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MIT scientists build briefcase-sized machine to turn saltwater into drinking water – Massachusetts, USA

Mr Yoon told MIT News in April that portable desalination units typically require high pressure pumps to push salt water through the necessary filters, compromising the energy efficiency of the device. However, that’s not true with the new device, which does not rely on high pressure pumps and only requires as much power as a cell phone charger to operate.

Instead of using pumps, the MIT device relies on a process called ion concentration polarization in which an electrical field is applied to membranes placed around the water that can repel positively and negatively [
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MIT scientists build briefcase-sized machine to turn saltwater into drinking water – Massachusetts, USA2022-09-14T04:03:01+02:00

THIS $4 DESALINATION DEVICE PROVIDES DRINKING WATER FOR THE WHOLE FAMILY- China

So far, the prototype system has worked in the lab for at least a week without accumulating salt. The next challenge is to scale it to something more practical, but


Researchers at MIT and in China have improved the old-fashioned solar still with a new inexpensive device that harnesses the sun to remove salt from water.

The key to this new technique is black paint and polyurethane with 2.5-millimeter holes drilled in it. The idea is that warmer water above the insulating medium causes the salt to concentrate in the cooler water beneath [
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THIS $4 DESALINATION DEVICE PROVIDES DRINKING WATER FOR THE WHOLE FAMILY- China2022-12-11T23:19:30+01:00

System achieves new level of efficiency in harnessing sunlight to make fresh potable water from seawater – Cambridge

A completely passive solar-powered desalination system developed by researchers at MIT and in China could provide more than 1.5 gallons of fresh drinking water per hour for every square meter of solar collecting area.

Such systems could potentially serve off-grid arid coastal areas to provide an efficient, low-cost water source.

The system uses multiple layers of flat solar evaporators and condensers, lined up in a vertical array and topped with transparent aerogel insulation. It is described in a paper appearing today [
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System achieves new level of efficiency in harnessing sunlight to make fresh potable water from seawater – Cambridge2020-03-13T15:29:54+01:00

Scientists create simple, solar-powered water desalination – China

A completely passive solar-powered desalination system could provide more than 1.5 gallons of fresh drinking water per hour for every square meter of solar collecting area.

Such systems could potentially serve off-grid arid coastal areas to provide an efficient, low-cost water source.

The system uses multiple layers of flat solar evaporators and condensers, lined up in a vertical array and topped with transparent aerogel insulation.

(LINK).

Scientists create simple, solar-powered water desalination – China2020-02-08T17:52:57+01:00

MIT suggests a different approach to reducing the rate of fouling – USA




The prevailing idea in the industry has been that the high pressure required by RO is responsible for the relatively high rate of fouling, compared to other systems such as forward osmosis. But the MIT study shows that this is not the case, a finding that opens up new approaches to reducing fouling in RO. The research, by Emily Tow ’12, SM ’14, PhD ’17 and MIT Professor John H. Lienhard V, was recently published in the Journal of Membrane Science and presented at the 2017 AMTA/AWWA Membrane Technology Conference, where it received the Student Best Paper Award.

MIT suggests a different approach to reducing the rate of fouling – USA2017-10-16T07:49:37+02:00
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