洗车废水(CWWs)含有不同含量的各种污染物。因此,选择合适的治疗方法是一个巨大的挑战。毫无疑问,超滤(UF)过程是最有趣和可靠的选择之一。因此,本研究的主要目的是调查用于长期治疗真正的CWWW的UF膜的性能。为此,使用两种截留分子量(MWCO)值等于10和100kDa的聚醚砜(PES)膜。不出所料,在UF运行期间,观察到渗透通量的显著降低。然而,立即证明,用昆虫剂(pH=11.5)系统清洁膜(每天)防止了该过程性能的进一步下降。此外,这项研究的重点是在过程运行期间的相对通量,当UF安装充满蒸馏水时,中断持续几天。这项研究的结果表明,水性介质有利于微生物粘附到表面,从而导致在加工设备内部形成生物膜。因此,已经进行了许多尝试来恢复最初的膜性能。已经发现,需要使用几种化学试剂。更确切地说,使用昆虫溶液,P3Ultrasil11代理商,和磷酸将相对通量增加到0.8的值。最后,已经表明,在这项工作中使用的膜对长期暴露于细菌和化学试剂具有抗性。然而,在MWCO为10kDa的膜分离过程中,获得了较小的污垢影响和较高的清洁效果。最后,本研究展示了对将UF工艺应用于CWW治疗的新颖分析和创新意义。
Car wash wastewaters (CWWs) contain various pollutants with different contents. Hence, selecting an appropriate process for their treatment is a great challenge. Undoubtedly, the
ultrafiltration (UF) process is one of the most interesting and reliable choices. Therefore, the main aim of the current study was to investigate the performance of the UF membranes used for the long-term treatment of real CWWs. For this purpose, two polyethersulfone (PES) membranes with molecular weight cut-off (MWCO) values equal to 10 and 100 kDa were applied. As expected, a significant decrease in the permeate flux during the UF run was observed. However, it was immediately demonstrated that the systematic cleaning of membranes (every day) with Insect agent (pH = 11.5) prevented a further decline in the process\'s performance. In addition, this study focused on the relative flux during the process run with breaks lasting a few days when the UF installation was filled with distilled water. The results of this research indicated that aqueous media favor microorganism adherence to the surface which leads to the formation of biofilms inside processing installations. As a consequence, many attempts have been made to restore the initial membrane performance. It has been found that the application of several chemical agents is required. More precisely, the use of an Insect solution, P3 Ultrasil 11 agent, and phosphoric acid increases the relative flux to a value of 0.8. Finally, it has been indicated that the membranes used in this work are resistant to the long-term exposure to bacteria and chemical agents. However, during the separation of CWWs for the membrane with an MWCO of 10 kDa, a lesser fouling influence and higher effectiveness of cleaning were obtained. Finally, the present study demonstrates a novel analysis and innovative implications towards applying the UF process for the CWW treatment.