment system was investigated as a pre treatment to membrane technique. When treating the mixed waste water of dyeing house, a combination of biological and membrane treatment has proved to meet all requirements of standards for its reuse. But this approach is associated with lot of technological effort and high cost. As alternative, only wash water effluent treatment was studied. Based on the results, a novel integrated recycling process is proposed. The treatment is carried out in three stages namely Physico-chemical, biological and membrane techniques. Various methods for Physico-chemical process were carried out to examine its efficiency. The work concerns the membrane treatment after conventional biological treatment to make wash water fit for reuse in processing. By implementing this composite sequential process water consumption can be cut down by 82.5% for washing process and the removal efficiency of Total Dissolved Solids (TDS), Chemical Oxygen Demand (COD), Biological Oxygen Demand(BOD) are in the range of 80-97%, 97-100% and 99-100% respectively. Finally about less than 5% of the reject from multiple effect evaporators (MEE) of the effluent volume is allowed to solar evaporation pond.

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