EDI – CEDI Systems Advanced Electrodeionisation and Automation Solutions for High-Purity Water Production
EDI (Electrodeionisation) and CEDI (Continuous Electrodeionisation) systems are advanced purification technologies used in industries requiring high-purity water production. These systems work by combining ion exchange resins, electrical potential and semi-permeable membrane structures to remove ionic impurities from water. This technology, which does not require chemical regeneration, provides uninterrupted and stable purification performance.
Automation infrastructure is critical for EDI–CEDI systems to operate most efficiently. Automation enables the monitoring of feed water quality, current and voltage control, ion removal efficiency, membrane protection processes, and system alarm management. This allows high-purity water to be produced continuously and reliably.
Working Principle of EDI–CEDI Systems
Unlike conventional ion exchange technologies, EDI/CEDI systems utilise electrical energy. This energy facilitates the transport of ions from the resin to the membrane channels. Consequently:
- Continuous operation is ensured,
- The need for chemical regeneration is eliminated,
- Scale formation is minimised,
- Continuous production of high-purity water is possible.
For this reason, it is the most preferred technology as a second treatment stage after RO (Reverse Osmosis) systems.
Advantages of EDI–CEDI Systems
The main advantages offered by EDI and CEDI technologies are as follows:
- Ultra-pure water production up to 18+ MΩ·cm
- Environmentally friendly purification technology that does not require the use of chemicals
- Uninterrupted production thanks to continuous regeneration
- Low operating and maintenance costs
- Ease of capacity expansion with modular design
- Seamless compatibility and high efficiency with RO systems
Thanks to these features, EDI/CEDI systems are widely used in sectors requiring high purity, such as pharmaceutical production, microelectronics, laboratory applications, and power plants.
The Importance of Automation in EDI – CEDI Systems
Producing high-purity water requires precise process management. Automation controls the elements that directly determine system performance:
- Real-time monitoring of conductivity and resistivity values
- Current and voltage control
- Continuous monitoring of feed water quality (pH, TDS, temperature)
- Automatic start-stop cycles for membrane protection
- Fault and anomaly detection system
- Remote monitoring and data logging with SCADA
- Energy optimisation
EDI–CEDI automation minimises human error while ensuring the continuity of ultra-pure water quality.
Application Areas
EDI and CEDI systems are extensively used in the following sectors:
- Pharmaceutical and biotechnology production
- Microchip, electronics and semiconductor industry
- Power plants (boiler feed water preparation)
- Laboratories and R&D centres
- Process water preparation in the food and beverage industry
- Precision metal plating and surface treatment facilities
These systems are the ideal solution for both high-quality water processes and environmentally friendly, chemical-free operating models.
Ultra-pure Water Production with Professional EDI–CEDI Solutions
The successful operation of an EDI/CEDI system depends on the perfect harmony of correct design, appropriate membrane selection, feed water quality, energy settings, and automation infrastructure. A professionally designed system:
- Provides lower operating costs,
- Extends membrane life,
- Maintains process water quality at a consistently high level,
- Offers full compliance with environmental regulations.
If your facility requires a reliable, automation-supported EDI–CEDI solution that produces high-purity water, our expert team is ready to design the most suitable system for you.