GREEN & SUSTAINABLE
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GREEN & SUSTAINABLE
Food as Fuel
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Corncobs into Ethanol
- How it works: Cellulose, the main component of corncobs, is more difficult to break down and ferment than corn, but POET Energy is developing a process to do it efficiently.
- Who’s trying it: POET, the world’s largest ethanol producer, is converting an existing biorefinery in Emmetsburg, Iowa.
- Comparative Cost: POET is still in the research phase, assisted by a grant from the U.S. Department of Energy.
- The numbers: Using the cobs will produce 27 percent more ethanol per acre of corn. To produce the goal of 25 million gallons of ethanol from cobs (which would power 50,000 Americans’ cars for a year), POET would need to use the cobs from about 275,000 acres’ worth of corn.
- Timeline: Operation of the converted biorefinery will begin in 2011.
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