Beef, butter sculptures, and people byproducts have made for some good biofuels. Now Scottish researchers are looking to whisky. Processing whisky waste–pot ale, the liquid in copper stills, and draff, leftovers from grain–researchers at Edinburgh Napier University have created butanol which they claim can provide 25 percent more energy per unit volume than ethanol, a more typical biofuel.
Martin Tangney, project director, told The Guardian that every country should use its own particular brand of waste instead of growing crops for biofuels:
“What people need to do is stop thinking ‘either or’; people need to stop thinking like for like substitution for oil. That’s not going to happen. Different things will be needed in different countries.”
In Scotland’s case those things include the leftovers from a stiff drink. The country’s estimated six billion dollar whisky industry produces 1,600 million liters of pot ale and 187,000 tons of draff annually. In America’s case, perhaps we should instead turn to human fat?
Sugar fermentation makes the conversion from leftovers to butanol possible, and researchers say cars could use the fuel without modifying their engines by using a mixture of butanol and gasoline.
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Image: flickr / foxypar4