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首页> 外文期刊>Water Research >Microscopic observation of particle reduction in slaughterhouse wastewater by coagulation-flocculation using ferric sulphate as coagulant and different coagulant aids
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Microscopic observation of particle reduction in slaughterhouse wastewater by coagulation-flocculation using ferric sulphate as coagulant and different coagulant aids

机译：用硫酸铁作絮凝剂和不同混凝剂进行混凝-絮凝的显微观察

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A coagulation-flocculation treatment has been applied to a slaughterhouse liquid effluent, using ferric sulphate as coagulant and activated silica, powdered activated carbon, cationic polyacrylamide, polyvinyl alcohol, polyacrylic acid and anionic polyacrylamide as coagulant aids in order to improve the settling time. Once the optimal conditions had been established (speed and time of stirring during flocculation step, pH, coagulant and coagulant aid doses), the efficiency of the coagulation-flocculation process was studied by comparing the particle size distribution before and after the addition of the coagulant. When ferric sulphate was used without the coagulant aids, particle removal efficiency varied with size, although overall efficiency was quite substantial (87%). The use of coagulant aids improved the removal efficiency, except in the case of activated silica, when it fell to 78%. In all other cases removal efficiency values between 93% (for polyvinyl alcohol) and 99% (for anionic polyacrylamide) were reached.
机译：为了缩短沉淀时间，已经使用硫酸铁作为凝结剂和活性二氧化硅，粉状活性炭，阳离子聚丙烯酰胺，聚乙烯醇，聚丙烯酸和阴离子聚丙烯酰胺作为凝结助剂，对屠宰场废水进行了凝结-絮凝处理。一旦确定了最佳条件（絮凝步骤中搅拌的速度和时间，pH，凝结剂和助凝剂的剂量），便通过比较加入凝结剂前后的粒径分布来研究凝结絮凝过程的效率。 。当使用硫酸铁而不使用助凝剂时，颗粒去除效率随尺寸而变化，尽管总体效率相当高（87％）。凝结助剂的使用提高了去除效率，但在活化二氧化硅的情况下，去除率降至78％。在所有其他情况下，去除效率值均在93％（对于聚乙烯醇）和99％（对于阴离子聚丙烯酰胺）之间。

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