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Old 05-05-2013, 12:52 AM   #11
masskrug
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Originally Posted by Chromebrew View Post
I know this is against the grain here, but I pitch dry yeast directly into the wort and I've never had a single problem. US-05 usually takes off for me within 24 hours from dry. I know its easy to do and I know there is some benefit to it, but from my experience, I end up with great fermentations and I don't feel the need to change it up.
I've done both and have not seen any difference. Save yourself some time and pitch it dry on some well aerated wort.
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Old 05-05-2013, 01:44 AM   #12
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Originally Posted by masskrug View Post
I've done both and have not seen any difference. Save yourself some time and pitch it dry on some well aerated wort.
^^^ This. Experimented with dry vs rehydrating on a commercial scale and came to the conclusion that there was no appreciable difference. Since it is a) an extra step and, therefore, b) another potential source of contamination, I simply don't bother with rehydrating.

It is true that a large number of cells won't survive the pitch, BUT the ones that do survive feast on the weak... so to speak. I pitch 1 pack into 5 gallons and typically see signs of fermentation in around 8 hours. No problems.

Also, dry yeast includes sufficient lipids for growth so that aeration is not actually necessary... I aerate anyway, but don't get extreme.. just let the wort splash and churn as I pour it into my ferm...
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Old 05-05-2013, 01:49 AM   #13
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I never rehydrate anymore.

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Old 06-11-2016, 02:53 AM   #14
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Seems I've been seeing people suggesting rehydrating dry yeast here and there lately. I just started brewing a few years ago, but everyone I talked to always said to pitch it dry. I know to rehydrate for bread baking, but that's basically to make sure it's alive and healthy. With beer yeast, you can check the date on the package and avoid anything too old. Generally those packets are designed for 5 gallon batches, right? The OP didn't specify batch size, but I think we're all assuming the 5 gallon range. I've never needed more than one packet, dry. If all you can find is some yeast with a little age on it, you could pitch two. Or, if you're adventurous and get some equipment, you could rehydrate one packet and make a starter!
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Old 06-11-2016, 02:59 AM   #15
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I always rehydrate as it just seems to take off faster and ferment faster. I use an O2 wand to aerate which is key especially if you drop it dry but I made a blonde yesterday and was out of pure 02 so I rehydrated 05 which is a notoriously slow starter and fermentation has kicked off I n less than 24 hrs. Not sure if that's from rehydrating or not but I'll always do it. Jmo
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Old 06-11-2016, 03:26 AM   #16
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No.



Okay, bye.
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Old 06-11-2016, 03:32 AM   #17
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The only true answer is, it depends....

LOL

 
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Old 06-11-2016, 03:39 AM   #18
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I have always been surprised to look at some of the dry yeast packets and see directions to just sprinkle it on the wort. Then if you go digging on the lab's website or look for videos you will find advice from them to rehydrate the yeast.

Many say that sprinkling the yeast on the wort will kill as much as half of the cells. Does anyone have a link to a study proving this?

 
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Old 06-11-2016, 03:52 AM   #19
day_trippr
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iirc, Chris White in Yeast covered this.

The pdfs on the Fermentis web site recommend hydration before simply sprinkling.
Between that and the reported high mortality incurred by sprinkling, I've always hydrated - I don't even have a "sprinkling baseline" to compare against...

Cheers!

 
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Old 06-11-2016, 04:18 AM   #20
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Quote:
Originally Posted by kh54s10 View Post
I have always been surprised to look at some of the dry yeast packets and see directions to just sprinkle it on the wort. Then if you go digging on the lab's website or look for videos you will find advice from them to rehydrate the yeast.

Many say that sprinkling the yeast on the wort will kill as much as half of the cells. Does anyone have a link to a study proving this?
http://seanterrill.com/2011/04/01/dry-yeast-viability/

http://seanterrill.com/2011/07/29/dr...lity-take-two/

This kind of supports @masskrug though

http://brulosophy.com/2014/09/15/spr...iment-results/

 
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