Two separation technologies, membranes and ion exchange, are combined into one sealed, self-contained unit. The primary use of EDI has focused on RO permeate polishing. This technology is widely used in industry as a final polisher replacing traditional ion exchange units which required chemical regeneration using base and acid reagents.
Anderson systems incorporate E-Cell™ technology which is a combination of flat sheet membranes and ion exchange resin. A combination of pressure and electrical driving force allows this technology to produce very high purity water for industrial applications.
Modular design and process specific criteria allows the greatest flexibility in providing skids that industry requires for the production of high purity water used in their facilities.
The fundamental principle of EDI technology is the use of pressure and electrical current to separate soluble ions from water through a semi permeable material which includes both cationic and anionic membranes. Each cell incorporates specific ion exchange resin between the two types of membranes allowing negative and positive ions to only pass through one of the membranes.
The resulting product stream is high purity water and a concentrate stream which is usually recycled back to an upfront RO system for reprocessing.
Main features of Anderson EDI systems:
Custom Build and Modular Units
High rejection of soluble ionic load up to 98+%
No chemical regeneration required : Electrical current to continuously regenerate the resin inside the cell
Download the Anderson EDI product brochure here.