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首页> 外文期刊>Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B >A review on application of flocculants in wastewater treatment
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A review on application of flocculants in wastewater treatment

机译：絮凝剂在废水处理中的应用研究进展。

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摘要

Flocculation is an essential phenomenon in industrial wastewater treatment. Inorganic coagulants (salts of multivalent metals) are being commonly used due to its low cost and ease of use. However, their application is constrained with low flocculating efficiency and the presence of residue metal concentration in the treated water. Organic polymeric flocculants are widely used nowadays due to its remarkable ability to flocculate efficiently with low dosage. However, its application is associated with lack of biodegradability and dispersion of monomers residue in water that may represent a health hazard. Therefore, biopolymers based flocculants have been attracting wide interest of researchers because they have the advantages of biodegradability and environmental friendly. But, natural flocculants are needed in large dosage due to its moderate flocculating efficiency and shorter shelf life. Thus, in order to combine the best properties of both, synthetic polymers are grafted onto the backbone of natural polymers to obtain tailor-made grafted flocculants. This paper gives an overview of the development of different types of flocculants that were being investigated for treatment of industrial wastewater. Furthermore, their flocculation performance will be reviewed and the flocculation mechanism will be discussed.
机译：絮凝是工业废水处理中必不可少的现象。无机凝结剂（多价金属盐）由于其低成本和易用性而被普遍使用。但是，它们的应用受到絮凝效率低和处理水中残留金属浓度的限制。由于有机高分子絮凝剂以低剂量有效絮凝的显着能力，如今已广泛使用。然而，其应用与缺乏生物降解性和单体残留物在水中的分散有关，这可能危害健康。因此，基于生物聚合物的絮凝剂由于具有生物降解性和环境友好性的优点而引起了研究者的广泛兴趣。但是，由于天然絮凝剂的中等絮凝效率和较短的保存期限，因此需要大剂量。因此，为了结合两者的最佳性能，将合成聚合物接枝到天然聚合物的骨架上以获得定制的接枝絮凝剂。本文概述了正在研究处理工业废水的不同类型絮凝剂的发展。此外，将对它们的絮凝性能进行综述，并讨论其絮凝机理。

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