SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (12): 1674-1679.DOI: 10.1016/j.cjche.2016.05.012

• Separation Science and Engineering • 上一篇    下一篇

Optimal design of nanofiltration system for surface water treatment

Fei Bi1, Haiyang Zhao2, Zhijun Zhou1, Lin Zhang1, Huanlin Chen1, Congjie Gao1,3   

  1. 1 Key Laboratory of Biomass Chemical Engineering of MOE, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
    2 96657 Unit of the Armed Forces, Beijing 100011, China;
    3 Ocean College, Zhejiang University of Technology, Hangzhou 310014, China
  • 收稿日期:2016-01-24 修回日期:2016-05-15 出版日期:2016-12-28 发布日期:2017-01-04
  • 通讯作者: Lin Zhang,Tel.:+8657187953802.E-mail address:linzhang@zju.edu.cn
  • 基金资助:
    Sponsored by the National Natural Science Foundation of China (51578485, L1422037), the National Basic Research Program of China (2015CB655303) the Research Fund for the Doctoral Program of Higher Education of China (No. 20130101110064) and the National Sustain Plan Program of China (2015BAB11B01).

Optimal design of nanofiltration system for surface water treatment

Fei Bi1, Haiyang Zhao2, Zhijun Zhou1, Lin Zhang1, Huanlin Chen1, Congjie Gao1,3   

  1. 1 Key Laboratory of Biomass Chemical Engineering of MOE, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
    2 96657 Unit of the Armed Forces, Beijing 100011, China;
    3 Ocean College, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2016-01-24 Revised:2016-05-15 Online:2016-12-28 Published:2017-01-04
  • Supported by:
    Sponsored by the National Natural Science Foundation of China (51578485, L1422037), the National Basic Research Program of China (2015CB655303) the Research Fund for the Doctoral Program of Higher Education of China (No. 20130101110064) and the National Sustain Plan Program of China (2015BAB11B01).

摘要: Both reverse osmosis (RO) and nanofiltration (NF) membranes have been increasingly used for water purification and desalination. However, the salt rejection of NF membranes is quite different from that of RO membranes, which makes a significant distinction in their process designs. This work started from the performance investigation of a single NF membrane element and then focused on the process design of the NF system for surface water treatment. In experimental tests, it was found that the observed rejection of the NF element becomes nearly constant when the concentrate flow is large enough, while the membrane flux of the NF element is quite stable regardless of the water flow across the membrane surface. These findings can be used to instruct the process design of the NF system for surface water treatment. In process design, a two-stage arrangement is sufficient for the NF system to reach the highest water recovery, while the RO system requires a three-stage arrangement.

关键词: Nanofiltration, System design, Salt rejection, Surface water, Recovery

Abstract: Both reverse osmosis (RO) and nanofiltration (NF) membranes have been increasingly used for water purification and desalination. However, the salt rejection of NF membranes is quite different from that of RO membranes, which makes a significant distinction in their process designs. This work started from the performance investigation of a single NF membrane element and then focused on the process design of the NF system for surface water treatment. In experimental tests, it was found that the observed rejection of the NF element becomes nearly constant when the concentrate flow is large enough, while the membrane flux of the NF element is quite stable regardless of the water flow across the membrane surface. These findings can be used to instruct the process design of the NF system for surface water treatment. In process design, a two-stage arrangement is sufficient for the NF system to reach the highest water recovery, while the RO system requires a three-stage arrangement.

Key words: Nanofiltration, System design, Salt rejection, Surface water, Recovery