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Old 05-31-2012, 02:54 PM   #1
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Default Reuse Yeast Left in Carboy

So, I've seen that people will rack their finished beer out of a carboy and then pour their wort on top of the remainder.

My question is..what about all that trub? Doesn't that affect the beer or is it ok?

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Old 05-31-2012, 05:00 PM   #2
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I think it probably depends on the beer. If the 2 beers are similar enough it might not matter. You probably don't want to pitch a witbier on the yeast cake from a double IPA (although you probably wouldn't do that anyway because it would be the wrong yeast, but you get the idea).

I usually wash the yeast and then use it to make a starter. Washing gets rid of most of the trub.

http://www.homebrewtalk.com/f163/yeast-washing-illustrated-41768/

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Old 05-31-2012, 09:59 PM   #3
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As mentioned it really depends on what the initial beer was and what you then want to make and how similar the profiles are. If there is a big difference in the two beers the yeast should be washed so the remaining trub does not have influence on the second brew.

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Old 05-31-2012, 10:02 PM   #4
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Also, keep in mind that dumping on the cake will probably be grossly over pitching unless it's a pretty high gravity brew. Use Mr. Malty to determine how much you need to use when re-pitching from slurry.

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Old 05-31-2012, 11:39 PM   #5
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Way too much yeast better off washing it and using Mr.Malty to calc. the proper amount.

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Old 06-02-2012, 04:01 PM   #6
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Seems like there is a lot of success with this method though. Has to be worth while.

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Old 06-02-2012, 04:09 PM   #7
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It does work, no arguing that. The result will be beer. The question is, how good do you want your beer to be? Saving yeast from the fermenter and repitching it is a very successful practice, but deviating from proper pitching rates is whole different story.

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Old 06-02-2012, 04:14 PM   #8
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It works fine. I've done A/B brews with fresh yeast vs gelled, unwashed, 2nd generation yeast cake and there is very little difference in taste.

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Old 06-02-2012, 05:21 PM   #9
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I had this same thought a while back so asked. I asked a local brewmaster about this cause he also owns a homebrew shop, he said you can, but would be better trying to poor the yeast layer on top of already aerated beer.

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Old 06-02-2012, 06:26 PM   #10
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Quote:
Originally Posted by BBL_Brewer View Post
It does work, no arguing that. The result will be beer. The question is, how good do you want your beer to be? Saving yeast from the fermenter and repitching it is a very successful practice, but deviating from proper pitching rates is whole different story.
Exactly ! A+
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