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Old 02-09-2011, 01:27 AM   #1
schia
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Default Harvesting yeast - how to?

Hello Brew Gurus,

I have a wheat beer brewing at the moment using danstar munich yeast and I’ve been reading about yeast harvest. If it is indeed what I think it is, here are some questions I have to help me save some dollars.

1. Can I harvest the sediment from the bottom of my primary fermenting bucket? If yes, how much should I take out? Should I give it a good stir before doing so?
2. Can I keep it in the freezer and use it again in the next say 12 months?
3. The only benefit I see about harvesting yeast is to save some money but how about taste and such? Does it improve the next brew?

Thanks guys for reading and replying to this thread.

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Old 02-09-2011, 01:35 AM   #2
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got it

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

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Old 02-09-2011, 01:50 AM   #3
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I've been re-using my yeast for the last few batches. I'm not sure if I'm doing this 'correctly' or not, but so far it's worked out well. Here's what i've been doing:

1. brew beer
2. when I rack off the beer, i get as much as possible off, then stir it all up and dump it into a one-liter bottle.
3. I then fill up the rest of the bottle with clean (sanitary) water, shake it up, and let it set in the refrigerator for a few minutes.
4. after a few minutes there will be a cloudy liquid (yeast suspended in water) on top of some dark sediment (trub). I pour the liquid into another bottle, leaving the dark stuff behind.
5. The second bottle now contains rinsed yeast. I keep this stored in the fridge until i need it. After a couple of weeks in the fridge I either use it to make a starter or feed it some wort and let it sit for awhile.

From what I understand you can store yeast in the freezer, but it needs to be in a 10 percent (I think) glycerin solution. If you put the yeast in the freezer with just water/beer/nothing around it, the yeast will die.

Hope this helps.

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Old 02-09-2011, 01:51 AM   #4
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never mind...

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Old 02-09-2011, 05:28 AM   #5
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I wouldn't re-use dry yeast. You aren't saving much. Much more hassle than what it's worth. If you use liquid yeast, it is worth it to re-use.

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Old 02-09-2011, 06:02 AM   #6
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I just reused yeast for the first time this past weekend. I have been doing a simple Canadian style brew and it has turned in to my haus ale. Anyway, I did a ten gallon batch with two different yeasts in five gallon buckets. I didn't remember what was what so I guess I will find out when they get poured. Anyway, I had eight mason jars (don't need that many), racked, swirled the trub/yeast and put it in three mason jars. Then the frig overnight. Pour off the top (beer) and the white is yeast and Voila! you will have bubbles!

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Old 02-09-2011, 02:29 PM   #7
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Quote:
Originally Posted by ruffdeezy View Post
I wouldn't re-use dry yeast. You aren't saving much. Much more hassle than what it's worth.
Really? Wow. My LHBS sells dry Safale yeasts for $4. I've done my last 11 batches with reused S04 and US05 and have 7 more pint jars in the frig for future use and 2 batches fermenting which I will pull off 8 more pints each. So if my math is correct that will be at minimum 34*4=$136. That buys me 4 sacks of grain, a bunch of specialty grains, or pounds of hops. Seems worth it to me.
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Old 02-09-2011, 03:37 PM   #8
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Haven't bought yeast since july, roughly 14 batches off of one smack pack and got 4 more mason jars left and only on the third generation

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Old 02-09-2011, 04:20 PM   #9
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Quote:
Originally Posted by wolverinebrewer View Post
Really? Wow. My LHBS sells dry Safale yeasts for $4. I've done my last 11 batches with reused S04 and US05 and have 7 more pint jars in the frig for future use and 2 batches fermenting which I will pull off 8 more pints each. So if my math is correct that will be at minimum 34*4=$136. That buys me 4 sacks of grain, a bunch of specialty grains, or pounds of hops. Seems worth it to me.
I agree. My LHBS sells Safale for about $3.75. While it's not $7 for the smack packs and vials, I still wash it because I've found washing to be pretty easy and I use US05 a lot.
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