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jerrylove
little bit further then I was



Registered: 06/19/09
Posts: 602
Loc: shakedown street
Last seen: 1 year, 4 months
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Brewers yeast propagation?
#23429109 - 07/10/16 11:48 AM (7 years, 6 months ago) |
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Could someone link to me or suggest information on propagating yeast for brewing. Trying to helps a friend with a brew house save on the expense of sending off for his preceded strains. Thanks!
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THOSE WHO KNOW DONT TALK! THOSE WHO DONT KNOW CANT TALK. (Timothy Leary) "Funny thing about weekends when your unemployed they don't mean quit so much except you get hang out with your workin' friends" Les Claypool
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rubberlizard
Brewer and hobbymycologist


Registered: 10/26/10
Posts: 388
Loc: Probably my brewery
Last seen: 2 years, 7 months
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Re: Brewers yeast propagation? [Re: jerrylove]
#23887231 - 12/02/16 11:10 AM (7 years, 1 month ago) |
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Its not that hard, mix boiled wort with a gravity of 1030 to 1040 and yeast, and Bobs you uncle. Similar to making a yeast starter.
Hard to go into alot more detail without know some more about the brewhouse. What type of beer? ale, lager? How large are the batches? How long is the yeast stored between brews? and so on
Try reading Yeast: The Practical Guide to Beer Fermentation by Jamil Zainasheff and Chris White or Technology Brewing and Malting by Wolfgang Kunze. Sure you could get your answers there.
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Gr0wer
always improving



Registered: 09/16/03
Posts: 6,056
Loc: El Paso, TX
Last seen: 5 years, 10 months
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Typically brewers use a small vessel like a modified sanke keg to transfer yeast into and use on the next batch. You can reuse yeast as much as 5 or 6 generations before you should start fresh. As mentioned by rubberlizzard you cant do this in certian cituations like high abv brews in particular where the yeast is stressed.
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tim89
Stranger
Registered: 01/15/17
Posts: 5
Last seen: 6 years, 9 months
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Re: Brewers yeast propagation? [Re: Gr0wer] 1
#24122031 - 02/26/17 07:27 PM (6 years, 10 months ago) |
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You can do it different ways. If you have an unfiltered, and un-pasteurized beer, you can save the dregs from the bottom of the bottle. (pour it in a glass to drink), and pour the dregs with the yeast into a flask with some wort made preferably from light dry malt extract. Using honey, table sugar, etc is said to make the yeast lazy and have negative effects. Put a balloon or preferably a rubber stopper and air lock on top. Or, if you recently brewed a batch, there's a layer of live yeast left in the trub you can skim off.
Not all yeast is the same, and they also sometimes use a yeast to ferment and a yeast to carbonate after the main fermentation yeast dies off.
Most cities have a home brew supply store with everything you'll need. White Labs or Wyeast are going to be your best bet, you're looking at like $8, which is actually a good place to spend your money since it has a big impact on the final product. If money is an issue, there's a method called "brew in bag" that a lot of people are doing now.
To save yeast, I'm actually looking into transferring a strain to an agar plate possibly for long term. If we can do the same with mushrooms, it seems we could with brewing yeast too.
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bigbigbilly
Stranger
Registered: 07/05/12
Posts: 127
Last seen: 2 months, 5 days
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Re: Brewers yeast propagation? [Re: tim89]
#24132486 - 03/02/17 10:46 PM (6 years, 10 months ago) |
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Brew in the bag is not only cheaper but SO easy.
Yeah you can transfer to agar, to keep it active all you have to do is re-streak it every few months.
You can keep it going more than 5 or 6 tines,I was talking to the microbiologist at a brewery thus summer and they would do around 14 rounds before ordering new.
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