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At PARC, purifying wastewater without a filter

By | November 23, 2010, 7:02 AM PST

In the heart of Silicon Valley at the Palo Alto Research Center, scientist Meng Lean hovered proudly over his invention. I went with the SmartPlanet video crew to PARC to visit Lean’s cluttered laboratory to see the water inventor in his element and to see exactly how the device worked.

Lean said his machine might impact the way we purify water in the future. The hydrodynamic separation system splits the waste particles from the clean water.

In the video, you’ll see that the black, carbon particles separate from the clean water. The membrane-less filtration system takes advantage of how water moves. That way, the device doesn’t need a filter to separate clean water from wastewater.

The water machine uses centrifugal force to efficiently recycle the waste stream. The device was born when Lean was designing a water purification system for the Army years ago.

Lean thinks his machine can be used for desalination, which is a process that separates salt from seawater to produce drinking water or water good enough for irrigation purposes.

There’s a real market for a machine like this.

“There’s an urgency to create a portable water solution,” Lean said. “This water machine could be used to supply water to small communities.”

But the water is not drinkable like the one we wrote about a few weeks ago (LifeGivingForce’s water machine). Or else you would have seen Lean taking some sips from the hose instead of holding it up in beakers.

But the water would be good enough to clean your car. An oil company, for instance, could use the system to recycle the water from its normal operations.

The machine offers a cheap and more efficient way to purify water. It will be interesting to see if the water machine ever makes its way out of the humble PARC laboratory and into the world like many other PARC inventions have been destined to.

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Boonsri Dickinson

About Boonsri Dickinson

Boonsri Dickinson was a contributing editor for SmartPlanet from 2010 to 2012.

Boonsri Dickinson

Boonsri Dickinson

Contributing Editor, Science

Boonsri Dickinson is a freelance journalist based in San Francisco. She has written for Discover, The Huffington Post, Forbes, Nature Biotech, Technewsdaily.com, Techstartups.com and AOL. She's currently a reporter for Business Insider. She holds degrees from the University of Florida and the University of Colorado at Boulder.

Follow her on Twitter.

Boonsri Dickinson

Boonsri Dickinson

In the unlikely event that Boonsri has a professional or financial relationship with a company she writes about, it will be prominently disclosed.

She writes for SmartPlanet and is not an employee of CBS.

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RE: PARC scientist built a machine that purifies water through movement
Is there a cost of pushing this water through the process? Check
out In-Pipe Technology for a less expensive way of cleaning water:
www.in-pipe.com
Posted by mrissman1@...
23rd Nov 2010
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RE: PARC scientist built a machine that purifies water through movement
This of course will not filter out chemicals dissolved in the water.

Heavy metals, bacteria, viruses and excess nitrogen still needs to be removed....

Which is why Lean doesn't drink from it. He's not daft!
Posted by ProfQuatermass
24th Nov 2010
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RE: PARC scientist built a machine that purifies water through movement
I'm surprised continuous centrifugal separation is a new technology, 'cause it has been used for air for ages: Any pneumatic system of any size from a solo mechanic's shop on up to huge industrial facilities will have centrifugal air filters.

For that matter, if you have a Dyson vacuum cleaner, you are using similar technology.
Posted by CodeCurmudgeon
24th Nov 2010
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