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Old 06-25-2013, 02:59 AM   #1
Brewmex41
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Default How do I reuse yeast?

I tried to do a search but the search function on the Android app sucks.
Anyways can someone help me find resources for washing yeast and pitching on yeast cakes?
Also, can I reuse Hef (wpl320 if I remember correctly) yeast, or will most of it end up in the bottles?
Thanks for helping a noob lol

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Old 06-25-2013, 04:43 AM   #2
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Yes you can reuse it.

Have a look at this thread.

http://www.homebrewtalk.com/f163/yea...strated-41768/

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Old 06-25-2013, 05:08 AM   #3
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Perfect, thanks so much! Bookmarked this page!

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Old 06-25-2013, 05:47 AM   #4
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if your yeast is healthy and you are using it pretty soon after your last batch you can just pitch the old yeast directly without rinsing. i save the slurry in a clean bottle, let it settle, estimate the amount of yeast cells using mrmalty.com, this is a very gross estimate but it's fine, and pitch directly into the next brew.

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Old 06-25-2013, 06:19 PM   #5
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I'm not sure how quick ill reuse it yet. I'll probably keep it in the fridge for a little while.

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Old 06-25-2013, 06:26 PM   #6
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Another option is top-cropping.

Basically you skim the foam off the surface of fermenting beer (2-3 days into fermentation) and store it in a sanitized jar in the fridge. Very simple.

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Old 06-25-2013, 06:31 PM   #7
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I already missed that stage lol
I feel like that would be easier with a fermenting bucket rather than a carboy though.

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Old 06-25-2013, 06:49 PM   #8
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Quote:
Originally Posted by TyTanium View Post
Another option is top-cropping.

Basically you skim the foam off the surface of fermenting beer (2-3 days into fermentation) and store it in a sanitized jar in the fridge. Very simple.
You get the most bang-for-your-buck by repitching it immediately, rather than storing it in the fridge. When you top-crop, you're capturing extremely healthy yeast at the height of their activity. If you're just going to seal them in a jar and put them to sleep, you might as well just wait and wash the yeast cake instead.

Quote:
Originally Posted by brewmex41
I feel like that would be easier with a fermenting bucket rather than a carboy though.
Potentially, but you'd risk oxidizing your beer. There are good descriptions in books (like White/Zainasheff's "Yeast"), but basiclaly, to collect yeast from the top of an actively fermenting ale in a carboy, you simply insert a (sanitized) stainless "straw" into the bunghole, with the tip pushed in just deep enough to touch the foamy krausen. The output end has a plastic tube running to the collection vessel, such as an Erlenmyer flask, fitted with one of those orange carboy caps with the 2 holes in it. The tube connects to one hole, with a plain old airlock on the other hole.

The pressure from the fermenting beer pushes the yeast and foam up the stainless steel "straw," through the tubing, and into the flask. The CO2 pressure then vents out the airlock atop the flask.
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Old 06-25-2013, 07:29 PM   #9
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Washed yeast saved me last night. I did multiple batches this week and had a damaged yeast pack. Luckily I had some washed ale yeast in the fridge. My first mistake was not checking all my supplies before mashing. It was good the day prior. At 930 pm it could of got real bad had I not had washed yeast on hand.

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Old 06-25-2013, 07:35 PM   #10
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Quote:
Originally Posted by kombat View Post
You get the most bang-for-your-buck by repitching it immediately, rather than storing it in the fridge. When you top-crop, you're capturing extremely healthy yeast at the height of their activity. If you're just going to seal them in a jar and put them to sleep, you might as well just wait and wash the yeast cake instead.
Agreed, but even if I'm not repitching immediately, I find top-cropping far easier than washing yeast.
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