Safe drinking water from thin air? That’s the claim of San Luis Obispo, California, based Atmospheric Water Systems (AWS), which offers a product line of air-filtering water systems under the brand Dewpointe. Founded more than a year and a half ago by Co-owner Stephen Krauss, Dewpointe systems takes a different approach to creating safe drinking water. Rather than filtering the water that comes through a pipe, Dewpointe filters the moisture out of the air to create drinking water. There are no water pipes attached to the machine. The rectangular device simply plugs into a wall.

I caught up with Mr. Krauss on the second day of this year’s West Coast Green event held at Fort Mason in San Francisco, California, and found out more about the Dewpointe system.

How does it work? Magic?

No, similar to a dehumidifier, Dewpointe pulls moisture out of the air; but unlike a dehumidifier, the goal of this device is to make that moisture drinkable. A series of filters take out 99.99% of the impurities and create clean drinking water. Impressive as this may sound, it also means that there must be moisture in the air for Dewpointe to operate effectively. Hence, all tropical or even moderate humidity environments in the United States such as coastal states, the south and mid-west work well. In desert environments or low moisture areas such as the south-western US, the Dewpointe will struggle.

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Chris Tobias recently wrote about waste to energy in Singapore, illustrating the city’s exemplary response to fly ash left over from the incineration process. I just read an interesting French book on water, and one of the most interesting parts of the book was about Singapore.

Written by Erik Orsenna, a member of the prestigious Académie française, L’Avenir de l’eau (Water’s future) enables us to travel all around the world (albeit reading) and gathers facts and figures on how water issues differ from country to country.

Perfectly located between East and West Asia, Singapore is an important local hub for 4,000 international companies. The city’s geostrategic importance led to an important population boom, with the number of inhabitants climbing from 1.5 million at the time of independence in 1965 to more than 4.5 million today.

Despite receiving a lot of rainwater (there are 2,415 mm of precipitations per year, compared to roughly 500 mm for San Francisco and 1,200 mm for New York City), the city lacks water.

The precious liquid comes from four main sources: rain, water treatment, desalination and imports from Malaysia. (more…)

For thousands of years, the native Aymara people have been harvesting scarcely fallen raindrops along the Andean foothills in northern Chile by capturing the rainwater in nets for irrigation and drinking purposes. The people in this region, in and around the Atacama desert, are accustomed to fragile ecosystems and an extremely dry climate. However, today, even in the fertile central and southern regions of Chile, there are noticeable tensions over water rights and water availability.

Presently, it is not as if there are times when nothing flows out of the tap here. Nor are the urban folks of Santiago running outside their homes with their own polypropylene mesh nets ready to catch any drop of rain that falls. However, a convergence of factors – an increase in population growth, perceptible changes in climate patterns, and competition for water resources between various industries and hydro power – have caused a national “war over water” of sorts to emerge at the forefront of national environmental, economic, and political discussions.
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Bernie Focker, aka Dustin Hoffman of Meet The Fockers, once said, ”If it’s yellow let it mellow, if it’s brown flush it down.”

Bernie Focker, though an imaginary character, spoke of real life issues: water conservation. Even though the water crisis has taken a backseat to other issues such as carbon emissions, the problem is real: By 2025, the world will experience major freshwater shortages. Though 97% of water comes from oceans, only about 3% of it is freshwater. From that, 2.4% is permanently frozen in glaciers and ice caps, 0.5% of Earth’s water is ground water, and the rest can be found in rivers and lakes (also known as surface water).

Since our water comes from ground and surface water, that’s a small percentage overall. And because of our ever-growing population and water needs, rising temperatures and droughts, the US government estimates that about 36 states will face water shortages by 2013.
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The Israel Export and International Cooperation Institute reports that water technology exports totaled $1.4 billion in 2008 – double the 2005 amount. The global water market is worth $400 billion annually and is expected to rise to $537 billion next year.

To mark World Water Day, the Export Institute published figures about the country’s water technologies industry. There are 250 companies in the sector of which 200 export their products. 50 companies in the sector are defined as start-ups.

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