Ras Mohaisen seawater reverse osmosis desalination plant (Saudi Arabia)

Ras Mohaisen desalination plant is located 300 kilometres south of Mecca, in the Western Province of Saudi Arabia and has the capacity to treat 300,000 m³/day.

The project stands out for its significant storage capacity, as it includes the construction of four desalinated water tanks with a total capacity of 600,000 m³, which will allow the plant to have the equivalent of two days of operation in reserve. Additionally, a new 132/33 kV electrical substation with associated overhead transmission line and a 30 MW solar PV plant, enhancing the facility’s sustainability, will be provided as part of project scope.

Lantania, together with L&T, is the turnkey contractor for the project, responsible for the design, procurement, construction, testing and commissioning of the pre-treatment, reverse osmosis process and post-treatment of the desalination plant. The works include the construction of intake and outfall system, pumping station, pre-treatment, reverse osmosis system with energy recovery, post-treatment, as well as all associated electrical and instrumentation installations.

The desalination plant will serve as a source of drinking water for the regions of Makkah Al-Mukarramah and Al-Baha, catering to approximately one million inhabitants.