Symbiotic reverse osmosis for maximizing desalinated water recovery from saline waters and brines

This invention describes a system for purifying water using a series of interconnected reverse osmosis units, called a "train." Each unit has its own circulating salty water (brine) and shares special filters with its neighbors, allowing the system to extract over 85% clean water. The remaining very salty brine can then be used to generate power or produce commercial salt. The method specifically uses a train with an initial, intermediate, and final unit, maintaining a small salt concentration difference across the filters, and uses pure sodium chloride brine in most units.