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Old 01-13-2012, 04:29 PM   #1
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Default Best way to activate yeast?

So in biology one of the fundamental concepts is that those most suited to their environment pass their genes with greater incidence than those who are less well adapt. Now I was wondering if you guys think it's better to activate yeast in warm water and add to room temp wort, or if adding to a warm wort after a boil would work just as well.

On the one hand, the activate before pitching to room temp wort method might 'shock' the culture a bit because of the abrupt temperature change. On the other hand, if you pitch to a warm wort, individuals who can't tolerate the higher temperature will die, and once the wort cools, the only remaining individuals might be those adept to survive in high temperatures, and would be less productive once the wort cools.

Obviously both methods will work. I'm just wondering what you might think would typically result in the fastest fermentation.

Let's assume 'warm' to mean 120F as an absolute maximum. Or about 5 degree over the recommended activation temperature for many yeasts.


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Old 01-13-2012, 05:55 PM   #2
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What type of yeast? I couldn't imagine pitching any yeast at 120F. If you are using liquid you should consider a starter. If you use liquid without a starter you should try to cool wort to your fermentation temp and then pitch. Same with a starter.

I don't use dry yeast much but when I do I just pitch it dry into the wort when the wort is at fermentation temp for that yeast. I never have had a poor fermentation by doing this.
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Old 01-14-2012, 02:52 PM   #3
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My understanding is that typical activation temps are 80-115F.
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Old 01-14-2012, 03:59 PM   #4
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In such matters it pays to follow the advice of the manufacturer. He has done the reasoning you are doing and has verified by experiment that whatever method of rehydration he recommends is best for his product.
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Old 01-21-2012, 09:11 PM   #5
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Quote:
Originally Posted by ajdelange View Post
In such matters it pays to follow the advice of the manufacturer. He has done the reasoning you are doing and has verified by experiment that whatever method of rehydration he recommends is best for his product.
Lager Yeasts by WhiteLabs v T-58 for example, 2 entirely different animals...

Go to the manufacturers web-site and select your product


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