文献类型：期刊文献

英文题名：Enhanced ultrafiltration membrane fouling alleviation by module rotation with Fe-based flocs

作者：Miao, Rui[1];Qiu, Kaipei[2];Wang, Bodong[1,3];Wei, Xiping[1,3];Zuo, Jiaqi[2];Ma, Baiwen[3,4]

机构：[1]Xian Univ Architecture & Technol, Res Inst Membrane Separat Technol Shaanxi Prov, Key Lab Membrane Separat Shaanxi Prov,Sch Environ, Key Lab Northwest Water Resources,Key Lab Environ, Yan Ta Rd 13, Xian 710055, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China;[4]Univ Duisburg Essen, Lehrstuhl Tech Chem 2, D-45117 Essen, Germany

年份：2021

卷号：9

期号：5

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20232114134537);WOS:【SCI-EXPANDED(收录号:WOS:000703377700002)】；

基金：This work was supported by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (51820105011), National Natural Science Foundation of China (52070150, 52070183), Shanghai Sailing Program (19YF1410400), and Program of the Youth Innovation Promotion Association of the Chinese Academy of Sciences.

语种：英文

外文关键词：Ultrafiltration; Flocs; Integrated progress; Rotation of module; Fouling reduction

摘要：The modules of ultrafiltration (UF) membrane always occupy a fixed position during filtration. This results in a gradual aggravation of membrane fouling because of the continuous pollutants deposition. However, it is known that the cake layer is composed of loosely hydrolyzed flocs. Therefore, in this study, the rotation concept of membrane-module was investigated in conjunction with the integrated floc (Fe-based)-UF process. We found that the Fe-based flocs can be easily peeled off the membrane surface during rotation, and the UF membrane fouling was alleviated, particularly with spiral module rotation because of the strong shearing force induced. The fouling behavior after spiral module rotation was similar for different floc dosages because of the looseness cake layer formed. The applied computational fluid dynamics model showed that a greater spiral rotation height corresponded to a larger water velocity distribution and stronger shearing force in the membrane tank, and this resulted in a reduction in the fouling degree due to the thinner cake layer formed. Moreover, in comparison with alkaline conditions, a slightly more severe fouling degree was observed under acidic conditions because of the induced denser cake layer with smaller Fe-based floc sizes; however, a significantly higher humic-acid removal efficiency was observed. In addition, UF membrane performed well with river water samples taken from the South-to-North water diversion project in China (Beijing), thereby indicating the rotating module potential application in membrane-based drinking water treatment.