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Dual Media Filter (DMF):

Dual Media Filter primarily used to filter out Turbidity in the raw water up to level of 50 NTU. It consists of Sand and Anthracite as Filtering Medium,Anthracite having higher dirt holding capacity is used for removing turbidity.

Activated Carbon Filters (ACF):

Activated carbon Filters consists of charcoal which is used as a media for removal of Free Residual Chlorine, Colour, Odour and Oil in small quantity. Pressure Sand Filter (PSF):
Fine mesh sand along with gravel of different sizes are used as the filtering Media. It is used to filter out turbidity from Raw Water up to level of 25 NTU Iron Removal Filter (IRF):
Iron Removal Filter consists of Manganese Dioxide layer which works as a catalyst For converting Iron present in water as Ferrous to Ferric ion which can be easily precipitated & filtered physically. Iron removal Filter is used for removing Dissolved Iron from water. Application:-Industries Tea Gardens Hospitals and Hotels Housing Complexes;
Advantages:-Safe potable waters Minimum Maintenance Cost Reduction of Corrosion in Pipe Lines Easy Handling


Softener is used for removing Hardness salts (e.g.Ca, Mg. salts of Carbonate, Sulphate & Hydroxides) from water. It consists of Ion-Exchange Resin in Sodium form. When hard water passes through Softener bed, Sodium ions of Resin are exchanged with Ca and Mg ions and generate Soft water. Once the resin beds are saturated with Ca & Mg, the unit requires regeneration with brine salt.


It is used for reducing alkalinity of the water. Weak Acid Cation Exchange Resin can remove all Cations which are associated with alkalinity. The Alkalinity gets converted to Carbonic acid which splitsa in the CO2 and water. The CO2 is removed by the de-gassifier.This is followed when the Alkalinity of water is higher than Hardness. WAC + De-gasser system is used when the entire hardness is bicarbonate Hardness i.e. Temporary Hardness. But when the Alkalinity is lower than Hardness, then the Hardness excess of Alkalinity shall be non-Carbonate Hardness i.e. Permanent Hardness. This Hardness can not be removed by WAC resin, in that case split stream and de-gasser system is recommended. One stream is passed through Softener where as the second stream is passed through SAC. Both streams are mixed and passed through the de-gasser.


Demineralisation with mixed bed column is more commonly used method for removing both cations and anions bypassed from D.M. units. This unit is capable of producing water of extremely high purity to suit various requirements in the Industries. In this technique a mixture of special M.B. grade cation exchange resins in H+ form and anion exchange resin in OH- form are packed in a single vessel. as it removes even the traces of cations and anions that are bypassed from SAC and SBA,it is also called the Polishing unit. It gives ultra pure DM water.


It is the modern process technology by which water of high solute concentration is forced to flow through a semi-permeable membrane to the side of low solute concentration. This process rejects (removes) almost 95-99% of dissolved salts, almost all organic matters, colloidal matters of feed water and gives very good quality water. It involves application of pressure greater than osmotic pressure of solution. Diffusion of water but not salt through a semi permeable membrane in direction opposite of natural flow. Cross flow filtration to sweep away concentrated salts.
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