SeawaterScreenSurface of RO membraneRO membraneCoagulationSedimentationIntake PumpSand FilterFiltrateTank23FeedPumpRO membraneFreshWaterSaltDirtWater1nmøAfter passing through several pretreatment steps, seawater is passed through a reverse osmosis (RO) membrane, removing the salt and giving fresh water. The Romembra® reverse osmosis membrane developed by Toray. Nanopores allow water molecules to pass through, but remove particulates and even ions. The shape of the RO membrane element is determined by bundling the membrane in a way that maximizes its performance for removing impurities and producing fresh water.Satoshi Shimoyama, general manager of the Water Treatment Division. Upon entering Toray, he has served in global business activities, and since 2006 he has successfully expanded the water treatment membrane business around the world. He leads the Water Treatment Division since 2018.method is environmentally friendly. Toray’s RO membrane has been introduced to 76 countries around the world. The cumulative amount of membranes shipped, if converted into water, is the equivalent of about 60 million tons of fresh water every day. That corresponds to the daily water requirements of 420 million people, making technology particularly welcome to nations with dry climates in Africa and the Middle East, where it provides much-needed drinking water. Other versions of the same filtration technology are being used to reclaim sewage water and industrial wastewater, and to provide ultrapure water that is indispensable for manufacturing semiconductors. The company has developed other water in addition to the RO membrane, and offers suitable combinations tailored to local circumstances, such as the quality of the water source and the treatment membranes the intended use of the recycled water. With many regional centers to provide production, sales, and technical services around the world, Toray has capabilities for replacing filters, assessing local water quality, and providing valuable training for local technicians. Having made major contributions to this vital area, Toray sees another factor as absolutely essential for developing technology, as Shimoyama explains. “Desalinization is not something that Toray can do by itself. We depend on feedback from the plant operators and engineering fi rms that use our membranes. All the players in the fi eld conscientiously strive to perfect the technology at every opportunity. At Toray, we look beyond the business opportunities, because we want to contribute to society through improving water processing technology in cooperation with enterprises throughout the world.” By mobilizing leading-edge technology, perhaps the day will soon arrive when humans will no longer suffer from water shortages anywhere in the world. Typical System Flow of Seawater Desalinization Plant
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