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Saudi Neom megacity plans world-first ‘solar dome’ desalination plant

It is claimed that the technology generates no carbon emissions, produces less brine than facilities using conventional reverse osmosis technology and will process drinking water more cheaply than traditional plants.

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Saudi Arabia plans to use new solar technology to desalinate seawater at Neom, a mega-city that it is developing along the country’s northern Red Sea coast.

 

The city’s developer has signed a deal with UK-based Solar Water Plc to build its first-ever ‘solar dome’ desalination plant.

 

It is claimed that the technology generates no carbon emissions, produces less brine than facilities using conventional reverse osmosis technology and will process drinking water more cheaply than traditional plants.

 

Neom’s developer has signed a deal with UK-based Solar Water Plc to build its first-ever ‘solar dome’ desalination plant.

 

The technology involves a dome – a hydrological sphere – constructed from glass and steel into which sea water flows. The energy to heat the continuous inflow of water and to create a constant water cycle is produced by concentrating solar radiation, from a large number of parabolic mirrors (heliostats) surrounding the domes, onto the glass and superconductive steel frame structure. Through this process, the sea water evaporates, condenses and is precipitated as fresh water.

 

The brine gathers at the bottom of the dome’s basin, is extracted and sold commercially for industrial use in lithium batteries, grit for roads, fertiliser or detergents. According to Solar Water, 90 per cent of desalination plants dispose of brine through ocean discharge, causing damage to marine ecosystems.

 

 

NEOM

 

Nadhmi Al-Nasr, CEO of Neom, said: “Easy access to abundant seawater and fully renewable energy resources means Neom is perfectly placed to produce low-cost, sustainable fresh water through solar desalination. This type of technology is a powerful reminder of our commitment to supporting innovation, championing environmental conservation and delivering exceptional liveability. Working together with the Saudi Ministry of Environment, Water and Agriculture we can expand the implementation of this technology beyond Neom.”

 

Neom is the vision of His Royal Highness Crown Prince Mohammed Bin Salman and is central to Saudi Arabia’s 2030 Vision plan to grow and diversify the Saudi economy.

 

Neom is the vision of His Royal Highness Crown Prince Mohammed Bin Salman and is central to Saudi Arabia’s 2030 Vision plan to grow and diversify the Saudi economy. The $500 billion project has promised everything from robot workers and flying cars to beaches with glow-in-the-dark sand and an artificial moon. However, many have questioned whether the initiative is realistic politically or economically.

 

Test case

 

Solar Water Plc says it will start work on the first dome in February and the project is expected to be completed by the end of 2020.

 

David Reavley, CEO of Solar Water Plc, commented: “Our game-changing desalination technology is 100 per cent carbon neutral and entirely sustainable. In NEOM we have found a partner who has a strong vision of what a New Future looks like in harmony with nature.”

 

“With over one billion people around the world lacking access to clean water every day, Solar Water Plc and Neom’s desalination project will also serve as a test case for other water-scarce countries that are struggling to generate environmentally safe and sustainable sources of fresh water,” he added.

 

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