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EDI (Electrodeionization) Systems by Optima Water
Ultrapure Water. Zero Chemicals. Continuous Performance.
As a leading EDI System Manufacturer in India, Optima Water provides the ultimate solution for industries requiring high-purity water. Electrodeionization (EDI) is a revolutionary process that combines ion-exchange membranes and electricity to produce ultrapure water without the need for hazardous regeneration chemicals.
EDI is recognized as the most sustainable and cost-effective alternative to traditional Mixed-Bed (MB) ion exchangers.
- Chemical-Free Operation: EDI is a physical process rather than a chemical one. This eliminates the need to generate, handle, transport, or store toxic/hazardous acids and caustic chemicals for resin regeneration.
- Continuous Regeneration: The electrical field continuously regenerates the resin beads within the module. This means zero downtime for regeneration and a constant flow of ultrapure water.
- Environmental Sustainability: Because no regenerative chemicals are used, there are no harmful chemical neutralized waste streams to manage. It is the most ecological way to achieve high resistivity.
Safety First: There is no hazardous residual effect, making it completely safe for high-stakes environments like pharmaceutical labs and power plants.
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Common Questions
EDI Electrodeionization System — Frequently Asked Questions
What is EDI (Electrodeionization)?
Electrodeionization (EDI) is a water purification process that combines ion-exchange membranes, ion-exchange resins, and a DC electric current to continuously produce ultrapure water without hazardous chemical regenerants. EDI typically follows a Reverse Osmosis system and produces water with resistivity up to 18 MΩ·cm.
What is the difference between EDI and a Mixed Bed (MB) Ion Exchanger?
A Mixed Bed (MB) Ion Exchanger requires periodic regeneration using hazardous acids (HCl) and caustics (NaOH), resulting in chemical storage, handling risks, and downtime. EDI uses electricity for continuous regeneration — eliminating all chemical use, producing zero regeneration waste, and operating 24/7 without interruption.
Which industries use EDI systems?
EDI systems are used in pharmaceutical manufacturing, power plants (boiler feed water), semiconductor and electronics manufacturing, laboratories, food and beverage processing, and any application requiring consistently high-purity water above 1 MΩ·cm resistivity.
What feed water quality does EDI require?
EDI requires pre-treated RO permeate as feed water. Typical feed requirements: TDS below 50 mg/L, hardness below 1 mg/L as CaCO₃, free chlorine below 0.05 mg/L, CO₂ below 5 mg/L, and temperature between 5°C–35°C.
What is the cost of an EDI system in India?
EDI system costs in India range from ₹5 Lakh for small laboratory/pharmaceutical units to ₹3 Crore or more for large power plant or semiconductor fab installations.
Does EDI require any maintenance?
EDI modules have no moving parts and require minimal maintenance. Periodic tasks include monitoring feed water quality, checking electrode voltage and current, CIP cleaning if organic fouling occurs, and annual module performance testing.
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