Energy & Environment

The concentration of calcium and magnesium ions in water varies depending both on the source of the water – as a consequence of the type of rock that the water comes into contact with – and on the treatment that the water is subjected to, for example in order to reduce turbidity which may also entail a reduction in the quantity of dissolved salts. The concentration of calcium and magnesium ions determines a water’s degree of hardness: if the concentration of such salts is very low, then the correct level needs to be re-established in order to attain the legally-recommended minimum degree of hardness.

In this regard, SOL offers products, services and technology that have been widely tested in a number of different fields: the desired degree of hardness is obtained through the addition of an opportune quantity of certified food-grade salts and CO₂, with standard doses of CO₂ of a few ppm, depending on the initial degree of hardness and on other parameters involved in the process. SOL’s technology accurately controls these doses by regulating the quantity of CO₂ to be put into the water, on the basis of several parameters controlled by a cascade control system. Moreover, the plant-related operations required for the introduction of the CO₂ are simple and non-invasive.