What Is an EDI Water System?
Keywords:EDI Water System| Published: 2026-02-05 | Author: DIEN WATER GROUP
EDI Water System
Continuous Production of High Purity and Ultrapure Water
An EDI water system (Electrodeionization) is an advanced water purification solution that removes dissolved ions from water using electric current, ion exchange membranes, and resin.
EDI systems are widely used to produce high purity and ultrapure water without chemical regeneration.
What Is an EDI Water System?
An EDI water system combines ion exchange technology and membrane separation with electrical regeneration, allowing continuous deionized water production.
Unlike traditional mixed bed systems, EDI does not require acid or alkali regeneration, making it safer and more environmentally friendly.
How an EDI Water System Works
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RO-treated water enters the EDI module
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Dissolved ions are attracted by an electric field
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Ions pass through selective ion exchange membranes
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Concentrated ions are discharged
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High purity water is continuously produced
Key Advantages
✔ Continuous operation without chemical regeneration
✔ Stable and consistent water quality
✔ Low operating cost and minimal maintenance
✔ Environmentally friendly design
✔ Fully automatic operation
Typical Water Quality Performance
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Resistivity: 15–18.2 MΩ·cm
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Conductivity: ≤ 0.1 μS/cm
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Silica removal: Excellent
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Boron reduction: Enhanced with proper pretreatment
Applications
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Pharmaceutical water systems
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Laboratory ultrapure water
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Electronics and semiconductor manufacturing
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Power plant boiler feed water
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High-end industrial process water
EDI Water System vs Mixed Bed Deionization
| Item | EDI Water System | Mixed Bed System |
|---|---|---|
| Regeneration | Electric (continuous) | Chemical (batch) |
| Chemicals Required | No | Yes |
| Operation Mode | Continuous | Intermittent |
| Maintenance | Low | High |
| Environmental Impact | Low | High |
Typical System Configuration
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Pretreatment: Sand filter, carbon filter, softener
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RO system: Single-pass or double-pass RO
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EDI module
Customization Options
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EDI module brands and capacities
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Single or double RO + EDI configuration
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SS304 / SS316L piping and frames
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PLC automatic control systems
Why Choose Our EDI Water Systems?
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Over 10 years of water treatment experience
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In-house system design and manufacturing
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Reliable EDI modules and components
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Customized solutions based on water analysis
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OEM & ODM services available
Turnkey EDI Water Solutions
We provide complete services including:
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System design
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Equipment manufacturing
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Installation guidance
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Commissioning and validation support
Get a Customized EDI Water System
Need an EDI water system for your project?
Our engineering team is ready to help you design the most efficient solution.
👉 Contact us today for consultation and pricing.
