Inexpensive system can disinfect water
WEST LAFAYETTE, Ind. (UPI) -- A new technology using UV light fromsunlight can disinfect drinking water for large parts of the world'spopulation easily and cheaply, U.S. researchers say.
A team of Purdue University researchers says the system, in whichsunlight is captured by a parabolic reflector and focused onto aUV-transparent pipe through which water flows continuously, could helpthe world's 800 million people who lack safe drinking water.
"We've been working on UV disinfection for about 20 years," Ernest R.Blatchley III, a professor of civil engineering, said in a Purduerelease Thursday. "All of our work up until a couple years ago dealtwith UV systems based on an artificial UV source. What we are workingon more recently is using ultraviolet radiation from the sun."
The researchers say there were motivated to develop a practical,inexpensive water-treatment technology for developing nations.
"The water available for people to drink in many developing countrieshasn't been treated to remove contaminants, including pathogenicmicroorganisms," Blatchley said. "As a result, thousands of childrendie daily from diarrhea and its consequences, including dehydration.
"Half of the world's hospital beds are occupied by people who aresickened by the water they drink."
The researchers say their system, costing less than $100 for materials, was able to inactive E. coli bacteria and that improvementsshould prove effective against other deadly pathogens.
Copyright 2011 by United Press International
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