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Scottish Scientists Develop Whisky Biofuel

RabbitWho writes "It gives a whole new meaning to the phrase 'one for the road.' Whisky, the spirit that powers the Scottish economy, is being used to develop a new biofuel which could be available at petrol pumps in a few years. This biofuel can be produced from two main by-products of the whisky distilling process – 'pot ale,' the liquid from the copper stills, and 'draff,' the spent grains. Copious quantities of both waste products are produced by the £4bn whisky industry each year, and the scientists say there is real potential for the biofuel, to be available at local garage forecourts alongside traditional fuels. It can be used in conventional cars without adapting their engines. The team also said it could be used to fuel planes and as the basis for chemicals such as acetone, an important solvent."

18 of 172 comments (clear)

  1. Mmmm by Anonymous Coward · · Score: 5, Funny

    One for my car... one for me...
    Two for my car... two for me...

  2. Misleading headline. by w0mprat · · Score: 4, Insightful

    IANMOFWF (I am not much of a whisky afficcionado) but I was worried for a minute there. The headline is misleading. They are turning byproducts of the whisky making process into biofuel and not the whisky itself, which would be a travesty indeed.

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    1. Re:Misleading headline. by Scarletdown · · Score: 5, Funny

      I was worried for a minute there. The headline is misleading. They are turning byproducts of the whisky making process into biofuel and not the whisky itself, which would be a travesty indeed.

      Aye, burning whiskey as fuel would be a serious case of alcohol abuse.

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    2. Re:Misleading headline. by oldhack · · Score: 5, Funny

      No kidding - the French complains about everything.

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    3. Re:Misleading headline. by Jon+Abbott · · Score: 3, Informative

      Yep. Also important to consider is that many cars have knock sensors and don't need higher octane fuel. Here's a good article that talks more about it.

    4. Re:Misleading headline. by rapiddescent · · Score: 3, Informative

      I used to work at Glenturret Distillery and pretty much all of the by products were recycled or used in some way. Even the casks were ex-bourbon or ex-Sherry casks. The draff (remainder of the 'mash' process) was picked up by a local farmer twice a day and fed to his cattle (cue corny joke for the tourists about pissed cattle). Very rich in energy apparently.

      Distilleries in the past had had explosions from the from the spirit dense air in the still rooms - I can see why the pot ale (which is actually quite a lot of liquid that is left in the still) is useful for butanol. The spirit safe - a locked glass cupboard in the still room had a mechanical chute to "cut" the spirit run - from a wash still (the first distillation) only about 40% of the total volume was taken for the 2nd spirit still. The article didn't say whether the butanol was made from the wash still pot ale or the spirit still. This has quite significant volume ramifications. A wash still based product would have much larger potential volumes than a spirit still product. Often, a wash still is twice the size of a spirit still. On a slow day we used to make molotov cocktails from spirit and got up to all sorts of high jinks.

      Hopefully this will provide much needed jobs in rural Scotland.

  3. Energy density by by+(1706743) · · Score: 3, Informative

    Butanol has almost the same energy density as gasoline, and burns with less air. Send me a few gallons, and after I rich out the mixture (no fancy computer-controlled mixture for me...), I'll report back!

  4. Scotty, we... need... more... POWER by garyisabusyguy · · Score: 4, Funny

    Aye, ittle be just a weee bit Captain, I have to make sure the fuel is of an acceptable quality... *hic*

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  5. Meh. by SEE · · Score: 3, Interesting

    Making acetone and butanol with the Weizmann organism is downright ordinary. People stopped doing in the the 1940s mostly because hydrocarbon cracking was cheaper than ABE fermentation. The feedstock isn't particularly unusual. Wonder what they're specifically trying to patent.

  6. byproduct by DaveGod · · Score: 3, Insightful

    Scottish Scientists Develop Whisky byproduct Biofuel, is what the headline should read. The current one announces a ridiculous insanity involving using one even more scarce resource when the actual significance is that they've created a use out of a waste product. This is better than something from nothing, since the waste product was itself a problem (though I understand some distilleries were already converting it into fuel to power the plant).

    p.s. I never understood the draw to whisky when I'd tried and found "meh" even the supposed coveted bottles that are semi-widely available until I was signed into the Whisky Society in Edinburgh one night. Sure selling whisky by number without identifying the source is probably another marketing tactic but this was one of those rare "wow" moments where all the hype and marketing hyperbole actually seemed understated. Water of life indeed.

  7. Re:How tiresome. by SEE · · Score: 3, Insightful

    Well, butanol at least meets the energy density (pretty close to gasoline) and ready-to-use (can be used in most gasoline infrastructure as-is) criteria, which means it makes a hell of a lot more sense than ethanol. If, of course, they can make it cost-effective.

  8. Re:Blended or Single Malt? by uvajed_ekil · · Score: 3, Insightful

    What about the Americans? Will we develop a fuel based on Budweiser or Tequila?

    Since this was about whiskey, how about using the byproducts of Bourbon, Tennessee, and other American whiskies, just as can be done with the byproducts of Scotch whiskey? American production dwarfs that of Scotland, tequila is gross, and no one educated about beer likes Budweiser.

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  9. Re:Blended or Single Malt? by lewiscr · · Score: 5, Insightful

    This can be done with the Budweiser by products too. The first step in making Whiskey is to make beer. Then you distill the beer, and age the grain alcohol to get whiskey. "pot ale" is the beer left over after distillation. "draff" is the spent grains, used to make the beer. So Budweiser has tons (many thousands) of draff, but no pot ale.

  10. Re:Unfortunately... by timeOday · · Score: 4, Insightful

    Whether you take the benefit as a decrease in cost or an increase in mobility doesn't really matter in this case. This waste is currently being dumped into the environment anyways, so the net environmental impact of using it as fuel instead should be very small.

  11. Butanol ... by Ungrounded+Lightning · · Score: 3, Interesting

    Butanol, actually.

    I hear butanol has a vapor pressure, ignition point, flame propagation rate, and energy content that let it be dropped in essentially straight as a substitute for gasoline, without retuning modern engines.

    Does anybody have better info than this rumor?

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  12. Re:Powers the economy, eh? by SEE · · Score: 3, Funny

    Yes, but though large, they aren't significant swaths. They're full of No True Scotsmen.

  13. Byproducts - draff by SgtChaireBourne · · Score: 3, Interesting

    It was implied by the article that the spent grain, draff as it is called, is going to waste. I would really hope that is a mistake in the article.

    Spent grain is very nutritious for livestock and unsurprisingly they love it, especially pigs. It's only the alcohol the distillers are interested in, but the farmers and their pigs are interested in the extra nutrients converted by the yeast that remain in the draff. There are also many old, traditional recipes for making bread from spent grain. I know a few that actually brew small beer just to have a supply of spent grain for these recipes.

    These "byproducts" are very valuable economically even they might not have a high direct resale value. It's not too unlike metal shops and the filings swept up at the end of the day. I read about a fellow that had arranged to sweep shop floors at the end of each shift for free. After a few years, he had a small team of employees and was covering many shops in the region and turning a good profit. That was before the metal shortage. Once converted to meat or bread they have high value.

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  14. Re:Scotty, we... need... more... POWER by Aeternitas827 · · Score: 3, Funny

    Turned green. Didn't move for a few days.

    Did he have a strong desire for brains afterward?

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