Trevi Systems is a forward osmosis desalination company focusing on energy efficient water purification from a variety of application: saltwater, brackish water and industrial waste-water to clean water. Trevi Systems has designed a forward osmosis system using a proprietary membrane and a unique draw solution that allows the draw solute to be separated from the recovered water using thermal heat rather than high pressure pumps. The process has the ability to desalinate ocean water at 1/8th the electrical energy of current RO systems. The Trevi FO system uses ‘waste heat’ or low grade thermal heat at 75 0C to drive the FO desalination process. Trevi System’s heat requirements are approximately 50MJ/ m3. Since the energy consumption is so low, the brine stream generated may be concentrated to either very low or very high recovery rates without a noticeable change in electrical energy consumption, allowing the system to be tailored to the requirements of the environment.