EDI Systems

  1. Home
  2. Categories

CATEGORIES

Electrodeionization (EDI) is a technology in which anionic and cationic ions in water are removed from the water by the integrated operation of ion exchange resins and electrical energy, obtaining ultra-pure water.
Prior to electrodeionization (EDI) systems, the first step is to use Reverse Osmosis units which are the latest technology. Purified water (<50 mS / cm) is obtained by providing 95-99% ion removal with membranes used in Reverse Osmosis unit.
Electrodeionization (EDI) systems are the second stage in the production of ultra-pure water (<0,05 mS/cm), and the systems that produce ultra-pure water by removing ions from the reverse osmosis production water from the water.  

ADVANTAGES OF EDI SYSTEM

  • EDI units are mechanically simpler than typical renewable ion exchange systems
  • EDI units can operate 24/7 continuously without waiting for deionization regeneration.
  • In EDI systems, product water quality does not change over time, but in renewable ion removal, product water quality decreases as the resin begins to enter the saturation phase.
  • The most significant benefits of EDI systems are the elimination of the regeneration process and the absence of hazardous regeneration chemicals - acids and caustics.
  • In EDI systems, there are no labor and chemical costs of regeneration, instead it consumes a small amount of electricity. Since the EDI concentrate (or reject) stream contains 5 to 20-fold high concentrations of pollutants in the feed water alone, it is often discharged without the need for purification, or used in other processes.
  • With the elimination of hazardous chemicals, workplace health and safety can be increased. Nowadays, with increasing regulatory impacts, workplaces, storage, use, neutralization and elimination of hazardous chemicals cause additional costs such as documentation and surveillance to meet the requirements set out by law.

Since most of the pollution in the water consists of dissolved salts, the deionization process generally produces high-purity water close to pure water, which is rapid and prevents the formation of sediment as a result of precipitation.