Abstract
Treatment of textile wastewaters from a large dyeing and finishing mill by a continuous process of combined chemical coagulation, Fenton's reagent and activated sludge process is investigated. The experimental results are assessed in terms of COD and colour (turbidity) reductions to determine the overall treatment efficiency of the continuous process. Operating variables, such as pH, polyalumminum chloride (PAC) and polymer addition and treatment time are explored to determine their respective effects on the treatment efficiency. Optimum range for the above operating variables is experimentally obtained. Economic evaluation of the continuous Fenton's treatment method indicates that it is a method which is highly competitive with conventional treatments practised in the textile industry.
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