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San Francisco to test turning = dog waste=20 into power
Tue Feb 21, 2006 7:11 PM ET
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SAN FRANCISCO (Reuters) - San Francisco, a leader in = urban=20 recycling, is preparing to enlist its canine population for = a first=20 in the United States: converting dog poop into energy.

Norcal Waste Systems Inc., the city's garbage company, = plans to=20 test collection carts and biodegradable bags in a = city-center park=20 popular with dog walkers.

A city study found that almost 4 percent of all the = garbage=20 picked up at San Francisco homes was from animal waste = destined for=20 the city's landfill, Norcal Waste spokesman Robert said. San = Francisco has an estimated 120,000 dogs.

"The city asked us to start thinking about a pilot = program to=20 recycle the dog poop in order to cut back adding more waste = in=20 landfills," Reid said.

Dog feces could be scooped into a methane digester, a = device that=20 uses bugs and microorganisms to gobble up the material and = emit=20 methane, which would be trapped and burned to power a = turbine to=20 make electricity or to heat homes.

Dogs and cats in the United States produce about 10 = million=20 tonnes of waste a year, Will Brinton, an environmental = scientist and=20 owner-director of Woods End Laboratories in Maine, said.

"As much as we love them, our pets leave a lot of manure = behind=20 them in yards and on the street and that can be a major = source of=20 contamination of groundwater," Brinton said.

European cities such as Zurich, Frankfurt, Munich and = Vienna are=20 operating biomass programs to turn waste into gas, he = said.

San Francisco runs an aggressive program to recycle = bottles,=20 cans, paper and other trash and now diverts two-thirds of = its=20 garbage away from landfills.

The city's goal is a 75 percent diversion by 2010 and = zero new=20 waste in landfills by 2020.



=C2=A9 Reuters=20 2006. All Rights Reserved.


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