Water purification by combined process of KMnO4-PAC-ceramic membrane filtration
YU Hong-jiian1, LI Xiao-sa1, LI Tian1,2,3,4, DONG Bing-zhi1,2,3, XIA Sheng-ji1,2,3
1. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; 2. State Key Laboratory of Pollution Control and Resource Reuse, Shanghai 200092, China; 3. Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai 200092, China; 4. Key Laboratory of Water Supply, Water Saving and Water Environment Treatment for Towns in the Yangtze River Delta, Ministry of Water Resources, Shanghai 200092, China
Abstract：Submerged flat sheet ceramic ultrafiltration membrane (CUF) was used to filtrate water samples with model foulants of humic acid (HA), bovine serum albumin (BSA) and sodium alginate (SA) under the constant flux of 120L/(m2·h), with the pretreatment methods of KMnO4 pre-oxidation, activated carbon (PAC) adsorption and the combined process. The effect on the removal of DOC and the integral standard volume of the model pollutants in the fluorescence area, and the membrane filtration enhancement on the fouling related indicators (specific transmembrane pressure difference, membrane fouling index, membrane filtration resistance, etc.) were investigated. The combined KMnO4-PAC-ceramic membrane filtration process had the best removal performance on the three model pollutants of HA, BSA and SA, with the DOC removal ratios of 50.9%, 61.0% and 94.2%, respectively. In terms of membrane fouling control, compared with individual KMnO4 pre-oxidation or PAC adsorption, the combined KMnO4-PAC pretreatment process exhibited higher membrane fouling control efficiency, with fouling rates of 13.0%, 28.0% and 4.5% for HA, BSA and SA, respectively. In addition, the combined KMnO4-PAC pretreatment process could effectively alleviate the reversible membrane fouling in the filtration of BSA and SA, with the decrease ratios of reversible filtration resistance of 20.5% and 21.4%, respectively, thus to better reduce membrane fouling.
于洪鉴, 李潇洒, 李甜, 董秉直, 夏圣骥. 高锰酸钾-活性炭-陶瓷膜组合工艺净水效能[J]. 中国环境科学, 2023, 43(8): 3909-3917.
YU Hong-jiian, LI Xiao-sa, LI Tian, DONG Bing-zhi, XIA Sheng-ji. Water purification by combined process of KMnO4-PAC-ceramic membrane filtration. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(8): 3909-3917.
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