Sulphate and chloride removal

Industrial waste waters usually contain substantial amounts of pollutants such as chloride, sulphate, or even nitrate, which, due to their specific nature, are difficult to purify.
These ions, once dissolved, increase the water salinity, thus making it not apt for disposal.
These ions come from decalcifies or demineralizers regeneration, salted or food curing processes, surface treatments, etc...
Vacuum evaporation technology allows to concentrate in a highly reduced volume these elements, as well as to re-use the evaporated water in manufacturing processes, especially when associated to a manufacturing process having an energetic excess (chimney smokes, cogeneration, etc...)