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首页> 外文期刊>Journal of Hazardous Materials >Improvement of paint effluents coagulation using natural and synthetic coagulant aids
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Improvement of paint effluents coagulation using natural and synthetic coagulant aids

机译：使用天然和合成助凝剂改善油漆废水的凝结

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摘要

The coagulant iron chloride and the flocculants Polysep 3000 (PO), Superfloc A-1820 (SU) and Praestol 2515 TR (PR) have been used in this study to show the efficiency of coagulation flocculation process in the chemical precipitation method for the removal of organic and colouring matters from the paint industry wastewater. This study also includes the amount of produced sludge. The results indicate that FeCl_3 is efficient at pH range 8-9 and at optimal dose of 650 mg l~(-1). Iron chloride allows the removal of 82% of chemical oxygen demand (COD) and 94% of colour. However, sequential addition of coagulant and polymeric additives enhance clearly pollutant removal and produces less decanted sludge compared to the results obtained when the coagulant is used alone. The removal efficiency of COD reaches 91 % and that of colour 99%. Coagulation-biflocculation process is more effective than the coagulation-monoflocculation one. The sequential addition of iron chloride, Polysep 3000 (cationic flocculant) and Praestol 2515 TR (anionic fiocculant) seems to be the most suitable combination for the treatment of the paint industry wastewaters.
机译：本研究已使用凝结剂氯化铁和絮凝剂Polysep 3000（PO），Superfloc A-1820（SU）和Praestol 2515 TR（PR）来表明凝结絮凝过程在化学沉淀法中去除水中的效果。涂料工业废水中的有机物和色素。该研究还包括产生的污泥量。结果表明，FeCl_3在pH范围8-9和最佳剂量650 mg l〜（-1）时有效。氯化铁可去除82％的化学需氧量（COD）和94％的颜色。但是，与单独使用凝结剂时相比，相继添加凝结剂和聚合物添加剂可以明显提高污染物的去除率，并减少倾析出的污泥。 COD的去除效率达到91％，颜色的去除效率达到99％。混凝-絮凝过程比混凝-絮凝过程更有效。依次添加氯化铁，Polysep 3000（阳离子絮凝剂）和Praestol 2515 TR（阴离子絮凝剂）似乎是最适合涂料工业废水处理的组合。

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