Doosan to construct RO desalination plant in Saudi Arabia The Yanbu4 seawater desalination plant will be constructed in Ar Rayyis, located about 260km north of Jeddah and will be applying the reverse osmosis (RO) process, which removes salt from seawater. Doosan plans to construct the Yanbu4 seawater desalination plant on an EPC basis, taking on the responsibilities of engineering, procurement and construction. The desalination plant will supply 450,000 tonnes of potable water daily to the Ar Rayyis region, the western part of Saudi Arabia. (LINK). HIWI042021-01-28T15:14:39+01:00