In the 1950s’, electrodeionization (EDI) technology was invented in an attempt to minimize or eliminate polarization phenomenon concentrations that were present in electrodialysis systems. Decades later, the technology was applied to polish reverse osmosis product water and generate chemical free high purity water.
Today, many OEMs use EDI. Electrodeionization technology uses ion-exchange resin media to remove dissolved ions, and ion exchange membranes to transport the ions into a concentrated waste stream. A DC electrical current is employed to regenerate the resin by water splitting, and simultaneously remove the ions by electrical charge. The electrical current continuously regenerates the resin, effectively eliminating any need for periodical regeneration. Therefore, EDI eliminates hazardous regeneration chemical products required by other conventional ion exchange methods
Electrodeionization Technology Offers a Scalable Water Solution
The building block of EDI is a cell pair that includes a cation exchange membrane to remove cations, an anion exchange membrane to remove anions, and mixed bed resin. Multiple cell pairs are placed between 2 electrodes: a cathode and an anode. Just a small number of cell pairs are required for low flow rates, while multiple cell pairs are used for high flow rates. The assembly of cell pairs between electrodes is called an EDI module or an EDI stack. While some systems are less than 1 gallon per minute (gpm) with a single module, higher flow rate systems use multiple modules or stacks. Some systems have been installed as high as 3,000 gpm or even more.
What Industries Could Benefit from Electrodeionization Technology?
Electrodeionization technology can be used for many different applications that require the constant, economic removal of impurities from water without using any dangerous chemicals. Power plants use an electrodeionization solution to treat city water, well water or surface water. Semiconductor manufacturers use EDI to produce near theoretical purity water. Other industries that could benefit from electrodeionization technology include cosmetics, electronics, biotechnology, chemical production, pharmaceuticals, and laboratories. You can depend on electrodeionization technology to perform reliably and provide the production of high purity water needed to complete manufacturing processes.
Consider EDI to Be the Perfect Substitute for Traditional Ion-Exchanges
EDI brings many advances in relation to operating and maintenance expenses. When you eliminate the need for the periodic water regeneration for ion exchange resin, there are many environmental benefits. Your employees won’t have to handle and process caustic chemicals nor acid either. Other advantages of using EDI include continuous and simple operation, cost-effective maintenance and operation. The use of chemicals for regeneration purposes is completely eliminated, its reliable, safe, and a non-pollutant, lower power use, fewer complex control sequences, and automatic valves need to be supervised, it products a constant flow of high purity water, requires little space, provides the complete removal of dissolved particles that are inorganic, and can be used in combination with a reverse osmosis pre-treatment.
Speak with Leading Experts About EDI
Speak with leading manufacturers of EDI systems. They are ready to partner with you as water treatment equipment suppliers offering complete systems, supply components, technical support, and necessary training for water treatment establishments. You can depend on them to supply the EDI modules you need so you can build your system too.
Are you worried that you don’t have the time or experience needed to put together a successful system? Top EDI providers like Agape Water Solutions can also supply you with designs that are designed and constructed to meet your requirements for pre-treatment including an industrial reverse osmosis system. If you are a water treatment company that would like to add EDI to your RO product line, Agape Water Solutions can help with private label systems.