NOVELTY - The system (800) has semi-permeable membrane system that separates first chamber from second chamber and solvent from first solution such that second solution is formed in first chamber and dilute draw solution in second chamber. A separation system (830) fluidly communicates with forward osmosis unit and source of thermal energy (880,880') to separate dilute solution into concentrated solution and solvent stream. The inlets receive dilute solution and source of thermal energy. The outlets introduce concentrated solution to forward osmosis unit and output the solvent.    USE - System for osmotic extraction of solvent from first solution such as non-potable water e.g. seawater, salt water, brackish water, gray water, wastewater or some industrial water, for use during osmotically driven membrane processes (ODMP) such as forward osmosis, with renewable energy source such as solar thermal power plant or geothermal installation.    ADVANTAGE - The separation system fluidly communicates with forward osmosis unit and source of thermal energy to separate dilute draw solution into concentrated draw solution and solvent stream. Thus, the systems can produce fresh water from the waste concentrate of sea water reverse osmosis (SWRO), multiple effect distillation (MED) and multi stage flash (MSF) and dramatically reduce the volume of the water required for concentrated solar power (CSP) plant. Hence, the plant capacity is increased with the existing intake and outtake structures, without increasing the pre-treatment cost, by turning a waste into a valuable product.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for osmotically extracting solvent from first solution.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the system for osmotic extraction of solvent from first solution.    System for osmotic extraction of solvent from first solution (800)    Separation system (830)    Steam turbine (870)    Source of thermal energy (880,880')    Interface module (890)