Nanofiltration-Electrodialysis Hybrid Membrane Technology for Concentrating Brine from Seawater Desalination Process
Seawater desalination has become an important method to solve the global fresh water shortage. However, the disposition of concentrated brine was a troublesome problem it was facing because of the environment impact to the ocean. A novel nanofiltration-electrodialysis (NF-ED) hybrid membrane technology to concentrate the brine was proposed and investigated in this paper. And the monovalent-bivalent separation and brine concentration were realized in nanofiltration and electrodialysis separately. Two kind of brine (45100mg/L、 71000mg/L) was investigated. It was shown that all of the SO42- in the brine was rejected in NF, and the recovery ratio of NaCl could be higher than 50％. The concentration of NaCl after comcentrated in a batch ED process could be as high as 159 g/L (brine: 71000mg/L, membrane stack voltage: 15V), and the concentration of other ions was only 5.46 g/L. In a secondary ED concentrating process, the concentration of NaCl could be 174.7 g/L. The influences of membrane stack voltage were also investigated. Both of them has an obviously effects on the concentration and purity of salt solution. The results were shown that the NF-ED process was a feasible brine concentrating process both in economic and technology.
Brine Nanofiltration Electrodialysis Seawater desalination
Jie Liu Junsheng Yuan Zhiyong Ji Yinghui Xie Yingying Zhao Dongchan Li Xiaofu Guo Yanlan Liu
Engineering Research Center of Seawater Utilization Technology of Ministry of Education, Hebei University of Technology, Tianjian, 300130, People”s Republic of China
国内会议
青岛
英文
321-327
2012-06-26（万方平台首次上网日期，不代表论文的发表时间）