The wastewater generated from many industries contains suspended and dissolved solids, including organic and inorganic particles, metals, and other impurities. Direct flocculation is regularly used to neutralize the charge of the colloidal particles and bridge the destabilized particles together to form flocs in a cost- and time-effective way. This work refers to the development of new anionic flocculants (co- and terpolymers) tailored to be used in dairy-effluent treatment, using a synthesis process in which new oil phases free of aromatics are applied. Regarding the terpolymers, anionic polyacrylamides were synthesized in the presence of three different hydrophobic monomers at different concentrations. Flocculation performance was evaluated using an effluent from dairy industry. Results show that the developed polyelectrolytes are very promising additives for the treatment of the mentioned effluent. For optimized conditions, 95% turbidity reduction, 44% chemical-oxygen-demand removal, and 57% total-solids removal were achieved with only 53 mg/L of flocculant.

中文翻译：

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在无油工艺中合成的阴离子型聚电解质，用作絮凝剂在乳业-工业废水处理中的应用

许多行业产生的废水中都含有悬浮和溶解的固体，包括有机和无机颗粒，金属和其他杂质。通常使用直接絮凝作用来中和胶体颗粒的电荷，并将不稳定的颗粒桥接在一起，从而形成一种既经济又节省时间的絮凝物。这项工作是指使用合成工艺开发适用于乳制品废水处理的新型阴离子絮凝剂（共聚和三元共聚物），其中使用了不含芳族化合物的新油相。关于三元共聚物，在三种不同浓度的不同疏水单体存在下合成了阴离子聚丙烯酰胺。使用乳业的废水评估絮凝性能。结果表明，开发的聚电解质是用于处理所述废水的非常有前途的添加剂。在最佳条件下，仅使用53 mg / L的絮凝剂就可以降低95％的混浊度，44％的化学需氧量和57％的总固形物去除率。