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Old 12-19-2009, 07:49 PM   #1
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Default yeast cake

I have heard that you can reuse the yeast after taking the beer off the primary fermentor. Can anyone outline this procedure. How long will the yeast remain usable after you harvest it.

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Old 12-19-2009, 07:56 PM   #2
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check the yeast washing sticky....all the info you need.

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Old 12-20-2009, 12:33 PM   #3
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Nice read. I have two questions though;
1. when you do this, how long does the yeast keep its viability in the fridge?
2. How many times can you do this (or would it be recomended to do this) with a single strain of yeast? Use the jar of "washed" yeast in a batch and then don't bother trying to wash the same yeast again? Thinking out loud here, but is seems like more than once would be kinda risky on account of contamination. Though I have heard of people pitching a yeast cake as many as 12 times.
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Old 12-20-2009, 12:59 PM   #4
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1. according to the YWI the water used in washing is deoxygenated and helps extend the shelf life of the washed yeast. IIRC some people have keep it viable for 6 months, but 3 months is where I would quit.
2. each generation of yeast promotes the chance of mutation from the original strain. I have gone 5 generation without a problem.
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