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| A Scottish biotech company has found a way of turning on its head the adage that drinking and driving should never mix – by developing a fuel for cars that uses the by-products of whisky-making. |
| Scotland's national tipple comprises barley, yeast and water, and the manufacturing process leaves behind spent grains, known as draff, and a sugary liquid called pot ale. |
| This waste is often used as an animal feed or even pumped into the sea, but it can also be converted to produce acetone, butanol and ethanol - chemicals used in everything from fuel and food production to medicine and cosmetics. |
| "We can take residues from industries such as the whisky industry and convert them into high-value products, namely butanol, which is actually being used to power this car," company owner Martin Tangney said. |
| "We bring sustainability to an iconic industry." |
| The company's demonstration plant in Grangemouth can produce 1 million litres of sustainable biochemicals from 50,000 tons of draff and pot ale and other raw materials. |
| It plans to build five large-scale refineries worldwide in the next five years, and is calling for backing from governments and other investors. |
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