Continuous Electro De-ionization
Electrodeionization (EDI) is an advanced, complex and environmentally friendly water purification technology that produces high-purity water by combining traditional ion exchange resins with electrically active membranes and a direct electrical current. Unlike conventional deionization systems that require regular regeneration using hazardous chemicals such as acids and alkalis, EDI continuously removes dissolved ions without the need for chemical regeneration, making it a sustainable and cost-effective solution. While conventional water treatment systems typically use Reverse Osmosis (RO) followed by Ion Exchange to achieve high water purity, EDI serves as a modern alternative for Ion Exchange that further enhances water quality while reducing chemical consumption, operating costs, and environmental impact. As a result, EDI is considered a viable alternative technology downstream of RO systems for industries requiring consistently purified water, including pharmaceutical, power generation, electronics, food and beverage, and other critical process applications.
NWTSPL has developed customized water purification solutions, including integrated RO-EDI systems and standalone EDI plants, designed to consistently deliver ultrapure water for critical industrial applications. Leveraging extensive industry expertise and advanced engineering capabilities, our solutions ensure high operational efficiency, reduced chemical consumption, and reliable water quality that meets the most stringent process requirements. Explore our project case studies to learn how NWTSPL has successfully supported clients across a wide range of industries with innovative and sustainable water treatment solutions. For more information or to discuss your specific water purification needs, please feel free to contact our team.
Design Water Quality
Feed water limiting Conditions for EDI
| Parameters | Limit |
|---|---|
| 1. Conductivity | < 20 µS/cm |
| 2. Temperature | 5°C - 45°C |
| 3. Inlet Pressure | 2.5 bar |
| 4. Max Free Chlorine | NIL |
| 5. Iron | < 0.01 ppm |
| 6. Manganese | < 0.01 ppm |
| 7. Sulfide | < 0.01 ppm |
| 8. pH | 4 – 10 |
| 9. Total Hardness | Nil |
| 10. Total Organics | < 0.5 ppm |
| 11. Silica | Nil |
Our System Contains:
- EDI Feed Pump
- Continuous Electro De-ionization Unit (CEDI)
- Pressure Gauges
- Rotameter
- Turbine Type Flow meter
- Vortex Type Flow Meter
- Low Pressure Switch
- Conductivity meter with sensor
- Flow diverter valve
- Sampling valve
- Isolation Valve
- ORP Meter with sensor
- PLC Control Panel with HMI touch Screen
- DC Transformer rectifier
- Interconnecting piping, nut bolts and Gasket
Advantages of EDI
- Compact and Modular Design
- Low Operating Cost
- No regeneration and hence no / minimum chemical consumption
- Easy to operate and maintain, requires practically no maintenance
- Very high reliability and consistency with respect to conductivity