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Electrodialysis (ED) machines are used to transport salt from one solution, the diluate, to another solution (concentrate) by applying an electric current. This is done in an electrodialysis cell providing all necessary elements for this process.The conentrate and diluate are separated by the membranes into the two different process streams. Once the electric current is applied, the salt will start to move over the membranes. Desalination of salt water is typical example of electrodialysis.