SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (2): 268-277.DOI: 10.1016/j.cjche.2017.04.008

• Separation Science and Engineering • 上一篇    下一篇

Insight into fouling behavior of poly(vinylidene fluoride) (PVDF) hollow fiber membranes caused by dextran with different pore size distributions

Kailiang Zeng1,2, Jie Zhou1,2, Zhaoliang Cui1,2, Yue Zhou1,2, Chuan Shi1,2, Xiaozu Wang1, Liyue Zhou3, Xiaobin Ding3, Zhaohui Wang1,2, Enrico Drioli4   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2 National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China;
    3 Nanjing Jiuying Membrane Technologies Co., Ltd., Nanjing 211899, China;
    4 Research Institute on Membrane Technology, ITM-CNR, Via Pietro Bucci 17/C, Rende 87036, Italy
  • 收稿日期:2017-02-09 修回日期:2017-04-17 出版日期:2018-02-28 发布日期:2018-03-16
  • 通讯作者: Zhaoliang Cui, Zhaohui Wang
  • 基金资助:

    Supported by the National Natural Science Foundation of China (2160060639), the Natural Science Foundation of Jiangsu Province (BK20160984), and the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry (ZX15511310002).

Insight into fouling behavior of poly(vinylidene fluoride) (PVDF) hollow fiber membranes caused by dextran with different pore size distributions

Kailiang Zeng1,2, Jie Zhou1,2, Zhaoliang Cui1,2, Yue Zhou1,2, Chuan Shi1,2, Xiaozu Wang1, Liyue Zhou3, Xiaobin Ding3, Zhaohui Wang1,2, Enrico Drioli4   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2 National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China;
    3 Nanjing Jiuying Membrane Technologies Co., Ltd., Nanjing 211899, China;
    4 Research Institute on Membrane Technology, ITM-CNR, Via Pietro Bucci 17/C, Rende 87036, Italy
  • Received:2017-02-09 Revised:2017-04-17 Online:2018-02-28 Published:2018-03-16
  • Contact: Zhaoliang Cui, Zhaohui Wang
  • Supported by:

    Supported by the National Natural Science Foundation of China (2160060639), the Natural Science Foundation of Jiangsu Province (BK20160984), and the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry (ZX15511310002).

摘要: Membrane fouling is the key problem that occurs in membrane process for water treatment. However, how membrane microstructure influences the fouling behavior is still not clear. In this study, fouling behavior caused by dextran was deeply and systematically investigated by employing four poly(vinylidene fluoride) (PVDF) membranes with different pore sizes, ranging from 24 to 94 nm. The extent of fouling by dextran was accurately characterized by pore reduction, flux decline, and the change of critical flux. The result shows that membrane with the smallest pore size of 24 nm experienced the smallest fouling rate and the lowest fouling extent. As the membrane pore size increased, the critical flux ranges were 105-114, 63-73, 38-44 and 34-43 L·m-2·h-1, respectively. The critical flux and fouling resistances indicated that the fouling propensity increases with the increase of membrane pore size. Two pilot membrane modules with mean pore size of 25 nm and 60 nm were applied in membrane filtration of surface water treatment. The results showed that serious irreversible membrane fouling occurred on the membrane with pore size of 60 nm at the permeate flux of 40.5 L·m-2·h-1. On the other hand, membrane with pore size of 25 nm exhibited much better anti-fouling performance when permeate flux was set to 40.5, 48 and 60 L·m-2·h-1.

关键词: PVDF membrane, Fouling behavior, Pore size distribution

Abstract: Membrane fouling is the key problem that occurs in membrane process for water treatment. However, how membrane microstructure influences the fouling behavior is still not clear. In this study, fouling behavior caused by dextran was deeply and systematically investigated by employing four poly(vinylidene fluoride) (PVDF) membranes with different pore sizes, ranging from 24 to 94 nm. The extent of fouling by dextran was accurately characterized by pore reduction, flux decline, and the change of critical flux. The result shows that membrane with the smallest pore size of 24 nm experienced the smallest fouling rate and the lowest fouling extent. As the membrane pore size increased, the critical flux ranges were 105-114, 63-73, 38-44 and 34-43 L·m-2·h-1, respectively. The critical flux and fouling resistances indicated that the fouling propensity increases with the increase of membrane pore size. Two pilot membrane modules with mean pore size of 25 nm and 60 nm were applied in membrane filtration of surface water treatment. The results showed that serious irreversible membrane fouling occurred on the membrane with pore size of 60 nm at the permeate flux of 40.5 L·m-2·h-1. On the other hand, membrane with pore size of 25 nm exhibited much better anti-fouling performance when permeate flux was set to 40.5, 48 and 60 L·m-2·h-1.

Key words: PVDF membrane, Fouling behavior, Pore size distribution