In industries where precision and purity drive performance—such as power generation, pharmaceuticals, and microelectronics—meeting ultra-pure water standards is non-negotiable. That’s where continuous electrodeionization (CEDI) comes in. This advanced water treatment technology delivers consistent high-quality water while reducing chemical use and operational costs. If your facility is looking to improve efficiency and sustainability, contact Fact Water Co. today to explore how continuous electrodeionization can fit into your process.
What Is Continuous Electrodeionization?
Continuous electrodeionization is a water purification process that combines ion exchange membranes and resins with an electrical current to remove ionized species from water. It serves as a polishing step after reverse osmosis (RO), producing water with resistivity up to 18.2 MΩ·cm—nearly the theoretical limit of purity.
Unlike conventional deionization systems that rely on resins requiring periodic chemical regeneration, CEDI systems continuously regenerate the ion exchange medium using electricity. This means no downtime, no acid or caustic use, and a consistent production of high-purity water.
How Continuous Electrodeionization Works
The CEDI process uses a modular setup composed of alternating layers of ion exchange resins and ion-selective membranes. When an electrical potential is applied:
- Cations migrate toward the negatively charged cathode through cation-selective membranes.
- Anions move toward the positively charged anode through anion-selective membranes.
- The central compartment is continuously purified, while ions are swept away into concentrate streams.
Because the electric field maintains the resin in a regenerated state, the system operates continuously without interruption for regeneration or maintenance cycles.
Advantages of Continuous Electrodeionization
Implementing continuous electrodeionization offers several key benefits across industrial operations:
- High water quality: Consistent production of ultra-pure water ideal for critical processes.
- Chemical-free operation: Eliminates the need for acid and caustic regenerants.
- Lower operating costs: Reduced maintenance and chemical handling lead to long-term savings.
- Sustainability: Environmentally friendly process that minimizes waste generation.
- Compact and scalable: Modular design allows easy integration with existing RO systems.
Applications Across Industries
CEDI technology is widely used wherever ultrapure water is essential:
- Power plants: Boiler feedwater and turbine systems.
- Pharmaceutical production: Purified and water-for-injection (WFI) processes.
- Microelectronics manufacturing: Rinsing and wafer fabrication.
- Laboratories and research facilities: Analytical and testing applications.
Partner with Fact Water Co.
At Fact Water Co., we specialize in engineering, installing, and supporting continuous electrodeionization systems tailored to your industry’s exact standards. Our experts work with you to design energy-efficient, low-maintenance water treatment solutions that enhance reliability and compliance.
If your business is ready to advance to the next level of water purity, reach out to Fact Water Co. today to discuss whether continuous electrodeionization is right for your operation.