Systems and methods for osmotically assisted desalination include using a pressurized concentrate from a pressure desalination process to pressurize a feed to the desalination process. The depressurized concentrate thereby produced is used as a draw solution for a pressure-retarded osmosis process. The pressure-retarded osmosis unit produces a pressurized draw solution stream that is used to pressurize another feed to the desalination process. In one example, the feed to the pressure-retarded osmosis process is impaired water.
STATEMENT OF GOVERNMENT SUPPORT
This invention was made with United States Government support under a grant from the United States Department of Energy, Grant No. DE-FG02-05ER64143. The United States Government has certain rights in the invention.