It started out modestly enough: David Hertz, having learned that under the right conditions you really can make your own water out of thin air, put a little contraption on the roof of his office and began cranking out free bottles of water for anyone who wanted one.
Soon he and his wife, Laura Doss-Hertz, were thinking bigger — so much so that this week the couple won the US$1.5 million Water Abundance XPrize. They prevailed by developing a system that uses shipping containers, wood chips and other detritus to produce as much as 2,000 liters of water a day at a cost of no more than US$0.02 a liter.
The XPrize competition, created by a group of philanthropists, entrepreneurs and others, has awarded more than US$140 million over the years for what it calls audacious, futuristic ideas aimed at protecting and improving the planet.
The first XPrize, for US$10 million, went to Microsoft cofounder Paul Allen and aviation pioneer Burt Rutan in 2004 for SpaceShipOne, the first privately financed manned space flight.
When Hertz learned a couple of years ago that a prize was about to be offered to whoever could come up with a cheap, innovative way to produce clean freshwater for a world that does not have enough of it, he decided to go all in.
At the time, his little water-making machine was cranking out 568 liters a day, much of which was being given to homeless people living in and around the alley behind the Studio of Environmental Architecture, Hertz’s Venice Beach-area firm that specializes in creating green buildings.
He and his wife, a commercial photographer, and their partner Richard Groden, who created the smaller machine, assembled The Skysource/Skywater Alliance and went to work.
They settled on creating little rainstorms inside shipping containers by heating up wood chips to produce the temperature and humidity needed to draw water from the air and the wood itself.
“One of the fascinating things about shipping containers is that more are imported than exported, so there’s generally a surplus,” Hertz said, adding that they are cheap and easy to move around.
If there are no wood chips around for heat, coconut husks, rice, walnut shells, grass clippings or just about any other such waste product will do just fine.
“Certainly in regions where you have a lot of biomass, this is going to be a very simple technology to deploy,” said Matthew Stuber, a professor of chemical and biomolecular engineering at the University of Connecticut and an expert on water systems who was one of the panel’s judges.
He called their water-making machine a “really cool” merging of rather simple technologies that can be used to quickly deliver water to regions hit by natural disasters, stricken by drought or even rural areas with a shortage of clean water.
Hertz and Doss-Hertz are just starting to contemplate how to accomplish that.
Theirs was among 98 teams from 27 countries who entered the competition. Many teams were bigger and better funded, while the couple mortgaged their Malibu home to stay in the game. At one point, they were told they had not made the final round of five, but one team dropped out and they were back in.
“If you say we were the dark horse in the race, we weren’t even in the race,” Hertz said, smiling.
He stood near a giant copy of the check in his office while Doss-Hertz prepared to leave for a photo shoot and a visitor sampled a glass of their freshly made water.
Now, though, they are in for the long, wet haul.
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