Thursday, February 23, 2012

Gates Foundation Toilet Contest Seeks 'iPad of Sanitation' by Jim Nash

Chances are that if you are reading this, you have a private flush toilet a few steps from your bed. Your commode is more reliable than your mobile connection, and likely will outlast all of your home appliances.
Yet huge tracts of the developing world have yet to see so much as a latrine, a situation that facilitates the spread of debilitating or even deadly diarrheal diseases.

Advocates for universal access to and use of basic personal sanitation hope their efforts will get a big boost in August, when the Bill & Melinda Gates Foundation present several hygienic innovations developed through its Reinventing the Toilet Challenge. Technology alone might help with failing sewers in industrialized countries, but for poor nations, where changing social norms is more important, the Gates Foundation is a powerful ally. The foundation's involvement could do for sanitation what it has accomplished in the battle to eradicate malaria—raise the visibility of a fundamental health care crisis and encourage new efforts to end it.

Toilet tech
According to the United Nations Children's Fund (UNICEF), 2.6 billion people, almost entirely in the developing world, use bucket, public or open (uncovered) latrines—if they use latrines at all. Of that total, 1.1 billion people defecate in the open—a social norm in some societies, but one that results in typhoid, cholera, dysentery and other diseases.



Children in Mozambique stand in a front of a village latrine.
(Credit: Gates Foundation)

One of the foundation's efforts in this fight was to spread $3 million in grants last summer among engineering teams at eight research institutions in North America, Asia, Africa and Europe, including the California Institute of Technology, South Africa's University of KwaZulu–Natal and National University of Singapore. The foundation approached about 20 institutions, eight of which took up the challenge. These teams were charged with developing concepts that: do not use piped-in water; are not connected to a sewer system; do not use outside electricity; and will not cost more than 5 cents per visitor per day to operate, including initial investment and ongoing maintenance.

Several prototypes have been proposed: A team at the Delft University of Technology in the Netherlands proposes using microwaves to turn human waste into carbon monoxide and hydrogen, which would be stored in solid-oxide fuel stacks to generate electricity. Teams at Loughborough University in England and Stanford University are working separately on methods that involve turning waste into charcoal, or biochar.
read more@news.cnet.com 

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