Continuous Electronic Deionizatio – What is inside?
Continuous Electronic Deionization Stack
This week we took a look at what is inside a Continuous Electronic Deionization Stack. Continuous Electronic Deionization is also known as CEDI or EDI. CEDI is commonly used in high purity water applications such as, pharmaceutical water, power plant water make up, plating industries, labs and semiconductor. CEDI is typically used down stream of a Reverse Osmosis System to clean the water up more by removing additional Total Dissolved Solids (TDS) that made it past the RO.
CEDI has been around for many years and as time has passed the technology has improved along with water quality. Power consumption on these units are minimal compared to the water output. We have seen this equipment produce high purity water as good as 18.2 Meg Ohm or 0.055 microsiemens.
In this video we took apart one of these CEDI stacks to show you what is on the inside.
Need help with your CEDI or Want to explore if it makes sense for you?
Then contact the experts at Complete Water Solutions
(855) 787-4200Â Â Â info@complete-water.com
Published By Nathan Olszak
March 2nd 2021

With over 30 years of hands-on experience in the water treatment industry, Nathan Olszak is a trusted water treatment expert. He specializes in designing, engineering, and servicing water treatment systems. As the owner of Complete Water Solutions, Osmonics, and Membrane Cleaning Pro, Nathan has built a reputation for delivering customized water treatment solutions that enhance efficiency, reliability, and water quality across various industries, including the medical, commercial, and manufacturing sectors.
Nathan’s journey in water treatment began as a service technician. He gained in-depth knowledge by working with all major brands of equipment, including Veolia, Suez, Bruner, Culligan, Pentair, Aquamatic, Osmonics, GE Water, Marlo, Lakeside, Fleck, Autotrol, US Filter, ION Pure, Siemens, Evoqua, and many others. This hands-on expertise, combined with his technical certifications, has made him a leader in water system engineering and water management.
Credentials & Expertise
- Certifications: David H. Paul Reverse Osmosis Certification, PLC Programming
- License: Power Plant Operating Engineer 3rd Class
- Specialties:
- Design & engineering of water treatment systems and advanced water systems
- Custom water filtration systems and solutions
- Installation, automation, and repair of water treatment systems
- Expertise in Reverse Osmosis (RO), Deionization, Water Softening, Carbon Filtration, Iron Filtration, UV Treatment, Ultrafiltration (UF), Process Filtration, CEDI/EDI, and more
- Specialized knowledge in Boiler Feed Water, Tower Makeup Water, and drinking water production for industries such as bottling, pharmaceuticals, and food processing
- Project management and reclaiming of water system waste for other uses
- Evaluation of raw water sources and potential contamination risks
- Industrial water treatment strategies to prevent corrosion and optimize system performance
- Boiler water treatment to enhance energy efficiency and system longevity
Nathan’s commitment to excellence extends beyond equipment sales and service. He works closely with clients to develop tailored water treatment services that optimize performance and meet their operations’ unique demands. His expertise covers methods that mitigate water impurities, ensure fresh water accessibility, and maintain regulatory compliance. It also includes the design of high-efficiency reverse osmosis systems for industrial use.
Nathan focuses on the latest technology in water conditioning, water softeners, filters, and pumps to improve maintenance and efficiency. His experience in laboratory testing and biofilm control ensures the highest industry standards in water treatment processes and water management.Â
Additionally, his deep understanding of infrastructure and water data analysis provides long-term, cost-effective solutions that promote health and safety. His expertise ensures that businesses receive top-tier, quality water treatment solutions.
For insights into the latest industry trends, innovations, and best practices, explore the Complete Water Solutions Blog, where Nathan shares valuable information on water filtration systems, sustainability, and water solutions engineering. Â
Give Us A Call (855) 787-4200 or Email info@complete-water.com