Electrodeionization Technology:
Electropure™ EDI technology stands apart with fundamental advantages that distinguish it from other EDI products. While it shares some similarities, Electropure delivers 4 key technical advantages that provide superior performance and reliability.
Basic EDI Technology:
EDI is a continuous membrane deionization process in which a DC electric field is used to remove charged ions from an aqueous stream. EDI is used with reverse osmosis (RO) to replace ion exchange resin mixed beds (MBDI), which require onsite or offsite chemical regeneration.
How Does EDI Work? – A Detailed Tour
Electrodeionization (EDI) …
… uses no chemicals, generates no hazardous waste, and makes ultrapure water continuously.
See Electropure electrodeionization EDI products for more information
Unique Electropure™ EDI Technology Differences
There are four innovative key technical advantages in Electropure EDI. These enable Electropure modules to have higher efficiency and longer life, with less maintenance and fewer problems.
1. Thin-Cell Technology
Electropure EDI has always benefited from its uniquely thin cell design. In EDI systems, ions must be driven horizontally out of the cell before they reach the top. With a cell width of just 4 mm (compared to approximately 10 mm in Ionpure® and E-Cell®), Electropure XL cells deliver superior efficiency and consistently higher water quality.
2. Thin-Concentrate Technology
At just 700 microns thick, Electropure™ EDI incorporates an ultra-thin insert screen, woven with exceptionally fine fibers. This design promotes turbulence at the membrane surface, which helps maintain a near-neutral pH and keeps the membranes clean while minimizing fouling and scaling. The thin construction also reduces current requirements, further improving efficiency.
3. Non-Filled Concentrate Technology
Electropure also avoids the use of a “filled concentrate” (a design patented by O’Hare in 1981) that is prone to long-term fouling issues. Instead, we have deliberately rejected this approach, ensuring greater reliability and cleaner operation over time.
4. Non-fouling Electrode Technology
Electropure EDI also features a proprietary design that ensures the electrodes remain on the acidic side, preventing scaling, and improving long-term reliability. Additionally, a specialized anode technology minimizes chlorine production, significantly extending the life of the EDI module.
Contact SnowPure to request technical literature, or visit our Knowledge Base pages for a variety of articles and manuals.
Electropure Electrodeionization EDI:
- Enables a simpler system
- Produces ultrapure water (up to 18.2 megohm.cm)
- Eliminates regeneration chemicals and hazardous waste
- High recovery, up to 99%
- Single unit capacities ranging from 1/4 gpm to 44 gpm (60 l/hr to 10 m3/hr)
- Multiple unit arrays up to 6000 gpm (1400 m3/hr)
- Compact, durable, long-lifetime patented design
Click here to see our complete line of Electropure EDI Modules
