EDI Module
As an economical and practical environmentally friendly ultrapure water treatment solution, continuous electrodeionization technology applies continuous electrodeionization technology, which does not require chemical regeneration and no acid and alkali discharge, and can fully meet the requirements of energy conservation and environmental protection. The membrane stack can work continuously for a long time, with low energy consumption and high water utilization rate.
Product Features
Our advanced membrane technology delivers superior water purification with reliable performance and minimal maintenance.
Superior Sealing Technology
Double O-rings are used for sealing to ensure that the membrane stack does not leak during operation, providing reliable and consistent performance.
Exceptional Water Quality
The water quality of the produced water is better than that of the mixed bed, and no chemical regeneration is required, ensuring pure results every time.
Continuous Operation
Water is produced continuously with stable quality without fluctuation, eliminating the need for acid or alkali neutralization systems or resin tanks.
Electrical Insulation
Our system features excellent electrical insulation performance, ensuring safety and reliability in all operating conditions.
High Performance Capacity
Can operate continuously at 7 bar (100 psi) and 45°C (113°F), making it suitable for demanding industrial applications.
Maintenance-Free Design
No chemical regeneration required, significantly reducing maintenance costs and environmental impact compared to traditional systems.
Working Principle of EDI
The working principle of EDI (Electrodeionization) is to drive the ions on the surface of the ion exchange resin to migrate rapidly through the direct current (DC) electric field loaded by the anode (+) and cathode (-) of the EDI membrane block.
The anions/cations in the fresh water chamber selectively pass through the anion/cation exchange membrane and enter the concentrated water chamber.
In a specific area of the fresh water chamber, a large amount of H+ and OH- are generated by the splitting of water. Under the action of the DC electric field, H+ and OH- replace the inorganic salt ions bound to the failed resin to complete the regeneration, achieving continuous and efficient operation.
EDI Membrane Block Schematic
Diagram showing the ion migration process through the EDI membrane with anode (+) and cathode (-) electric field.
Feed Water Specifications
| Feed Water Source | 2RO permeate |
| Feed Water Conductivity | ≤ 10µS/cm |
| Silica (SiO2) | <1 ppm |
| Iron (as Fe, Mn, S) | <0.01 ppm |
| Total Chlorine (as Cl2) | <0.02 ppm |
| Total Hardness (as CaCO3) | <1.0 ppm |
| Dissolved Organics (TOC as C) | <0.5 ppm |
| PH | 4-11 |
| Temperature | 5- 45°C |
| Inlet Pressure | <100 psi（7 bar） |
Operating Parameters
| Recovery | 90–95% |
| Pressure Drop Range at Nominal Flow | 20 - 36 psi（1.4 - 2.5 bar） |
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| Production Water Resistivity |
Minimum flow rate ＞17MΩ.cm Nominal Flow ＞15MΩ.cm Maximum flow ＞7MΩ.cm |
| Silica (SiO2) Removal | 90–99% (depending on feed conditions) |
Specifications may vary based on system configuration and operating conditions. Please consult with our technical team for detailed information.
Product Specifications
Our DS Series EDI module offer industry-leading performance with various flow capacities to meet your specific requirements.
| Module Number | Nominal Flow (m³/h) | Flow Range (m³/h) | DC Voltage (V) | DC Current (A) | Transport Weight (KG) |
|---|---|---|---|---|---|
| DS05-S | 0.44 | 0.22-0.67 | 0-55 | 0-5 | 55 |
| DS10-S | 1 | 0.55-1.65 | 0-135 | 0-5 | 71 |
| DS20-S | 2 | 1.0-3.1 | 0-240 | 0-5 | 94 |
| DS30-S | 3.3 | 1.7-5.1 | 0-320 | 0-5 | 124 |
| DS50-S | 5 | 2.55-7.7 | 0-400 | 0-5 | 170 |
Technical Support
Need help selecting the right model for your application? Our technical team is available to assist you with detailed specifications and customized solutions.
Download Resources
Access detailed product datasheets, installation guides, and performance curves for our DS Series solar water pumps.
Download PDF* Specifications may vary slightly based on installation conditions and environmental factors. Please consult with our technical team for the most accurate information for your specific application.
Application Cases
Our water treatment solutions have been successfully implemented across various industries.
Energy and Chemical Industry Solution
2250 m³/H
≥16 MΩ·cm
100V/2.0A
Ningxia, China
Thermal Power Plant Solution
1800 m³/H
≥16 MΩ·cm
120V/2.0A
Lianyungang, China
Contact Shanghai CM
We'd love to hear from you. Please fill out the form or contact us directly using the information below.
Chris Li
+86 18221094035
chris@shchenmo.com
Building 9, No. 1188 Jiangyue Road, Minhang District, Shanghai
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Our Growth Journey
2009
Started manufacturing ultrafiltration membranes in Qingpu District, Shanghai.
2013
Added MBR production line and received CE and ISO 9001:2015 certifications.
2019
Established Shanghai CM Environmental Technology Co., Ltd. for overseas markets.
2023-2025
Expanded to 60+ countries with over 1,000 global customers and partners.
