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Treatment systems consisting of physico-chemical treatment, biological treatment, ozonation, reverse osmosis system, nanofiltration system, multiple effect evaporator, crystalliser and solar evaporation pans set up by three dyeing units in Tirupur, India, were assessed in the present study. The composite samples were analysed for colour, pH, TSS, TDS, chlorides, sulphates, COD, total iron, silica,...
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