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OfflineBaby_Hitler
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Cultivating yeast cultures.
    #2165734 - 12/07/03 03:15 AM (13 years, 3 days ago)

I'm getting into home brewing. Yeast comes in two types, dry, and liquid. Liquid is a pure culture, and is more expensive than dry.

I'm thinking about keeping a mother culture, and expanding it so that I only have to buy one packet of yeast per type for a very long time.

How would I go about doing that?

How far do you think I could stretch a packet made for a five gallon batch?


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Offlinefalcon
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2166663 - 12/07/03 04:07 PM (13 years, 2 days ago)

How far do you think I could stretch a packet made for a five gallon batch?

Probably 3 or 4 times, put your yeast packet in the refigerater after you open it should be good for a couple of months.

Not sure but I think keeping your own mother culture going needs to be done on sterile media and technique on agar slants, otherwise you end up with competing organisms.


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OfflineAnnoA
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Re: Cultivating yeast cultures. [Re: Baby_Hitler] * 1
    #2166695 - 12/07/03 04:18 PM (13 years, 2 days ago)



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OfflineBaby_Hitler
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Re: Cultivating yeast cultures. [Re: Anno]
    #2166830 - 12/07/03 05:21 PM (13 years, 2 days ago)

THat's a very nice link. Thanks Anno.

I hope peroxide techniques work for yeasts.


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Offlinethe man
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2167047 - 12/07/03 06:57 PM (13 years, 2 days ago)

what the? i made a post before teh change. then it was here for awhile then disappeared. nuts


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OfflineSuby
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2193961 - 12/21/03 04:09 PM (12 years, 11 months ago)

Quote:

Baby_Hitler said:

I'm thinking about keeping a mother culture, and expanding it so that I only have to buy one packet of yeast per type for a very long time.

How would I go about doing that?

How far do you think I could stretch a packet made for a five gallon batch? 




personally I like the liquid culture yeasts better than the dry. because the yeast have been more fresh than dry packages. http://www.wyeastlab.com/ is a great resource. that's all I use anymore for my homebrews. you want a strain you can brew lots of different beers with. #1056 is a brewery standard.

I use to make "starters" by mixing up some DME for 2-3 12 or 16 oz bottles. about 1.040 Original Gravity. let cool(80f) then "pitch" the yeast into that. let ferment 'till full krotzen (8-12 hr) then pitch into whatever beer I've been making.  oh, put an air lock on the bottle not a cap...messy.
you could always keep the starter in the frig for a few weeks, then use that culture to make more starters.
making new starters I've done that up to 6 generations with out trouble.

the problem when you keep reusing the spent yeast at the bottom is, your pulling in old, dead yeast. and that makes for funny tasting beer.

also, another trick is to brew two batches back to back.
when you rack your beer from the primary fermenter to the secondary, have another batch ready made that day and just use the yeast from the first brew.  but the beers should be similar. not an IPA over a Stout. that would be funny.  I've done that alot with out problems. I think by the third batch  the yeast would need to be washed.

there are ways to "wash" the yeast after a few generations using mild bleach solution and water. basicaly removing the old spent yeast and killing any bacteria.
never did that, but read it sometime ago.

get charlie papazian's book.
hope all my rambling helps somewhat.
:nut:


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"Why don't they make the whole plane out of that black box stuff."
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Some say the glass is half empty, some say the glass is half full, I say, are you going to drink that?

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InvisibleA3eyedfish
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2198792 - 12/24/03 01:00 AM (12 years, 11 months ago)

I used to home brew alot, it was my introduction to mycology, if i remember correctly you could even resurect a yeast culture from the bottom of an unfiltered beer, just give it malt liquid substrate, in a bottle with a bubbler in a cork.


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OfflineBaby_Hitler
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Re: Cultivating yeast cultures. [Re: A3eyedfish]
    #2200812 - 12/25/03 12:11 PM (12 years, 11 months ago)

Yeh, I read about that.

Some beermakers bottle their beers with a different yeast that what it is brewed with, partly just to hinder yeast piracy.


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InvisiblePinhead
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2201067 - 12/25/03 05:15 PM (12 years, 11 months ago)

I make my own brew too ocassionaly. To me I really don't see whats to be gained by growing your own yeast cultures.I've got a supply shop close by,the yeast I use is cheap. Might be fun to try,but then again it could be expensive if I ruin a batch with infected yeast.


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OfflineBaby_Hitler
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Re: Cultivating yeast cultures. [Re: Pinhead]
    #2201168 - 12/25/03 07:11 PM (12 years, 11 months ago)

I would only do it with an expensive liquid yeast.

P. S. I like to fuck with shit.


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InvisibleMilletV
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2205619 - 12/28/03 02:00 PM (12 years, 11 months ago)

The liquid wyeast cultures are great! I particularly like their hefeweizen yeast.

You can culture yeast from most mycobrew bottles if there is a layer of sediment, just pour off the beer and bump the sediment into a yeast starter. These are generally bottle conditioned beers.


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OfflineSuby
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2205942 - 12/28/03 05:51 PM (12 years, 11 months ago)

Quote:

Baby_Hitler said:

Some beermakers bottle their beers with a different yeast that what it is brewed with, partly just to hinder yeast piracy.




that's interesting, probably with some of the pricey beliguims.

One cool thing about where I live is, there's alot of HQ Microbreweries around. I've gotten one brewmaster to give me a quart of some yeast slurry. basically he said they've used #1056 (american ale) as did most micros.


--------------------
"Why don't they make the whole plane out of that black box stuff."
Steven Wright.

Some say the glass is half empty, some say the glass is half full, I say, are you going to drink that?

"I'm desperately trying to figure out why kamikaze pilots wore helmets."


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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2854387 - 07/03/04 05:55 PM (12 years, 5 months ago)

Peroxide tek will work find for yeasts, they produce catalse too. In fact if you por peroxide on yeast it will produce oxygen!


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Offlineblackmold
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Re: Cultivating yeast cultures. [Re: Baby_Hitler]
    #2889687 - 07/14/04 02:54 PM (12 years, 4 months ago)

When I grew yeast I was using it to make ginger beer. To make wild yeast you will need the following:

Mason jar.
Cork for jar with hole in center for air trap.
Air trap.
Cheesecloth or gauze.
2 cups water. @ 80 deg F.
2 teaspoons lemon juice fresh squeezed.
2 teaspoons of raw sugar or torbonado sugar.
Wild yeast. I found grapes easiest as starter; 4 grapes if dried, 2 if fresh.
Mix the 2 cups 80 Deg F water, sugar, and lemon juice. Stir until sugar is dissolved.
Add grapes; put cork and air stop on jar.
Add 2 teaspoons of raw sugar each day for up to 14 days.
When done, stir to mix up yeast. Pour some of the liquid from jar onto gauze or cheesecloth before yeast settles. Then let this dry. This will be your starter next time.

NOTES

You can get a cork and air trap at any beer and wine making supply house. I made my own center hole; rubber cork OK.
Organic wild yeast starter is best; like I said, I prefer grapes. You just use a spoon to get it out of the jar. I?ve also used plum skin. The whitish coating on plum and darker grapes is wild yeast. It?s hard to see on green grapes. Any thin skin fruits should have yeast on them.
You can keep track of yeast growth by the gas going through the air trap. Fresh sugar makes it bubble fast. It barely bubbles when sugar is low or nearly used up. You must feed it every day.
Wild yeast will have a wide range of taste. It took 4 batches for me to get a really good tasting yeast. All worked fine, just different tastes.
Save gauzes until you get a good batch that you like, and use that one for your starter.


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