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Deep-Sea Desalination Pulls Fresh Water from the Depths
Companies are experimenting with deep-sea tech to produce cheaper fresh water
In the past 25 years reverse osmosis has become more common—it uses high pressure to push seawater through a membrane with holes so small that only water molecules squeeze through, leaving salt behind. Land-based desalination is several times more costly than pulling water from aquifers or lakes, even at giga-plants in the Middle East that benefit from abundant solar power and large economies of scale. * Netherlands-based Waterise has also secured its first industrial customer, with plans to start building a plant in the Red Sea’s Gulf of Aqaba later this year, and Bay Area–based OceanWell is testing its prototype near Los Angeles.
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