Xia Shengji, Zhang Xinran, Zhao Yuanchen, Tan Fibor J, Li Pan, Liu Yanling
Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China.
Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
Membranes (Basel). 2021 May 19;11(5):369. doi: 10.3390/membranes11050369.
The membrane separation process is being widely used in water treatment. It is very important to control membrane fouling in the process of water treatment. This study was conducted to evaluate the efficiency of a pre-oxidation-coagulation flat ceramic membrane filtration process using different oxidant types and dosages in water treatment and membrane fouling control. The results showed that under suitable concentration conditions, the effect on membrane fouling control of a NaClO pre-oxidation combined with a coagulation/ceramic membrane system was better than that of an O system. The oxidation process changed the structure of pollutants, reduced the pollution load and enhanced the coagulation process in a pre-oxidation-coagulation system as well. The influence of the oxidant on the filtration system was related to its oxidizability and other characteristics. NaClO and O performed more efficiently than KMnO. NaClO was more conducive to the removal of DOC, and O was more conducive to the removal of UV.
膜分离过程在水处理中得到了广泛应用。在水处理过程中控制膜污染非常重要。本研究旨在评估在水处理和膜污染控制中使用不同类型和剂量的氧化剂的预氧化 - 混凝平板陶瓷膜过滤工艺的效率。结果表明，在合适的浓度条件下，NaClO预氧化结合混凝/陶瓷膜系统对膜污染控制的效果优于O系统。氧化过程改变了污染物的结构，降低了污染负荷，并增强了预氧化 -混凝系统中的混凝过程。氧化剂对过滤系统的影响与其氧化性和其他特性有关。NaClO和O的效果比KMnO更有效。NaClO更有利于去除溶解性有机碳（DOC），而O更有利于去除紫外线（UV）。
