The Chennai industrial belt — automobile plants and suppliers in Sriperumbudur, Oragadam and Maraimalai Nagar, electronics units, pharmaceutical and chemical manufacturers, and power and process industries — depends on high-purity water. Boilers, paint shops, electroplating lines, laboratories and battery plants all need demineralised (DM) water with very low conductivity. Intellect Aqua designs and builds DM and mixed bed plants in Chennai that deliver consistent purity at the lowest practical chemical cost.
How a DM Plant Works
A DM plant removes dissolved ions with ion-exchange resins. Cation resin exchanges calcium, magnesium and sodium for hydrogen ions; anion resin exchanges chloride, sulphate, bicarbonate and silica for hydroxide ions. The result is water with very low conductivity. When the resins are exhausted, they are regenerated with acid and caustic.
DM Plant Configurations
Two-Bed DM
Cation and anion vessels in series. Suitable where raw water TDS is moderate and purity requirements are standard.
Two-Bed with Degasser
Removes dissolved carbon dioxide between stages, reducing load on the anion resin and saving caustic.
Mixed Bed Polisher
Cation and anion resin in one vessel to achieve very high purity, often after a two-bed DM or RO.
RO + Mixed Bed
For Chennai's often high-TDS raw water, an industrial RO first removes most salts, and a mixed bed polishes the permeate. This cuts acid and caustic use dramatically and is frequently the most economical choice.
Why RO + DM Makes Sense in Chennai
Regeneration chemical use in a DM plant rises directly with the amount of salt in the feed water. Many Chennai borewells and tanker sources carry high TDS, which would make a conventional two-bed DM expensive to run and require frequent regeneration. Placing RO ahead of the DM reduces the ionic load reaching the resin, extends run lengths and saves chemicals, effluent volume and operator time.
| Raw water TDS | Purity need | Suggested system |
|---|---|---|
| Low | Moderate | Two-bed DM |
| Low–medium | High | Two-bed DM + mixed bed |
| High | Moderate | RO |
| High | High | RO + mixed bed |
Applications
- Automobile paint shops and pre-treatment lines: DM rinse water prevents spotting and improves paint adhesion.
- Boiler feed water: Medium and high-pressure boilers need low silica and conductivity.
- Electroplating and surface finishing: DM rinses improve finish quality.
- Electronics and precision cleaning: High-purity water for washing components.
- Pharmaceuticals and laboratories: Purified water for formulation and testing.
- Battery manufacturing: Pure water for electrolyte preparation.
Our Design Focus
- Resin volumes sized for practical regeneration intervals
- Rubber-lined MS or FRP vessels with corrosion-resistant internals
- Safe acid and caustic storage, dosing and handling with bunds
- Online conductivity and silica monitoring with alarms
- Automatic or semi-automatic regeneration
- Neutralisation pit for regeneration effluent before it joins your ETP
Signs Your DM Plant Needs Attention
- Conductivity rising before the end of the run
- Shorter runs between regenerations
- Silica slipping into boiler water
- Rising acid and caustic consumption
- Resin beads appearing downstream
These usually point to fouled or worn resin, regeneration problems or instrument errors. We test the resin, review regeneration practice and fix the cause.
Safety in DM Plant Operation
DM plants store and use concentrated hydrochloric or sulphuric acid and caustic soda. We design safe storage tanks with bunds, corrosion-resistant dosing equipment, proper ventilation, eyewash stations and clear signage. During commissioning, operators are trained on safe chemical handling, personal protective equipment and emergency procedures. Safety is built into the design, not added later.
Choosing Between Manual and Automatic Regeneration
Small DM plants can be regenerated manually by a trained operator following a step-by-step procedure. For larger plants and critical applications such as boiler feed in continuous plants, automatic or semi-automatic regeneration with PLC control and pneumatic valves reduces human error, saves time and makes chemical use more consistent. We recommend the level of automation based on plant size, operator availability and how critical the water supply is to your production.
Maintenance and AMC
Our AMC in Chennai covers regeneration checks, resin analysis and replacement, instrument calibration, valve servicing and chemical supply.
Areas We Serve
We supply DM plants to industries across the Chennai region — Sriperumbudur, Oragadam, Irungattukottai, Maraimalai Nagar, Mahindra World City, Ambattur, Guindy, Thirumazhisai, Manali, Gummidipoondi and Chengalpattu.
We also build DM plants in Coimbatore and water treatment plants in Hosur, Ranipet and Trichy.
Request a DM Plant Proposal
Share your raw water analysis, daily requirement and purity target. We will recommend the most economical DM, RO or RO+mixed bed configuration.