Lime is a harmless product in water purification techniques, it is easy to handle and is used as a base to correct an excessively acidic pH:
- As a coagulation, flocculation, neutralization and decantation agent for suspended matter facilitating liquid/solid separation.
- To precipitate toxic elements (heavy metals: lead, chromium, copper, manganese, nickel, arsenic, cadmium, zinc, aluminum, iron, etc…) that are dissolved and precipitate in the form of hydroxide, and harmful (nitrates and phosphates in the form of insoluble salts).
- To disinfect by eliminating bacteria or viruses, as well as the radical suppression of bad odors.
In drinking water, lime rebalances the proportion of calcium in the water. Lime remineralizes water that is too soft or decarbonates water that is too hard (which leaves calcareous deposits).