Seawater into freshwater

According to the World Health Organization (WHO), there are currently more than two billion people worldwide who do not have easy access to clean Seawater into freshwater.

Desalination plants can meet the freshwater needs of some nations by removing salt from seawater.

The Center East has the most noteworthy grouping of these on the planet. In any case, such plants, still for the most part controlled by petroleum derivatives, are energy-serious and the cycle makes a very pungent wastewater known as saline solution, which can harm marine environments and creatures when it’s siphoned once again into the ocean.

Because of this, some startups and researchers are modernizing centuries-old solar still technology, which purifies water by utilizing only sunlight. While the innovation is still quite far off from delivering the volume of freshwater created by desalination plants, it could demonstrate significance for off-framework or beachfront networks.

Manhattan, a startup based in Abu Dhabi that was founded in 2019, is working on a floating solar still that can distill water without using electricity or making brine.

It is made up of a greenhouse structure that is floating on the ocean’s surface: Under the structure, sunlight heats and evaporates water, separating it from the salt crystals that remain in the sea. As temperatures drop, the water condenses into freshwater and is collected inside the structure.

The company’s founder and associate professor at Abu Dhabi’s Khalifa University, Dr. Saeed Alhassan Alkhazraji, claims that “it’s really similar to the natural water cycle.”

Manhattan’s device, in contrast to conventional solar stills, floats in the ocean and draws water directly from the sea.

According to Alhassan, the device does not accumulate salt and the angle of the collection cylinder prevents water droplets from evaporating back into the sea. Manhattan’s patented technology was recognized for its capacity to produce freshwater with “zero carbon footprint and zero brine rejection” earlier this year when it was honored with the Water Europe Innovation Award for small and medium-sized businesses with cutting-edge water solutions.

The startup intends to use its technology in floating farms that would use desalination equipment to provide crops with freshwater irrigation without the need for water transportation or the emissions that go along with that. He also says that the technology could work well in countries like the Maldives that don’t have much land for desalination plants.

Solar stills have also been used by others to innovate. A free-floating desalination unit with a multilayer evaporator that recycles the heat produced when water vapor condenses was developed in 2020 by researchers at the Massachusetts Institute of Technology (MIT).

It was touted as a technology that could “potentially serve off-grid arid coastal areas to provide an efficient, low-cost water source” during the ongoing field tests. The researchers suggested that it could be set up to serve a single household by sitting atop a tank of seawater or as a floating panel in the water that delivers fresh water to the shore through pipes. World News Spot Live


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