- Qingqingquan
- Shandong
- 20 days
- 300 units per month
EDI systems produce 18 MΩ·cm ultra-pure water 24/7 with zero chemicals. 90% lower operating costs than ion exchange. Download free comparison guide.
EDI Water Purification Systems: The 2025 Ultimate Guide
What is EDI Technology?
• Hybrid innovation: Combines electrodialysis + ion exchange
• Zero chemicals: No acid/alkali regeneration needed
• Water purity: Produces 15-18 MΩ·cm ultra-pure water continuously
• Ideal feed water: RO permeate (1-20mg/L TDS)
Industry Shift: 78% of new semiconductor fabs now use EDI vs traditional DI (SEMI 2023 report)
How EDI Systems Work: 3-Stage Process
1. Ion Depletion Chambers
• Mixed-bed resin fills electrode compartments
• DC current splits water into H⁺/OH⁻ for resin regeneration
2. Selective Ion Migration
• Cations move toward cathode
• Anions move toward anode
• Rejection rate: 99.9% ions removed
3. Continuous Purification
✔ 24/7 operation
✔ Automatic pH balancing
✔ Real-time resistivity monitoring
EDI vs Ion Exchange: Key Benefits
| Parameter | EDI System | Traditional DI |
|---|---|---|
| Chemical Use | None | 100-300kg/month |
| Downtime | 0% | 15-20% |
| Water Recovery | 90-95% | 60-75% |
| OPEX Cost | $0.15/m³ | $1.20/m³ |
| Footprint | 50% smaller | Large regeneration area |
ROI Example: Pharma plant saved $480,000/year switching to EDI
Technical Specifications
| Model | Flow Rate | Output Quality | Power Use |
|---|---|---|---|
| EDI-500 | 500L/h | 15MΩ·cm | 150W |
| EDI-2000 | 2m³/h | 16MΩ·cm | 450W |
| EDI-10000 | 10m³/h | 18MΩ·cm | 2.2kW |
Materials: PP modules, 316L stainless steel headers
Industry Applications
1. Semiconductor Manufacturing
• 18 MΩ·cm for wafer cleaning
• Meets SEMI F63 standards
2. Pharmaceutical
• WFI (Water for Injection) prep
• USP <645> compliance
3. Power Generation
• Boiler feedwater treatment
• TOC <5ppb requirement
5 Reasons to Choose EDI
✅ Chemical-free operation
✅ Fully automated with PLC control
✅ 30% lower energy than older designs
✅ Validated to ISO 14644 Class 1
✅ 10-year membrane lifespan
Pro Tip: Pair with RO+UV for complete purification
Free Resources
📥 Download: "EDI System Sizing Calculator"
🔧 Get: Free Water Analysis Report
