TREATING WATER WITH SALT
• Water softeners contains resins which look like small beads. They hold back the scale in the water by exchanging the calcium (Ca 2+) and magnesium (Mg 2+ ) ions from hard water for the sodium ions (Na +) that they contain.
• Hard water passes through the resins and emerges softened from the appliance.
• Depending on the water consumption, the resins gradually become saturated with calcium ions and lose their effectiveness. The resin must then be regenerated with the brine produced from the softener salt pellets. During this operation, known as regeneration, the calcium and magnesium ions attached to the resins are exchanged for sodium ions. The resin is cleaned and ready to soften water again.
• Electrochlorination is based on the generation of chlorine by electrolysis of a saline solution by means of a small electric current.
• The salt electrolysis process produces sodium hypochlorite (NaOCl, or bleach) which is used to:
> Disinfect the pool> Give disinfectant properties to water (persistence) > Ensure that equipment remains efficient> Ensure optimum bathing comfort
• After destroying the bacteria and micro-organisms in the water, the active chlorine converts naturally back into salt under the effect of ultraviolet rays. It is preferable to use refined salt compacted into pellets which gradually dissolve homogeneously in water.