膜科学与技术

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Discussion on the optimum design of nanofiltration system

Authors： BiFei,ZhangLin,WuLiguang,ChenHuanlin,GaoCongjie

Units： 1.Department of Chemical and Biological Engineering, Center of Membrane and Water Treatment, MOE, Zhejiang University, Hangzhou 310027, China; 2.College of Envir. Sci. & Eng., Zhejiang Gongshang University, Hangzhou 310035, China; 3. National Engineering Research Center for Liquid Separation Membrane，Hangzhou 310012, China

KeyWords： nanofiltration;membrane system;concentration polarization;recovery;system design

ClassificationCode：TQ028;TQ085+.4

year,volume(issue):pagination： 2012,32(3):11-16

Abstract：

In recent years, the large scale application of nanofiltration membrane technology has been concerned widely in water treatment. The model of nanofiltration system design should be various rather than a simple simulation of reverse osmosis system design for the characteristics of nanofiltration with the variety membrane material, wide range of solutes rejection and complex separation mechanism. In this paper, NF270 polyamide nanofiltration membrane is picked as the research object. Discussed the impacts of concentration polarization on commercialized nanofiltration membrane performance in different type of inorganic salt solution under different conditions including pressure, flow, salinity concentration, temperature and pH value. Compared with reverse osmosis membrane separation performance and system design, some reasonable suggestions of system design are given for such type nanofiltration membrane under a certain salinity range of feed water: 1) operating pressure is independent with the salinity of feed water; 2) system recovery is irrelevant to the process length; 3) the salt retention rate only depends on the recovery. Attempt to provide a theoretic basis for a new model of nanofiltration system design and do some preliminary exploration for creating a complete nanofiltration design model.

Funds：

973基础研究项目（2009CB623402）；国家水专项（2009ZX07424-001）；浙江省重大科技专项（2009C03006-2）

AuthorIntro：

毕飞（1979～），男，博士生，从事膜法水处理技术应用过程开发与膜污染预防与控制研究北京坎普尔环保公司市场总监；通讯联系人：陈欢林教授，博士生导师，长期从事膜法水处理技术的基础研究与应用过程开发，电话:0571-87953802，; email:chenhl@zju.edu.cn;

Reference：

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