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General Category => Yeast and Fermentation => Topic started by: jaftak22 on September 14, 2013, 07:23:25 PM

Title: Harvesting yeast
Post by: jaftak22 on September 14, 2013, 07:23:25 PM
Want to start re using yeast. What I want to know is if I make a brown ale and harvest the yeast, should I only reuse the yeast from that beer for a similar style? Thanks just got into home brewing at the beginning of the year
Title: Re: Harvesting yeast
Post by: denny on September 14, 2013, 08:23:33 PM
Want to start re using yeast. What I want to know is if I make a brown ale and harvest the yeast, should I only reuse the yeast from that beer for a similar style? Thanks just got into home brewing at the beginning of the year

Nope, you can use it for any style where that's an appropriate yeast.  For example, you could use the yeast from the brown to make a pale ale.
Title: Re: Harvesting yeast
Post by: klickitat jim on September 14, 2013, 08:25:42 PM
I think you're good to go reusing for any beer that the yeast variety is good in. My only personal precaution is to not reuse from high gravity. Obviously if you had an infected batch you wouldn't reuse too.
Title: Re: Harvesting yeast
Post by: greatplainsbrewer on September 14, 2013, 08:47:31 PM
Maybe just oversize your starter and harvest from that
Title: Re: Harvesting yeast
Post by: erockrph on September 14, 2013, 08:59:39 PM
In general, you should not have a problem going from one style to another when repitching. I have never tried it myself, but it has been suggested that if you go from a very dark/roasty beer to a very light one (i.e., a stout to a blonde) you might notice some carryover. I think a brown ale should be fine going to just about any style.
Title: Re: Harvesting yeast
Post by: reverseapachemaster on September 15, 2013, 05:45:29 PM
If you are concerned about carryover you can wash the yeast to separate the yeast from the other trub material. I've never had a problem reusing yeast that way.
Title: Re: Harvesting yeast
Post by: Joe Sr. on September 16, 2013, 01:53:46 PM
I typically build a starter from my harvested yeast, so I don't worry too much about what beer it came from previously.
Title: Re: Harvesting yeast
Post by: klickitat jim on September 16, 2013, 09:02:56 PM
You also start with fresh new babies that way.
Title: Re: Harvesting yeast
Post by: thebigbaker on September 16, 2013, 10:09:06 PM
Maybe just oversize your starter and harvest from that

+1!  I make a starter 500ml larger than the size starter I need.  If I need a 2L starter, I'll make a 2.5L starter and pour all but 500ml.  Set that extra 500ml in the fridge to let settle.  Take a mason jar with 1/4 - 1/2 filled w/ water and microwave for 2 minutes to sanitize the water and jar.  Put a sanitized lid on the jar and let cool in the fridge.   Then take the extra starter, pour out most of the liquid and leave just enough to mix up the yeast on the bottom and pour into the mason jar and put into the fridge.  Next time I need the yeast, I make another starter and make it 500ml more and repeat the process.  Clean yeast every time and much easier than washing yeast from a carboy.
Title: Re: Harvesting yeast
Post by: morticaixavier on September 16, 2013, 10:29:32 PM
Maybe just oversize your starter and harvest from that

+1!  I make a starter 500ml larger than the size starter I need.  If I need a 2L starter, I'll make a 2.5L starter and pour all but 500ml.  Set that extra 500ml in the fridge to let settle.  Take a mason jar with 1/4 - 1/2 filled w/ water and microwave for 2 minutes to sanitize the water and jar.  Put a sanitized lid on the jar and let cool in the fridge.   Then take the extra starter, pour out most of the liquid and leave just enough to mix up the yeast on the bottom and pour into the mason jar and put into the fridge.  Next time I need the yeast, I make another starter and make it 500ml more and repeat the process.  Clean yeast every time and much easier than washing yeast from a carboy.

Take it one step further and make one big (5 liter?) starter when you get some new yeast. decant and pitch an appropriate volume of slurry and save the rest as you describe, now make a starter from a dollop of that each time you need one and you've got a clean 1st generation population to propagate from.
Title: Re: Harvesting yeast
Post by: cornershot on September 16, 2013, 11:20:34 PM
I find it just as labor intensive to make a starter as it is to harvest from the bottom of the carboy. Top cropping ales is rather easy and yields nothing but pure, clean, 100% viable yeast.
Title: Re: Harvesting yeast
Post by: klickitat jim on September 17, 2013, 12:06:52 AM
Lately if I brew within a few of kegging I just reuse. Otherwise I use 100ml and make a starter. I don't save anything more than a couple weeks, though I know you can.
Title: Re: Harvesting yeast
Post by: clef051 on September 22, 2013, 11:49:19 AM
Be careful going from a smoked beer to a non-smoked beer also.