Blog Posts

quinta-feira, 9 de setembro de 2010

Uma Invenção do caraças!

Àgua própria para o consumo...
Porque se ELETROCUTARAM as Bactérias!

20 Volts chegam, são mortas instantâneamente, e com uma voltagem tão baixa, até se pode produzir a Electricidade à Manivela!

Zap, They're Dead! New Water Filter Electrocutes Bacteria

Analysis by David Teeghman 

America has some of the cleanest drinking water on Earth, but in many developing countries, clean water is oftentimes hard to come by. Bacteria and other nasty organisms give rise to such waterborne illnesses as cholera, typhoid and hepatitis.

Many scientists are working on inexpensive and simple technologies that can clean water and make it safe to drink. Among them are Yi Cui and his colleagues at Stanford University, who have developed a new type of water filter that is 80,000 times faster than existing filters and less expensive than what's available today. It doesn't cost much because there are no moving parts and it uses very little power.

Just about everyone I know has some type of water-filtering pitcher in their refrigerator, or one hooked up directly to their faucet. While those filters physically trap most bacteria from flowing into water, this new nanofilter actually lets bacteria flow right through.

Instead, those bacteria pass through several layers of cotton, where an electrical field zaps them with 20 volts of electricity for several seconds. It's a technique that researchers have dubbed conductive "nano-coated" cotton. Twenty volts is barely enough to make a human tingle, but tests found that more than 98 percent of Escherichia coli bacteria were killed instantly.

And because the voltage is so low, it doesn't require serious electricity generation. A person could generate the power from a stationary bike or a hand-cranked device. No pumping is required either. The force of gravity is enough to allow the water and its nasties to pass through the cotton and get zapped!

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