Electrodialysis System
Working of Electrodialyser systems
Electrodialysis is a membrane-based process by which electrically charged membranes are used to separate ions from an aqueous solution by the driving force of electrical potential difference.
Applications:
- Removal of acids and salts from pharmaceutical industries
- Desalination of salt water and brackish water
- Recovery of water and valuable metal ions from effluent
Advantages
- The ED system separates without changing phases, resulting in reduced energy use.
- The ED system is ideal for distinguishing non-ionized from ionized components since it exclusively eliminates ionized species.
Disadvantages
- The ED system does not remove organic debris, colloids, or SiO2.
- To keep ED stacks from clogging, feedwater must be pre-treated.
- The building materials for membranes and stacks must be chosen carefully to ensure compatibility with the feed stream.