Desalination system: a "thirst-quenching solution" for water-scarce regions worldwide

On the coast of Rabigh, Saudi Arabia, giant water intake pipes, resembling straws, extend into the Persian Gulf, pumping 1.5 million tons of seawater daily into the treatment plant. After several layers of filtration and reverse osmosis treatment, 600,000 tons of clean drinking water flow through these pipes into local homes.

In this arid land where rainfall is scarce year-round, reverse osmosis technology acts as a savior, helping locals escape the torment of water shortages. Similar scenes are unfolding in many water-scarce regions around the world.

Saudi Arabia is the world's largest desalination country, and its desalination projects are highly representative. The technical team innovatively modified the arrangement of the reverse osmosis membranes, adding a special plug in the middle of the membrane shell. This allows the relatively clean water filtered by the first three membranes to directly enter the next process. This results in a production rate of only 2.773 kilowatt-hours of electricity per ton of water, making it the most energy-efficient in the industry. From intercepting large impurities of 5 millimeters to filtering out tiny impurities of 5 microns, every step is carefully controlled to ensure the stable operation of the delicate reverse osmosis membranes. Saudi Arabia currently has 43 desalination plants nationwide, producing 13 million tons of fresh water per day.

In Abu Dhabi, UAE, there is the world's largest reverse osmosis desalination facility, producing 900,000 tons of fresh water per day. It uses corrosion-resistant super duplex steel pumps and advanced reverse osmosis membrane technology, producing enough water for 2 million people's daily drinking needs.

Dubai has a longer-term vision, combining solar energy and reverse osmosis technology, planning to use clean energy entirely for desalination production by 2030. This will not only reduce pollution but also save 13 billion dirhams in costs.

Singapore uses pre-treated wastewater as raw material, first filtering impurities through microfiltration and then further treating it with reverse osmosis membranes. The treated water has over 99% less salt and almost completely removes organic matter, exceeding WHO standards by a significant margin. This "wastewater-to-clean-water" method is particularly effective, now meeting 40% of the country's drinking water needs and becoming a model of water conservation.

From Saudi Arabia's technological innovations to save on electricity costs to Singapore's wastewater recycling, reverse osmosis technology is constantly being upgraded to help the world solve its water shortage problem. 

Today, this technology is no longer just an industrial device, but has become a "water hope" that ensures countless people have access to clean drinking water.