Remineralisation

Why should desalinated water be remineralized?

Low mineralized water have few adverse effects:

- High corrosion potential
- Dietary deficiency causing risks of ischaemic heart and cerebrovascular disease (WHO, 2005a; WHO, 2006; Cotruvo, 2006)

The WHO recommends 10 mg/L of Magnesium and 30 mg/L of Calcium for drinking water.

Two solutions are widely used to remineralize/neutralize water:

Description	Minerals
CO₂ addition + Calcite Limestone (CaCO₃, MgO) percolation + Na₂CO₃	80 mg/L CaCO₃ pH 7-7.5
Addition of CaCl₂ + NaHCO₃	100 mg/L CaCO₃ 100 mg/L Na + 50 mg/L Cl pH 7-7.5

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