Electrodeionization System Supplier and Manufacturer in China

The NEWater electrodeionization system is a green solution that improves system performance while reducing maintenance costs and power consumption.

  • Fully automated control.
  • Environmentally friendly.
  • Continuous production is possible.
  • Produced water is pure.
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What is Electrodeionization (EDI)?

Electrodeionization (EDI), also known as Continuous Deionization (CDI) technology, is a process that combines semi-membrane technology with ion exchange media. This technology allows the advantages of electrodialysis and ion exchange to be effectively combined to provide an efficient desalination process.

Used to remove ions from water through electroactive media, the process requires no chemicals and the system has the ability to regenerate itself automatically. The produced water is characterized by high purity and stable water quality.

Related Products of Electrodeionization Equipments

Deionization Systems

NEWater produces deionization systems that effectively remove organic substances from water, improve water quality, and prevent the formation of scale deposits.

Water Softener Systems

Water softening technology removes the high concentrations of calcium and magnesium that cause hard water. The problem of limescale is solved and the taste of drinking water is preserved.

Ion exchange systems

Our ion exchange system solves the problems of hardness, scale buildup, nitrates, arsenic, etc. present in raw water for you. The system is equipped with regeneration capability.

RO Water System

We use advanced reverse osmosis (RO) technology with high quality reverse osmosis membranes to provide you with clean and safe filtered water.

Seawater Desalination System

Our desalination systems solve the problem of inconvenient access to water in islands and coastal areas and provide clean and fresh drinking water.

Electrodeionization (EDI) Modules

NEWater can provide you with cost effective EDI modules and matching automation packages. Contact us today for a custom system!

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4 Main Advantages-NEWater

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Reliability & Quality
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No Chemical Contamination
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Energy Saving
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On-time Delivery

How does Electrodeionization System Work?

EDI technology uses a DC power supply to deionize water and separate dissolved ions from the water by means of electricity, ion exchange membranes, and resins. The DC voltage causes the cations to move toward the cathode, while the anion exchange resin removes the negatively charged ions. The ions are transferred to the concentration chamber using cationic and anionic semi-permeable membranes and flushed out of the module through a continuous waste stream. Strong ions are removed from the process stream and thus the conductivity becomes very low.

Unlike other water purification technologies, it does not use chemical treatment. There are also EDI units commonly referred to as continuous electrodeionization (CEDI), which treat water to very high purity with a conductivity below 0.1 μS/cm. Also, the current can continuously regenerate the resin block.

Electrodeionization System Work flow
Electrodeionization System Function

What does EDI Equipment Remove from Water?

Many industries require high-purity water, such as the pharmaceutical and electronics industries and laboratories. Electrodeionization removes salts and ionizable aqueous contaminants from raw water, including

  • Sodium
  • Calcium
  • Chlorine
  • Potassium
  • Ammonia
  • Boron
  • Silicon dioxide
  • Carbon dioxide
  • etc.

3 Basic Steps of EDI Process

– Electrodialysis: With the voltage continuously applied, positive and negative ions are guided to the electrodes with opposite loads. The permeable membranes for anions and cations are responsible for directing them to the concentration zone.

– Ion exchange: The power supply of the EDI continuously provides a DC current between the two electrodes. Positively charged ions pass through the cation resin bed and through the cation exchange membrane into the concentration chamber. Negatively charged ions pass through the anion resin bed, through the anion exchange membrane and into the concentration chamber. The salts in the water are eventually replaced by hydroxyl anions and hydrogen cations.

– Regeneration: As the ions are removed and migrate into the concentration chamber, the resin can achieve regeneration. An electric current can split a small fraction of the water molecules into hydrogen and hydroxide ions, causing the resin bed to regenerate continuously: H2O → H+ + OH-. (called hydrolysis).

3 Basic Steps of EDI Process

Why NEWater is the Ideal Choice for You?

EDI Water System Manufacturer

NEWater electrodeionization equipment can completely replace the traditional ion exchange process. It can completely remove dissolved inorganic particles, even better when combined with reverse osmosis pretreatment, removing more than 99.9% of the ions in the water. It requires few automatic valves or complex control sequences requiring operator supervision.

Our EDI systems require very little space and are designed to be automated, requiring few automatic valves or operator supervision, making operation and maintenance cost-effective. We can save energy and operating costs for your high-purity water treatment process.

