Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Chemosphere. 2019 Sep;231:349-356. doi: 10.1016/j.chemosphere.2019.05.154. Epub 2019 May 21.
Ultrafiltration (UF) technology is considered an efficient water treatment method. In recent years, researchers have been committed to enhancing the treatment efficiency of UF and alleviating membrane fouling. An effective method is to achieve this is through the use of coagulation as a pre-treatment to UF; however, during a long term operation, membrane fouling can occur due to the residual organic matters and the generation of microorganisms. In this study, we combine coagulation and ozonation as a pre-treatment of UF and compare four types of pre-treatment: coagulation, ozonation, coagulation followed by ozonation (C-O) and ozonation followed by coagulation (O-C). Results showed that ozonation alone did not perform well. Both combinations of coagulation and ozonation enhanced the organic matter removal efficiency, although membrane fouling was lowest following the C-O pre-treatment as the microbial load was reduced. While a slight increase in the yield of disinfection by-products was observed with the addition of ozonation, the concentration remained below the Chinese standard for tap water quality (100 μg/L).
超滤 (UF) 技术被认为是一种高效的水处理方法。近年来，研究人员一直致力于提高 UF 的处理效率并减轻膜污染。一种有效的方法是通过使用混凝作为 UF 的预处理来实现这一目标；然而，在长期运行过程中，由于残留有机物和微生物的产生，膜污染可能会发生。在本研究中，我们将混凝和臭氧氧化结合作为 UF 的预处理，并比较了四种预处理类型：混凝、臭氧氧化、混凝后臭氧氧化 (C-O) 和臭氧氧化后混凝 (O-C)。结果表明，单独的臭氧氧化效果不佳。尽管 C-O 预处理后的微生物负荷降低，膜污染最低，但混凝和臭氧氧化的组合均提高了有机物去除效率。虽然随着臭氧氧化的加入，消毒副产物的产量略有增加，但浓度仍低于中国自来水水质标准（100μg/L）。
