invigorating old yeast for bottling

Discussion in 'Homebrewing' started by inchrisin, Feb 2, 2013.

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  1. inchrisin

    inchrisin Pooh-Bah (2,013) Sep 25, 2008 Indiana
    Pooh-Bah

    I'm wondering if anyone has ever added a dose of sugar after a beer ferments out so that you can rouse things up again for the yeast. That's what they'll be eating when they go in the bottle anyway. Would this do anything for cell viability? It could work for a boozy style like an old ale, RIS or barley wine.
     
  2. VikeMan

    VikeMan Grand Pooh-Bah (3,067) Jul 12, 2009 Pennsylvania
    Pooh-Bah

    I'm not a fan of giving yeast small snacks to 'wake them up' at any time, because AFAIK nobody has ever demonstrated an advantage to doing this, or even a good hypothesis. The priming sugar will cause them to get as active as they need to be. They can't help it.
     
  3. Brewsephus

    Brewsephus Initiate (0) Jan 15, 2012 Massachusetts
    Trader

    You are in danger of leaving residual sweetness in the beer and/or stressing out the yeast by putting too much sugar into the wort when the beer is close to, or at, FG. Regular Corn Sugar is best for bottle conditioning. If you find after 2-3 weeks your bottles are not carbonated enough to your liking, move them to a warm place in your house for a couple weeks and sample again. Don't want any bottle bombs, now do we?
     
  4. clearbrew

    clearbrew Initiate (0) Nov 3, 2009 Louisiana

    My theory:
    By adding sugar to a fermented batch, you would be adding a "reproduction cycle" to the yeast in very inhospitable conditions (low oxygen, high c02, high alcohol, etc...). Therefore, you would likely be degrading the quality of your yeast while increasing the quantity.
    I don't know that there would be any noticeable negative results. I just feel like the bad would slightly outweigh the good, therefore negating the extra step.

    Note: I know "reproduction cycle" might not be the best word to use there, but hopefully you get my point.
     
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