Thrifty Scots recycle whisky waste into biofuel


Launched on January 25 as a spin-off from Scotland-based Edinburgh Napier University's Biofuels Research Centre, Celtic Renewables Ltd. is a new company formed to commercialize a process for producing a next generation biofuel (and other high value sustainable products) from the by-products of biological industries. The initial focus is on the waste products derived from whisky production.

Celtic Renewables Ltd. is re-developing a defunct - but proven - fermentation technology that makes efficient use of two main byproducts of whisky production as feedstock: "pot ale," which is the liquid from the copper stills, and "draff," which is the spent grains. The patented technology converts these by-products into "green chemicals", including biobutanol, which is a direct drop-in replacement for gasoline.
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