English to Italian Marketing Environment & Ecology

Generation of treated wastewater is cheaper and consumes lower energy when compared to desalinated water.
Sourcing water and treating it can be an important source of other chemicals as well.
In certain water desalinization processes (when thermal evaporators are leveraged), CO2 is recovered during the evaporation and reused in a later stage during potabilization and remineralization (in form of carbonic acid, to melt Calcium Carbonate).

Mia libera interpretazione:
Viene recuperata CO2 sotto forma di acido carbonico "nel carbonato di calcio disciolto"???).