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Electrodialysis technology Electrodialysis (ED) is a type of membrane separation technique. Under the influence of a direct current electric field, and driven by a potential difference, it makes use of the selective permeability of ion exchange membranes to separate electrolytes from solutions, thereby achieving the purposes of desalination, concentration, extraction of essential components, or purification of solutions. In water treatment, this technology was first used for desalinating brackish water, and later its application was expanded to seawater desalination (seawater desalination equipment) as well as water treatment for producing industrially pure water (pure water systems, pure water equipment). It has also been utilized in the treatment of industrial wastewater such as that containing heavy metals and radioactive substances. Today, it has become an important water treatment method that is receiving increasing attention. Zhejiang Qianqiu Environmental Water Treatment Co., Ltd. began researching electrodialysis in the early 1980s, and the heterogeneous ion exchange membranes it developed are widely used by electrodialysis equipment manufacturers across the country. Since the new century, the company has focused on applying electrodialysis in specialized separation fields, achieving excellent results in the food, pharmaceutical, chemical industries, and wastewater treatment projects. Features of electrodialysis technology: (1) There is no phase change during the process; only electrical energy is used to move ions in water. Under certain salt concentrations, electrodialysis is considered a technology with low energy consumption ； http://www.china-qianqiu.com/UserFiles/Image/tub.gif (2) The manufacturing process is clean, with low consumption of chemicals and minimal environmental pollution ； (3) The device design and system application are flexible, enabling easy operation and maintenance ； (4) The raw water recovery rate is high, generally ranging from 65 to 80% ； (5) The preprocessing is simple, and the equipment is durable. Application areas of electrodialysis technology: (1) Water treatment projects: Desalination of brackish water ； (2) Power industry: Preparation of boiler make-up water ； (3) Pharmaceutical industry: Desalination and purification of drugs ； (4) Food industry: Desalination of fruit juices, desalination of whey ； (5) Wastewater treatment project: Treatment of industrial wastewater to extract valuable components.