Water Solution – One Call Ahead
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Softening is the process of removing Calcium and Magnesium ions from water through Cation exchange. This is typically used to reduce scaling tendency of water used for boiler feed, or to increase the lather effect of detergents, particularly in laundries & process, Calcium and Magnesium ions in solution are exchanged for sodium ions attached to a cationic resin. When water is passed through this resin, the calcium and magnesium ions in the water displace the Sodium Ions, and adsorb onto the resin. During the regeneration process, a highly concentrated saline solution (15-30% NaCl) is used to “wash” the resin. This causes the Ca or Mg which is adsorbed on the resin to be replaced with Na.
Sizing of Softener is based on three factors; the capacity of the softener (flow rate), feed water hardness, and frequency of regeneration required.
Scale buildup of just 1.6mm can reduce heat transfer efficiency by up to 12%, leading to massive energy waste. Optima Water’s softening solutions ensure:
Precision Brine Systems: Optimized salt-to-water ratios in our brine tanks to ensure efficient regeneration with minimal salt wastage.


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A Water Softener Plant removes hardness-causing calcium and magnesium ions from water through cation exchange. Hard water passes through a bed of cation exchange resin where calcium and magnesium ions are replaced with sodium ions. The resin is periodically regenerated using a concentrated salt (NaCl) solution.
Hard water causes scale buildup in boilers, heat exchangers, pipes, and cooling towers. Scale buildup of just 1.6mm can reduce heat transfer efficiency by up to 12%, significantly increasing energy consumption and causing premature equipment failure.
A Water Softener selectively removes calcium and magnesium (hardness) while retaining all other dissolved solids. RO removes all dissolved solids. For applications where only hardness removal is needed (boiler feed, laundries, cooling), a softener is the most cost-effective choice.
Regeneration frequency depends on feed water hardness and the softener capacity (resin volume). Typical small softeners in Delhi NCR may need regeneration every 24–72 hours. Modern automatic softeners regenerate on demand based on volume processed.
Domestic water softeners can make water softer for household use, but the elevated sodium content may not be ideal for drinking, particularly for people on low-sodium diets. A dedicated RO point-of-use system is recommended for drinking water.
Salt consumption depends on system capacity, feed water hardness, and regeneration efficiency. Optima Water Precision Brine Systems optimize salt-to-water ratios to ensure efficient regeneration with minimal salt wastage.
Free site visit and assessment by our engineers. 158+ projects delivered across India.