26 Mar '12, 2pm

Denver zoo test-drives elephant-poop-powered vehicle

The Denver Zoo has to deal with a lot of waste. A good deal of that waste comes from visitors, but the zoo also produces hundreds of thousands of pounds of animal poo each year. Now, zoo engineers have found a positive use for it: They rigged up a poo-powered tuk-tuk . (A tuk-tuk is a motorized rickshaw.) “We want to show people that we’re not crazy for wanting to take elephant poop and turn it into energy,” one engineer told the Denver Post . And indeed, they are not crazy! In the past, the zoo used some of its waste to power a margarita machine. The tuk-tuk, a 20-year-old model from Thailand, shows they can power a slightly larger and more practical machine (which should not be combined with the earlier achievement — don’t drink poo-powered margaritas and drive poo-powered tuk-tuks, kids). Ultimately, the engineers aim to convert 1.5 million pounds of human and animal wa...

Full article: http://grist.org/list/denver-zoo-test-drives-elephant-poo...

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Denver Zoo shows off tuk tuk powered by animal poo

Denver Zoo shows off tuk tuk powered by animal poo

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