The SIREG units called HYDROS®, apply the reverse osmosis system in order to demineralize, to desalinate and to purify the water. By exploiting the characteristics of special semi-permeables membranes , without adding any chemicals, they totally remove from the water organic pollutants (bacteria, virus , ect) inorganic pollutants (herbicides, pesticides ect.) and, according to the requirements, up to 98 % of salts in solution. The water entering the purifier is subjected to a preliminary treatment to remove solid particles (sand, rust, ect.). The treatment is performed with two or more forced filtration modules. The water out from the filtration section is conveyed, to reverse osmosis membranes in which the purification or demineralization treatment takes place. Two flows are conveyed from the reverse osmosis modules:

• A purified or demineralized water flow, called permeate, for different uses.
• A concentrated water flow to convey to the discharge or, according to the plant configuration, to the use, to reconvey totally or partially to the purification cycle.