CDI device is characterized in that the ion exchanging resin is filled between anion exchanging membrane and the cation exchanging membrane so as to form a CDI unit, the highly purified water is prepared by the resin, the ions H+ and OH generated by water electrolysis are utilized so as to re-generate failed resins in membrane stacks.

CDI is an abbreviation of CEDI (Continuous electroedionization), which is a novel super-purified water preparing technology. After the CDI device is arranged in the reverse osmosis system and the deep desalting is carried out, the super-purified water of 15-18MΩ.cm can be prepared.

World Health Organisation (WHO) guidelines are generally followed throughout the world for drinking water quality requirements. In addition to the WHO guidelines, each country or territory or water supply body can have their own guidelines in order for consumers to have access to safe drinking water.

EDI (Electrodeionization) is a revolutionary technology for water treatment. This technology uses the demineralization process of electrical regeneration ion exchange instead of traditional demineralization process of mixed ion exchange DI.