Harness the Power of CDI Technology
A Smart, Sustainable Solution for Water Purification
Capacitive Deionization (CDI) is a cutting-edge water purification technology designed to efficiently remove dissolved salts, ions, and other charged particles from water. Unlike conventional methods that rely on high-pressure membranes or extensive chemical use, CDI leverages electrostatic forces within a simple yet powerful electrical system—making it an eco-friendly, low-energy alternative for desalination and deionization.
The Science Behind CDI Technology
Capacitive Deionization
At the heart of CDI is a pair of high-surface-area, porous carbon electrodes — each with excellent electrical conductivity and ion adsorption capacity. These electrodes are separated by a water-permeable spacer that allows raw water to pass between them.
When a low direct current voltage (typically between 0.8 to 2.0 volts) is applied across the electrodes, they become electrically charged. This creates an electric double layer at the electrode surfaces, which attracts and captures oppositely charged ions from the water. For example, positively charged sodium (Na⁺) ions are attracted to the negatively charged electrode, while negatively charged chloride (Cl⁻) ions move toward the positively charged electrode. As ions are removed from the water stream, the output is purified, low-salinity water.
Once the electrodes are saturated with ions, they are regenerated by reversing the polarity of the applied voltage. This discharges the adsorbed ions, producing a concentrated waste stream that is safely flushed out. The system then resumes normal operation, making CDI a cyclic, continuously operable process with a high recovery rate and low waste generation.
Diverse Industrial Applications
CDI’s modular and scalable design makes it uniquely adaptable to a wide range of applications. CDI aligns perfectly with global goals for sustainable water management. As water scarcity intensifies and the demand for resilient, decentralized water treatment grows, CDI is emerging as a next-generation solution—combining material science, smart engineering, and digital control to redefine the way we access clean water.
Groundwater
Ensure safe, high-quality water for food and beverage production with our CDI systems.
Brackish Water
Removing dissolved salts and impurities to deliver high-purity water for manufacturing processes.
Saline Water
Our CDI purifiers efficiently desalinate and purify water from mining runoff or saline sources
Industrial Wastewater
Transform wastewater into reusable water with our advanced CDI technology
Key Benefits of CDI
Water recovery
70-85%
No disposal of polymeric substances
Long life of CDI cells
5 Years
Treated water pH is neutral
High TDS handling
2000 ppm
Nanotechnology enabled design
Less O&M Cost
2 paisa/L
Internrt of Things (IoT) integration
Modular & Compact
CDI units
Solar integration for external power
Technology Comparison
Explore how Capacitive Deionization (CDI) stands apart from conventional purification technologies like reverse osmosis, distillation, and ion exchange. Our comparison highlights key differences in energy efficiency, water recovery, maintenance, and environmental impact —helping you understand why CDI is the smarter, more sustainable choice for modern water treatment.
(RO – Reverse Osmosis; TD – Thermal Distillation; IX – Ion Exchange)
Parameter | RO | TD | IX | CDI |
|---|---|---|---|---|
Automation | Not Available | Available | Available | Available |
TDS removal at high temperature | Not Available | Not Available | Not Available | Available |
TDS reduction | > 97% | Tunable | Only hardness | Tunable |
Energy requirement | High | High | Low | Low |
System size | Medium | Large | Medium | Compact |
RMS (Remote monitoring system) | Not Available | Available | Not Available | Available |
Fouling | High | Very high | Low | Low |
Chlorine tolerance | Not Available | Available | Available | Available |
Use of Chemicals | High | High | High | Low |
Process | Mechanical | Elec./mech. | Chemical | Electrical |
Consumables | High | Medium | Low | Low |
Maintenance | High | High | Medium | Low |
Research & Development
Our innovation begins at the material level
Developing low-cost, sustainable solutions for next-generation water purification. Backed by the world-class research infrastructure at IIT Tirupati, our R&D team focuses on creating efficient, eco-friendly materials and technologies that drive our products.
From lab-scale breakthroughs to scalable industrial applications, we are committed to pushing the boundaries of water treatment science for a cleaner, more sustainable future.