DESALINATION SYSTEM AND METHOD

The present disclosure provides a desalination system that includes a desalination unit that receives a first stream for desalination and a second stream to carry away ions removed from the first stream. A precipitation unit is in fluid communication with the desalination unit and circulates the second stream to the desalination unit. The system also (a) includes a pre-treatment unit upstream of the desalination unit that receives a feed stream and at least one pre-treatment chemical, and produces an ion-reduced first stream for the desalination unit; (b) adds lime into the precipitation unit, or into the second stream passing through the precipitation unit; and/or (c) includes a membrane-based purification device that receives a desalinated output stream from the desalination unit.