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Electrodeionization (EDI) using Voltage Control

In electrodeionization, DC voltage is the force for driving ions out of the stream to be purified. Current is a result of the movement of ions. Both as a matter of physics and as a practical matter, SnowPure recommends using “Voltage Control” for EDI: set the DC voltage potential to the EDI system and walk … Read more

Electrodeionization is a Continuous Process

Unlike mixed bed DI, electrodeionization (EDI) is continuous. Because electrodeionization is continuous there are no spikes in quality as when mixed beds are changed for batch regeneration. An additional benefit for EDI users is that there is no concern about the timing of changing batches, or planning for the eventual breakthrough of ions in the … Read more

For EDI: 1-pass or 2-pass RO?

What are the advantages and disadvantages of single pass and double pass RO as pretreatment for EDI?  Electrodeionization must be pretreated with RO for numerous reasons. Many Electrodeionization (EDI) systems using Electropure™ EDI perform very well with 1-pass RO.  It’s easy to achieve 17+ Megohm with 1-pass RO.  Most USP WFI and Purified Water systems … Read more

Heat Sanitization Basics for Ultrapure and Pharmaceutical Water

Hot water sanitization of EDI is important for Ultrapure Pharmaceutical Water. Even small numbers of bacteria are a problem for critical water systems like pharmaceutical USP water, dialysis water, and ultrapure water for semiconductor manufacturing. Bacteria are often killed with UV-254, chemicals, and heat. Chemical sanitization is often undesirable or prohibited, creating a steady change-over to pure water systems … Read more

Electrodeionization for Power Plants — Importance of Silica

Silica is important in high purity water for power plants. Electrodeionization makes low silica water continuously if you do it correctly. Power plants use high purity water to drive steam turbines. Cogeneration and combined-cycle power plants are highly-efficient, using both exhaust turbines and high-pressure steam turbines. The steam must be of the highest purity. In … Read more

Operating Electrodeionization in a High-Silica Feedwater Environment

High silica feedwaters pose two challenges for ultrapure water membrane systems. On the front end, silica can scale the RO membranes, limiting use of some feedwaters and high water recovery. On the back end, silica can scale the IX resins in the electrodeionization (EDI). It is also a challenge to attain the very low ppb … Read more

SnowPure Water Technologies Honored with Prestigious Export Award

March 21, 2018–NASBITE International Celebrates Exporting Excellence by Honoring U.S. Firms with Prestigious Export Award, including SnowPure Water Technologies in California —  Today, NASBITE International honored 31 U.S. companies that export goods and services during the 2018 National Small Business Exporter Summit in Baltimore, Maryland.  Companies representing 24 states, were recognized as Outstanding Exporters in … Read more

SnowPure Receives 2017 U.S. Presidential “E” Award

MAY 25, 2017 — SnowPure Water Technologies, which makes and sells industrial and medical water purification technologies, was presented the 2017 U.S. Presidential “E” Award. This award is the highest recognition any U.S. entity can receive for making a significant contribution to the expansion of U.S. exports and is given to only a few select companies … Read more