Investigation on characteristics and efficiencies of electro-dialysis technique for seawater desalination.

• Main Authors: Shu-Jen Chang, 張淑貞
• Other Authors: Jih-Hsing Chang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/98054192610231694610

碩士 === 朝陽科技大學 === 環境工程與管理系碩士班 === 95 === The potable and clean water for animals’ survival comes from the natural circulation and filtration. However, the natural circulation of water is too slow to provide human’s needs. As a result, people have to develop and search the new water resources to solve the problem of water shortage. The biggest water tanks in the world are seas and oceans. If people can obtain the fresh water from seas, we don’t have to worry the water resources, which seem to be the effective way to overcome the problem of water lack. Many desalination techniques were studied. Among those desalination techniques, electrodialysis (ED) can be used in the place with electricity and possesses the characteristics of selected inorganic removal and organic containing. Therefore, ED has been applied to the quality enhancement of potable water. The ions of Na+, Cl- , Ca+2 in the sea water should be removed for the usage in industries and livelihood. This research investigated the ionic removal characteristics of membranes in the ED system. The desalination of sea water is the main goal in this study. In addition, the comparison of ED and other desalination technique was conducted to assess the variance of cost, producing rate, and water quality. The ions removal rate of sea water can be achieved to 80% under our experimental conditions in the ED system. The quality of treated water can roughly meet the standard of potable water in Taiwan.