Dew India

EDI

Dew Electrodeionization products are the most advanced generation of Ion Exchange technology. It is a chemical-free process that uses ion exchange resins and electricity to produce ultrapure deionized water. Our products are environmentally friendly, operate with continuous production, and have extremely low operating costs when compared to chemically regenerated ion exchange technology.

Dew continuous electrodeionization modules utilize ion exchange resins primarily as a bridge to allow electric current to pass through the electrodeionization cell. This allows us to operate the modules without any brine injection or concentrate recycle. Additionally, the ion exchange resins are used to ‘polish’ the purified water stream by removing minute quantities of silica, carbon dioxide and other contaminants. The ion exchange resins are continually being regenerated by the dissociated hydrogen and hydroxyl ions that have been created by the electric current. Electrodeionization utilizes no chemical regenerants and creates no hazardous wastes.

Application in Power Plants, Microelectronics. Pharmaceuticals

  • Chemical-free operation.
  • Continuous production
  • Space savings – CEDI systems typically require less space than and DM system.
  • Operating Cost – The operating cost associated with a EDI system is electricity only.
  • Capital Cost – A EDI system is less than a DM system when all the associated storage tankage
  • Chemical regeneration systems and neutralization systems are included.

Power Plants Quality Needed

INDUSTRY NEEDSEDI
0.1 S/cm conductivity10-16 meg-ohm
Minimal downtimeContinuous production, no regeneration downtime
Silica removal, <10ppb95+% Silica removal
Sodium removal, <5ppb95+% Sodium removal
Low operating costsChemical-free process, just uses electricity
Safety, trend is to eliminate chemical usage

Chemical-free process, just uses electricity

Low maintenanceVery low maintenance vs. MBDI

Microelectronics Quality Needed

INDUSTRY NEEDSEDI
>16 megohm Resistivity16+ megohm resistivity
Minimal downtime/disturbanceContinuous production, no regeneration downtime
Silica removal, <10ppb95+% Silica removal
Boron removal, <5ppb90+% Boron removal
<1ppb TOC<1ppb TOC
No particlesNo particle shedding
Low operating costsChemical-free process, just uses electricity
Safety, trend is to eliminate chemical usageVery low maintenance vs. MBDI