Corn ethanol curse strikes again? Algae fuels have large footprint

GreenBang.com
By Greenbang on Jan 21, 2010 in Energy and Fuel

Could algae-based biofuels suffer the same fate as the now much-discredited corn-based ethanol? They might, if we don’t find ways to reduce algal fuel’s environmental impact, according to a new study.

After the race to turn corn into fuel helped spark a global spike in food prices, clean-energy proponents turned their sights to so-called “second-generation” biofuel stocks. These include non-food crops like switchgrass and algae, as well crop waste and lumber waste. Algae have been widely considered to have especially great potential, since they can be grown in marginal areas that don’t compete with prime food-growing farmlands.

But there’s a problem — or, rather, several problems — with that idea, according to a team of researchers from the University of Virginia. Their new study finds that growing algae for fuel is more energy- and water-intensive than other biofuel crops, including switchgrass, canola and corn. Oh, and it also produces more greenhouse gas emissions than those other sources.

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