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首页> 外文期刊>International Journal of Environmental Science and Technology >Hybrid coagulation/ozonation treatment of pharmaceutical wastewater using ferric chloride, polyaluminum chloride and ozone
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Hybrid coagulation/ozonation treatment of pharmaceutical wastewater using ferric chloride, polyaluminum chloride and ozone

机译：氯化铁，聚氯化铝和臭氧的混合混凝/臭氧化处理制药废水

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摘要

In recent years, concerns about the occurrence and fate of active pharmaceutical ingredients, solvents, intermediates and raw materials that could be present in pharmaceutical industry effluents have gained increasing attention. Conventional treatment methods, such as activated sludge, are not sufficient enough to remove active pharmaceutical ingredients completely. As a result, complementary treatment methods like coagulation and flocculation are often used and play a critical role in industrial and municipal wastewater treatment. The primary goal of these methods is to destabilize and remove colloidal particles along with other organic/inorganic contaminants. Recently empirical works have considered ozone as the most promising oxidant for the removal of micro-pollutants. The current study examined the effectiveness of coagulation/flocculation process using ferric chloride, polyaluminum chloride, and aluminum sulfate as a reasonable approach to tackle the issue of treating pharmaceutical wastewater. In addition, the results were compared with the process using only ferric chloride that was the coagulant of an actual treatment plant. Then, improvement of the process performance was investigated using ozone as an oxidant. In conclusion, it was found out that polyaluminum chloride presented better performance among two other coagulants and also adding 200 mg/L of polyaluminum chloride can lead to 97-98 % turbidity removal efficiency. Moreover, polyaluminum chloride was capable of reducing most of the environmental parameters such as chemical oxygen demand and total dissolved solid with the removal efficiency of 70 and 68 %, respectively. Additionally, ozonation improved the coagulation process, especially iron ion removal, and dramatically decreased the concentration from 5.68 to 0.19 mg/L.
机译：近年来，人们对制药业废水中可能存在的活性药物成分，溶剂，中间体和原料的发生和命运的关注日益引起关注。传统的处理方法，例如活性污泥，不足以完全去除活性药物成分。结果，经常使用诸如凝结和絮凝之类的辅助处理方法，它们在工业和市政废水处理中起着至关重要的作用。这些方法的主要目的是使胶体颗粒与其他有机/无机污染物一起稳定并去除。最近的经验研究认为，臭氧是去除微污染物最有希望的氧化剂。当前的研究检验了使用氯化铁，聚氯化铝和硫酸铝作为解决制药废水处理问题的合理方法的混凝/絮凝过程的有效性。此外，将结果与仅使用氯化铁（实际处理厂的凝结剂）的过程进行了比较。然后，研究了使用臭氧作为氧化剂的工艺性能的改善。总之，发现聚氯化铝在其他两种混凝剂中表现出更好的性能，并且添加200 mg / L的聚氯化铝可以达到97-98％的除浊效率。而且，聚氯化铝能够降低大多数环境参数，例如化学需氧量和总溶解固体，去除效率分别为70％和68％。此外，臭氧化改善了混凝过程，特别是铁离子的去除，并将浓度从5.68 mg / L大大降低了。

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