EDI, also known as CEDI, is a new desalting process combined with ion membrane technology and ion electromigration technology.

It is mainly used for the preparation of high purity water.

Raw water is initially desalted by RO reverse osmosis, and then treated by CEDI, the desalting rate is up to 99.9%, and the highest pure water with a resistivity of 18.0 MΩ·cm can be produced.

In this process, the advantages of electrodialysis and ion exchange are used to make up for the disadvantages of each other. In other words, the deep desalting of ion exchange kinetic energy is used to overcome the electrodialysis polarization and the desalting is not complete.

In addition, the hydroionization generated by the electrodialysis polarization generates H+ and HO- ions to realize the resin self-regeneration to overcome the defects of the resin regeneration through chemical agents after the failure. So CEDI technology is a perfect desalting process.

7.0-9.0

1.4-6.9 bar

>16-18 MΩ.cm

>95-99%

>99%

< 45 μS/cm (include CO2/Si)

5-45°C

90-95%

>99%

>99%

1. A higher and more stable water quality of the product;

2. Don't need to acid and alkali regeneration;

3. Continuous operation, the operation is simple;

4. Installation requirements is low, the cost is low;

5. Membrane system, more flexible, easy to expand;

6. Do not produce chemical waste;

7. Reduce facilities required;

8. Operation maintenance cost is low;

9. Reasonable structure and small footprint;

10. Easily with the existing water system integration;

11. No recycling - to increase reliability.

Pure water system

© 2024 Guangdong Nuopu Environmental Protection Technology Ltd. Trademarks and brands are the property of their respective owners.

CEDI (Continuous Electrodeionization)

Water treatment consumables