Membrane Science and Technology

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The concentration of tea polyphenols from tea solution by forward osmosis

Authors： XU Longsheng1,2 LIU Qiming2 ZHANG Kaisong1

Units： 1.Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;

KeyWords： forward osmosis; draw solution; concentration; tea polyphenols; membrane fouling; membrane cleaning

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2015, 35(3):92-97

Abstract：

The performance of different draw solution concentration and different membrane materials for concentrating tea polyphenols from tea solution using NaCl as draw solution were investigated. The filtration performance, membrane fouling, membrane cleaning and the retention rate of tea polyphenols in the concentrate were also investigated. The results showed that steady flux and concentrate effect were obtained using NaCl as draw solution. PA - 4 M, CTA - 4 M and CTA - 2.7 M were used to concentrate the tea solution until the concentration ratio was up to 10 times. Then the fouled membrane were cleaned with NaOH (PH=10) for 25 min. The flux recovery rate were 100%, 95.9%, 96.1%, and the retention rate of tea polyphenols in the concentrate were 70%, 79.3% and 83.8% respectively. The results showed that CTA membrane is more suitable for concentration using 2.7 M NaCl as draw solution.

Funds：

厦门市对台科技合作项目（3502Z20131159）

AuthorIntro：

徐龙生(1989~ ),男,安徽巢湖人,硕士研究生,主要从事膜污染控制技术、膜生物反应器研究以及正渗透应用研究工作。通讯作者:张凯松, E-mail: kszhang@iue.ac.cn

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