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Old 03-10-2010, 03:31 PM   #1
cbdeacon
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Default Harvesting from a Yeastcake

Never done it...know to use sterilized, airtight container, but how much should I harvest in a quart container, and how much should I use for a 5 gallon pale ale?
thanks



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Old 03-10-2010, 03:41 PM   #2
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You do NOT want an airtight container. LOOSELY cover the container or pressure may build up. Here is what I do:
- Boil 3 quarts of water and cool
- Sanitize 4 or 5 quart mason jars and tin foil (for covers)
- Dump water onto yeast cake, shake it all up very well and pour liquid into mason jars
- Wash the yeast a few times
The amount of yeast you end up with really depends on how many times you wash it and the amount that is in the bottom of your fermenter. The amount you use for your next batch depends on it's OG.



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Old 03-10-2010, 03:51 PM   #3
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If the fermentation is done, and the yeast is washed (no fermentables in it), why don't you want to tightly close it? I don't understand that.

I wash yeast, put in sterilized jars in the fridge, with the tops on tightly. I don't want them to get contaminated.

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Old 03-10-2010, 03:58 PM   #4
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Quote:
Originally Posted by YooperBrew View Post
If the fermentation is done, and the yeast is washed (no fermentables in it), why don't you want to tightly close it? I don't understand that.

I wash yeast, put in sterilized jars in the fridge, with the tops on tightly. I don't want them to get contaminated.
Same here, especially with ball jars, which wont hold a positive seal anyways.
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Old 03-10-2010, 04:15 PM   #5
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I haven't quite put my arms around the "washing process"

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Old 03-10-2010, 04:35 PM   #6
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I dump out half of the yeast cake, seal up the fermenter with an airlock, pitch my next brew when ready.

Unless the first batch was infected, your fermenter is most likely still "clean".

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Old 03-10-2010, 04:39 PM   #7
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Quote:
Originally Posted by cbdeacon View Post
I haven't quite put my arms around the "washing process"
Start here. It has worked great for me. I now have 4 different types of yeast stored in my fridge.
http://www.homebrewtalk.com/f163/yeast-washing-illustrated-41768/
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Old 03-10-2010, 05:17 PM   #8
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I think the process I was told not to seal the container was during washing, not necessarily harvesting. If there was not a block on the site, I would check it (Illustrated Brewing) to see if my thinking it is on there is right.

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Old 03-10-2010, 08:24 PM   #9
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I keep washed yeast in jars (or Grolsch bottles) that have been boiled, even the lids. Then, it's stored in my fridge. The yeast will last a long time that way, and all I have to do is take out a Grolsch bottle of yeast and add it to a starter and have all the yeast I need.

Right now, I have about 5 different yeast strains washed and in my fridge. It's much better than paying $6 (or more) a vial!

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Old 03-10-2010, 08:32 PM   #10
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Whenever I buy a vial of yeast I try to reuse it at least once.
One day when I've got enough cold storage I'd like to create a frozen yeast bank... long ways off though.



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