About Us
The foundation of Ganga DM Waters is built on years of experience in setting up and supporting various water treatment plants in Kerala. We offer best products and support in terms of quality as our Team is comprised of highly skilled technicians enabled by latest technology.
At Ganga DM Waters we are proud to offer you 100% pure and natural, Highgrade, Ultra Filtered Demineralised water and we aim to be the most consumer-friendly organisation in the world.
We guarantee a quality of -
- EC- ≦ 1 micromho/cm2
- PH 5.5 - 7
- Zero TDS
Concepts
Demineralization
Demineralization is the process of removing mineral salts from water by using the ion exchange process. It is a physical process which uses specially-manufactured ion exchange resins which provides ion exchange site for the replacement of the mineral salts in water with water forming H+ and OH- ions. Because the majority of water impurities are dissolved salts, deionization produces a high purity water that is generally similar to distilled water. Demineralization technology is the proven process for treatment of water, operating on the principles of ion exchange, degasification, and polishing.
Demineralization Systems find wide application in the field of steam, power, process and cooling.
Demineralised Water
Demineralised water also known as Deionised water is water completely (or almost) free of dissolved minerals or its mineral ion contents removed. Mineral ions such as cations of sodium, calcium, iron, copper, etc and anions such as chloride, sulphate, nitrate, etc are common ions present in water.
Process
Raw Water is passed via two small polystyrene bead filled (ion exchange resins) beds. While the cations get exchanged with hydrogen ions in first bed, the anions are exchanged with hydroxyl ions, in the second one.
In the context of water purification, ion-exchange is a rapid and reversible process in which impurity ions present in the water are replaced by ions released by an ion-exchange resin. The impure ions are taken up by the resin, which must be periodically regenerated to restore it to the original ionic form. (An ion is an atom or group of atoms with an electric charge. Positively-charged ions are called cations and are usually metals; negatively-charged ions are called anions and are usually non-metals). The following ions are widely found in raw water -
Cations
- Calcium (Ca2+)
- Magnesium (Mg2+)
- Sodium (Na+)
- Potassium (K+)
Anions
- Chloride ( Cl-)
- Bicarbonate (HCO3-)
- Nitrate (NO3-)
- Carbonate (CO32-)
Deionisation
For many laboratory and industrial applications, high-purity Water which is essentially free from ionic contaminants is required. Water of this quality can be produced by deionization.The two most common types of deionization are -
- Two-beddeionisation
- Mixed-bed deionisation
Two-bed Deionisation
The two-bed deioniser consists of two vessels - one containing a cation-exchange resin in the hydrogen (H+) form and the other containing an anion resin in the hydroxyl (OH-) form. Water flows through the cation column, whereupon all the cations are exchanged for hydrogen ions. To keep the Water electrically balanced, for every monovalent cation, e.g. Na+, one hydrogen ion is exchanged and for every divalent cation, e.g. Ca2+, or Mg2+, two hydrogen ions are exchanged. The same principle applies when considering anion-exchange. The decationised water then flows through the anion column. This time, all the negatively charged ions are exchanged for hydroxide ions which then combine with the hydrogen ions to form water (H2O).
Mixed-bed Deionisation
In mixed-bed deionisers the cation exchange and anion exchange resins are intimately mixed and contained in a single pressure vessel. The thorough mixture of cation exchangers and anion exchangers in a single column makes a mixed-bed deioniser equivalent to a lengthy series of two-bed plants. As a result, the water quality obtained from a mixed-bed deioniser is much higher than that produced by a two-bed plant. Although more efficient in purifying the incoming feed water, mixed-bed plants are more sensitive to impurities in the water supply and involve a more complicated regeneration process. Mixed-bed deionisers are normally used to polish the water to higher levels of purity after it has been initially treated by either a two-bed deioniser or a reverse osmosis unit.