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SnowPure/Electropure Exhibiting at Aquatech China 2019

Aquatech China June 2019

It’s June 2019 and we are exhibiting again at the largest water exhibition in the world — Aquatech China 2019. SnowPure is part of this, and you can find us in Hall 5, Floor 1, Stand H460. (5.1.H460). Electropure China, Electropure Environmental Technology (Shanghai) Co., Ltd., is again co-located with Shanghai Yuan Mai Environmental Technology. … Read more

Electrodeionización Para Generación de Energía y Farmacéutica

Ultrapure Water for Mexico

In México, EDI (Electrodeionización) is used to produce pure and ultrapure water for both Generación de Energía y Farmacéutica (USP PW y WFI). SnowPure works in México with OEMs to choose technologies and processes that will enable good performance and long life for RO (OI) and EDI Electrodeionization (Electrodeionización). The primary challenge in México is … Read more

SnowPure Water at Aquatech Mexico September 2018

SnowPure Water Technologies was in the prime position in the USA Pavilion at the 2018 Annual Aquatech Mexico Exhibition. We discussed and showed electrodeionization (EDI), RO membranes for dealing with high silica feedwaters, DC power supplies, and pharmaceutical, laboratory, hospital and hemodialysis, and power generation applications. The 2017 exhibition was a success, and 2018 will … Read more

FCE is Important for EDI Electrodeionization System Performance

EDI, Why FCE is Important for Electrodeionization System Performance FCE is Important for EDI System Performance. Electrodeionization systems depend on conductivity, CO2, and Silica; all brought together by using FCE, or Feedwater Conductivity Equivalent. For an electrodeionization system to operate properly, the feed water must be high-quality Reverse Osmosis (RO) permeate. An RO permeate water … Read more

History of Electrodeionization

Electrodeionization (EDI) history extends back to the mid-1970’s in the USA. Possibly back to Argonne National Labs in the 1950’s as a scientific novelty. However, the first working EDI modules were made by Harry O’Hare in 1977 and 1978, and were tested by the Southern Research Institute (SRI).  The concept was “filled-cell ED”, an attempt … Read more

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