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An Integrated Low Energy Comsumption HRNF-LPRO Membrane Process for Seawater Desalination

Authors： Dong Zhou1,2，Yin-yi Fu1*，Lin-XinXue1**，Li-jing Zhu1，Ming-He Zhu2

Units： 1Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies,1219Zhongguanxi Road, Ningbo 315201, P.R. China; 2Faculty of Maritime and Transportation, Ningbo University, 818 Fenghua road, Ningbo 315211, P.R. China

KeyWords： high rejection nanofiltration membrane;low pressure reverse osmosis;seawater desalination, energy saving;lower cost

ClassificationCode：TQ028.8；TQ95

year,volume(issue):pagination： 2016,36(3):62-69

Abstract：

The salt rejection in the first stage of current nanofiltration-reverse osmosis (NF-SWRO) seawater desalination process is not high, resulting in high operation pressure of second stage and high energy consumption. This study proposed the high rejection nanofiltration-low pressure reverse osmosis (HRNF-LPRO) desalination process. In the NF desalting experimental study, The overall Total Dissolved Solids(TDS) rejection of HRNF-LPRO process was 99.84%, when the TDS of feedwater was 34998mg/L and the operation pressure of the two desalination process were 2.6MPa and 1.4MPa, respectively. If the feedwater TDS was 34967.39 mg/L, ROSA simulation showed that the TDS of permeate should be as low as 231.17 mg/L and the overall energy consumption of product water would reduce to 3.264 kWh/m3. The HRNF-LPRO integrated process is of great significance for reducing the pressure of the second desalination process and the equipment requirements, saving costs of water production.

Funds：

国家科技部863项目（2014BAJ02B02），宁波市科技创新团队（2014B81004），宁波市自然科学基金（2013C910012，2014A610137， 2014A610138和2014B70023），宁波市智团创业项目（2014B70023），宁波市农业创新创业项目（2013C910012）和宁波市重大工业攻关项目（2015B11041）的支持，同时感谢中国科学院宁波材料技术与工程研究所“旗舰计划”和绍兴市330人才项目基金的大力支持。

AuthorIntro：

作者简介：周栋（1988-），男，湖北孝感人，硕士生，从事膜材料制备及应用研究。通讯联系人*，Email: fuyinyi@nimte.ac.cn, xuelx@nimte.ac.cn,

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