Many ion-exchange membranes are integrated in an electrodialyzer. Electrodialyzers are arranged to form an electrodialysis process. The electrodialyzer is classified to a sheet flow type operated with an one directional direct current and a tortuous flow type operated with a two directional direct current. The electrodialysis (ED) process is operated with an one directional current. The electrodialysis reversal (EDR) process is operated with periodic reversal of two directional currents. Both processes have extremely unique features and are applied according to the requirements for the process.
2.1. Structure of an Electrodialyzer and Process Operations
The basic structure of an electrodialyzer consists of stacks in which cation-exchange ...