Demineralized Water Plant (DM Plant)
Aquatic Solutions
Demineralized Water Plant (DM Plant)
Ion exchange demineralization plants producing ultra-pure, mineral-free water for boiler feed, pharmaceutical manufacturing, electronics, and laboratory applications.
Overview
A Demineralized Water Plant (DM Plant) uses ion exchange resins to remove virtually all dissolved mineral salts from water — producing demineralised (DM) water with conductivity below 1 µS/cm and TDS near zero. DM water is essential for high-pressure boilers (to prevent scale and corrosion), pharmaceutical manufacturing (as purified water or WFI pre-treatment), electronics manufacturing, and laboratory applications.
Aquatic Solutions manufactures two-bed (2B) and mixed-bed (MB) DM plants in FRP and MS construction. Two-bed systems use separate cation and anion exchange columns, while mixed-bed systems combine both resins in a single vessel for ultra-pure water (conductivity < 0.1 µS/cm). We also supply electrodeionisation (EDI) systems as a chemical-free alternative to mixed-bed polishing. Regeneration chemicals (HCl and NaOH) are supplied along with the plant.
Key Features
- Two-bed (2B) and mixed-bed (MB) configurations
- Strong acid cation (SAC) and strong base anion (SBA) resins
- Conductivity < 1 µS/cm (2B) / < 0.1 µS/cm (MB)
- FRP and MS epoxy-coated vessel construction
- Capacities from 500 LPH to 50,000 LPH
- Electrodeionisation (EDI) option for chemical-free regeneration
- Online conductivity monitoring with alarm
- Acid and alkali regeneration systems
Get a Free Quote
We respond within 1 business day.
Technical Specifications
| Parameter | Specification |
|---|---|
| Configuration | Two-bed (SAC + SBA) / Mixed-bed (SAC + SBA combined) |
| Inlet TDS | Up to 500 ppm (after RO pre-treatment recommended for > 500 ppm) |
| Outlet Conductivity | < 1 µS/cm (2B) / < 0.1 µS/cm (MB) |
| Outlet TDS | < 0.5 ppm (2B) / < 0.05 ppm (MB) |
| Silica Removal | > 99% (SBA resin) |
| Regenerants | HCl (cation) + NaOH (anion) |
| Vessel Material | FRP / MS epoxy-coated / SS 316L (for MB) |
| Capacity Range | 500 LPH – 50,000 LPH |
How It Works
Cation Exchange
Pre-treated water flows through the strong acid cation (SAC) resin column. All cations (Ca²⁺, Mg²⁺, Na⁺, K⁺, Fe²⁺) are exchanged for hydrogen ions (H⁺), producing acidic water with all cations replaced by H⁺.
Anion Exchange
Cation-exchanged water flows through the strong base anion (SBA) resin column. All anions (Cl⁻, SO₄²⁻, HCO₃⁻, NO₃⁻, SiO₃²⁻) are exchanged for hydroxyl ions (OH⁻). H⁺ and OH⁻ combine to form water (H₂O), producing demineralised water.
Mixed-Bed Polishing
For ultra-pure water, the two-bed effluent passes through a mixed-bed column containing intimately mixed SAC and SBA resins. This provides a final polishing step, achieving conductivity below 0.1 µS/cm.
Quality Monitoring
Online conductivity meters continuously monitor the DM water quality. When conductivity rises above the set point (indicating resin exhaustion), the system triggers a regeneration alarm or automatically initiates regeneration.
Cation Regeneration
Exhausted cation resin is regenerated with dilute hydrochloric acid (HCl, 4–6%), which displaces Ca²⁺, Mg²⁺, and other cations from the resin and restores H⁺ form.
Anion Regeneration
Exhausted anion resin is regenerated with dilute sodium hydroxide (NaOH, 4–6%), which displaces Cl⁻, SO₄²⁻, and SiO₃²⁻ from the resin and restores OH⁻ form. Regeneration effluent is neutralised before discharge.
Capacity Options & Indicative Pricing
Prices are indicative and vary based on raw water quality, automation level, and site conditions. Contact us for an exact quotation.
| Capacity | Typical Application | Indicative Price (INR) |
|---|---|---|
| 500 – 5,000 LPH | Small boiler, pharma lab, electronics | ₹1.5 – 8 Lakhs |
| 5,000 – 25,000 LPH | Medium industry, power plant | ₹8 – 30 Lakhs |
| 25,000 – 50,000 LPH | Large power plant, pharma | ₹30 – 80 Lakhs |
* Prices are ex-works, exclusive of GST, civil work, and installation. Final price depends on site-specific requirements.
Industries & Applications
Why Choose Aquatic Solutions?
Service Coverage Across India
Aquatic Solutions manufactures DM water plants across India — Mumbai, Pune, Nashik, Hyderabad, Bangalore, Chennai, Ahmedabad, Surat, Delhi NCR, Kolkata, and all major industrial cities. We supply regeneration chemicals (HCl and NaOH) and offer resin replacement services across Maharashtra, Gujarat, Karnataka, Tamil Nadu, and Telangana.
Frequently Asked Questions
Ready to get started?
Get a free consultation, site assessment, and detailed quotation from our engineers.