Japanese companies Hitachi Ltd and Toray Industries Inc have been commissioned by the New Energy and Industrial Technology Development Organization (NEDO) to implement a demonstration project for an energy-saving seawater reverse osmosis (RO) system in Saudi Arabia.

“A low pressure multi-stage high recovery seawater RO system developed by Hitachi and low-pressure seawater RO membranes developed by Toray will be used. The RO system features RO membrane vessels installed in multiple stages, which ienables control of the flow rate and pressure of the feed-water. This maximizes the performance of the RO membranes, ensuring high efficiency. An energy recovery device will reduce the energy required to drive the pump. In addition, the low-pressure membranes ensure a high salt removal rate even with low-pressure operation.”