All You Want to Know about NEWater EDI System

NEWater Electrodeionization System Features:
NEWater Electrodeionization System Features:
  1. NEWater Electrodeionization (EDI) features.
  2. Complete elimination of chemicals for regeneration.
  3. Non-polluting, safe and reliable.
  4. Compact design, space saving
  5. Low power consumption, minimal maintenance.
  6. Lower input costs.
  7. Produces high purity water at a constant flow rate.
NEWater Electrodeionization System Applications
NEWater Electrodeionization Equipment Applications:
  • Power plants
  • Chemical production
  • Biopharmaceuticals
  • Laboratory
  • Microchip rinse water
  • Pharmaceutical industry
  • Boiler feed water
  • Food and beverage industry residual water reuse

Our EDI System Case Studies:

Electrodeionization Systems for Biopharmaceuticals
Electrodeionization Systems for Biopharmaceuticals

Impure water with ions can damage or alter pharmaceuticals, which can be harmful to human health.

EDI Technology for the Laboratory
EDI Technology for the Laboratory

Unpredictable ion levels can cause variation, and treated water using EDI systems allows for accurate, controlled experiments.

EDI Technology for Power Generation and Cooling

Treated water from EDI systems can be used in boilers or turbine combustion chambers in power plants. Cooling towers require the use of water with ions removed to avoid corrosion or scaling.

Electrodeionization for Food Manufacturing
Electrodeionization for Food Manufacturing

Similar to the pharmaceutical industry, the food manufacturing industry requires purified water to prevent possible food safety issues.

Electrodeionization Equipments Supplier
NEWater: Your EDI System Solutions Experts

Reliability, high quality, and no chemical regeneration are the hallmarks of our electrodeionization systems. For 20 years, we have been providing cutting-edge solutions in water treatment for a wide range of countries and industries. Send an inquiry now!

NEWater's Diverse EDI System Designs

NEWater Provides the Best EDI Systems

Sustainability is our common goal. NEWater offers high-quality, cost-effective electrodeionization systems designed to produce reliable, high-quality product water for our customers that is clean, safe, and environmentally friendly without the need for chemicals.

It removes virtually all ions from water, and integrated controls and a fully optimized, integrated system ensure interruption-free operation of the equipment. NEWater’s EDI’s ion exchange beds are constantly regenerated and the concentrates remove impurities; they do not build up, accumulate or deplete the resin. Collected ions can be recycled or reused. Our EDI modules also offer excellent performance, ensuring consistent quality of produced water.

NEWater’s EDI systems are skid-mounted and factory-tested, offering the advantages of easy installation, simple operation, and quality assurance. Contact us for the best and most complete high-purity water treatment solutions.

What is the Difference Between Deionization (DI)and Electrodeionization(EDI)?

Deionization refers to the removal of cations and anions from water to obtain nearly pure water, mainly through the RO membrane and mixed bed resin to remove impurities in the ionic state of the water. A Deionization system can remove most of the ions in water, such as calcium, copper, iron, sodium ions, bromides, and chlorine. However, soluble organic matter is still present in the water after passing the deionization process.

EDI is a chemical-free form of deionization that uses direct current and can achieve very high purity of produced water by consuming electricity.EDI cannot be used for water with a hardness above 1 because calcium carbonate forms crusts that limit the system’s operation.

EDI technology is commonly used to polish reverse osmosis permeates, not only to make up for the shortcomings of the traditional process by simplifying the process steps but also to improve production efficiency, it can replace the traditional ionized mixed bed device. As the ideal choice for the deionization process in the pure water industry, electrodeionization equipment is more advantageous than conventional deionized water plants, both in terms of the performance of the equipment itself and in terms of investment.

figure1: DI(Deionization)VS EDI (Electrodeionization)

Can an Electrodeionization Equipment Remove Carbon Dioxide?

Carbon dioxide can pass freely through the RO membrane, breaking down and increasing the conductivity of the water. CO 2 in water is usually removed by adjusting the pH of the water before feeding it to the reverse osmosis membrane to remove the ionic material.

Electrodeionization Equipment Remove Carbon Dioxide

Any ionic material formed by CO 2 gas will lower the exit resistivity of the water produced by EDI modules. Unlike reverse osmosis systems, EDI water treatment is effective in removing CO2 concentrations from feed water. RO systems cannot remove CO2, so water treatment projects rely heavily on EDI water systems for this purpose.

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