Effect of potassium permanganate dosing position on the performance of coagulation/ultrafiltration combined process

作     者：He Zhao Liang Wang Hongwei Zhang Xiaona Wu Bin Zhao Fei Han 

作者机构：School of Environmental Science and TechnologyTianjin UniversityTianjin 300072China State Key Laboratory of Separation Membranes and Membrane ProcessesTianjin Polytechnic UniversityTianjin 300387China School of Civil Engineering and TransportationHebei University of TechnologyTianjin 300401China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第1期

页      面：89-95页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 0815[工学-水利工程] 081701[工学-化学工程] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(51478314,51638011) the National Key Project for Research and Development Program of China(2016YFC0400503) the Natural Science Foundation of Tianjin(14JCQNJC09000) Science and Technology Research Projects of Colleges and Universities of Hebei Province(QN2015122) 

主　　题：高锰酸盐 coa 位置 KMnO4 凝结过程 表演 钾 自然有机物 

摘      要：The effects of potassium permanganate(KMnO_4)dosing position on the natural organic matter(NOM)removal as well as membrane fouling were investigated in the coagulation/ultrafiltration combined ***_4 oxidation altered the NOM characteristics in terms of hydrophobicity and molecular weight,and destroyed humic substances originated from terraneous organisms in raw *** optimal KMnO_4 dosage was 0.5 mg·L^(-1) in the peroxidation enhanced coagulation process with respect to the dissolved organic carbon(DOC)*** KMnO_4 was dosed into both upstream and downstream of coagulation,namely in the proposed twoposition dosing mode,coagulation and KMnO_4 oxidation worked individually on the apparent DOC ***,compared to the KMnO_4 addition prior to or after coagulation,the two-position dosing mode dramatically alleviated membrane fouling and reduced fouling *** was attributed to the change of NOM characteristics as a result of KMnO_4 addition prior to coagulation and the presence of MnO_2 on membrane surface as a result of KMnO_4 addition prior to *** work may provide useful information for the application of KMnO_4 oxidation in the coagulation/ultrafiltration combined system.