Demineralization (DM) and Mixed Bed (MB) Systems

Bluemaarlin is a Manufacturer, Supplier, and Exporter of Industrial and Commercial Demineralization (DM) and Mixed Bed (MB) Systems in Pune, Maharashtra, India.

We provide design, manufacturing, installation, and service support for DM and MB plants across Pune, Mumbai, Nashik, Kolhapur, Sangli, Satara, Raigad, Hyderabad, Vijayawada, Sambhajinagar, Ahilyanagar, Gujarat, Karnataka, Goa, Rajasthan, Daman & Diu, and Dadra & Nagar Haveli.

About Demineralization (DM)

Demineralization is a water treatment process used to remove dissolved salts, minerals, and ions from water. The process works on the principle of ion exchange, where cation and anion resins remove positively and negatively charged ions present in water.

In DM systems, hydrogen form cation resin (H⁺ form) is used to exchange positive ions, while hydroxide form anion resin (OH⁻ form) removes negative ions from the water.

DM systems are generally used where very low conductivity water is required. With proper system design and polishing, conductivity levels of less than 1 µS/cm can be achieved.

Ion Exchange Reactions in Demineralization Process are

Cation Exchange Reaction (Hydrogen Form Resin)

The hydrogen form cation resin exchanges hydrogen ions (H⁺) with dissolved positive ions such as calcium and magnesium:

The hydrogen form cation resin exchanges hydrogen ions (H⁺) with dissolved positive ions such as calcium and magnesium:

Anion Exchange Reaction (Hydroxide Form Resin)

The hydrogen ions (H⁺) and hydroxide ions (OH⁻) released during the process combine to form pure water:

DM Plant Process

A typical DM system consists of the following stages :

• Cation Bed – removes positive ions such as calcium, magnesium, sodium, and potassium using hydrogen form resin
• Degasser Tower – removes carbon dioxide formed during the cation exchange process
• Anion Bed – removes negative ions such as chloride, sulphate, and nitrate using hydroxide form resin
• Polishing Unit – Mixed Bed (MB) used for final polishing of water
This process ensures that almost all dissolved ionic impurities are removed from the water.

Mixed Bed (MB)

A Mixed Bed system consists of a single vessel where both cation and anion exchange resins are mixed together. The cation resin used is in hydrogen form (H⁺ form) and the anion resin is in hydroxide form (OH⁻ form).

This arrangement provides very high ion exchange efficiency and is generally used as a polishing unit after the DM plant. Mixed Bed units help achieve very low conductivity levels, typically less than 1 µS/cm, making the water suitable for high purity applications.

Ion Exchange Reactions in Mixed Bed

Design Parameters

Bluemaarlin DM systems are designed considering feed water quality and process requirements.

• Maximum inlet TDS considered: up to 500 ppm
• Conductivity achievable after treatment: less than 1 µS/cm

Proper system design ensures efficient ion removal and stable long-term operation.

Flow Range of DM Systems

• 250 LPH
• 500 LPH
• 1000 LPH
• 2000 LPH
• 5000 LPH
• 10000 LPH
• Up to 50000 LPH

DM systems above 50000 LPH can also be provided based on customization and specific project requirements.

Ion Exchange Media

Bluemaarlin uses high-quality ion exchange resins for reliable performance. The media used in DM and MB systems are typically sourced from:

• Thermax
• Ion Exchange

Applications

• Cosmetic industry
• Food and beverage industry
• Chemical industry
• Agriculture industry
• Battery manufacturing companies
• Any application where water conductivity is required to be less than 1 µS/cm

Operation and Maintenance

Regeneration of ion exchange resins is required after a certain operating cycle to restore their ion removal capacity. Bluemaarlin provides proper SOPs for regeneration calculations and system operation to ensure efficient plant performance and easy maintenance.