Archive for August 6, 2015

Erkin | August 6, 2015
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Opinion: Water and the World We Want

HAMILTON, Canada, Feb 25 2015 (IPS) – We have entered a watershed year, a moment critical for humanity.

As we reflect on the successes and failures of the Millennium Development Goals, we look toward the post-2015 Sustainable Development Goals to redress imbalances perpetuated through unsustainable economic growth and to help achieve key universally-shared ambitions, including stable political systems, greater wealth and better health for all.

little-girls-water

Little girls in Timor-Leste cross a rice field after heavy rains carrying water in plastic containers. Credit: UN Photo/Martine Perret

Threat of a global water crisis is often mischaracterised as a lack of water to meet humanity’s diverse needs. It is actually a crisis of not enough water where we want it, when we want it, of sufficient quality to meet needs. Read more

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Erkin | August 4, 2015
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Drinking Water From Air Humidity

Not a plant to be seen, the desert ground is too dry. But the air contains water, and research scientists have found a way of obtaining drinking water from air humidity. The system is based completely on renewable energy and is therefore autonomous.

111Cracks permeate the dried-out desert ground, the landscape bears testimony to the lack of water. But even here, where there are no lakes, rivers or groundwater, considerable quantities of water are stored in the air. In the Negev desert in Israel, for example, annual average relative air humidity is 64 percent – in every cubic meter of air there are 11.5 milliliters of water.

Research scientists at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB in Stuttgart working in conjunction with their colleagues from the company Logos Innovationen have found a way of converting this air humidity autonomously and decentrally into drinkable water. “The process we have developed is based exclusively on renewable energy sources such as thermal solar collectors and photovoltaic cells, which makes this method completely energy-autonomous. It will therefore function in regions where there is no electrical infrastructure,” says Siegfried Egner, head of department at the IGB. The principle of the process is as follows: hygroscopic brine – saline solution which absorbs moisture – runs down a tower-shaped unit and absorbs water from the air. It is then sucked into a tank a few meters off the ground in which a vacuum prevails. Energy from solar collectors heats up the brine, which is diluted by the water it has absorbed. Read more

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