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-   -   Washed yeast settling below trub? (http://www.homebrewtalk.com/f163/washed-yeast-settling-below-trub-243856/)

joetothemo 05-05-2011 04:36 PM

Washed yeast settling below trub?
 
Sorry, I didn't have a chance to take a pic of this before leaving for work but...I can after work tonight.

I washed come WLP-001 last night. This is the 2nd cultivation for this yeast. Step 2 in an APA/APA/IPA progression.

I've washed yeast 4-5 other times, and every single time, the thick, white creamy yeast (the good stuff) has settled on top of the dark, icky, hop-laden trub in my jars.

Last night, this was not the case.

My jars have the normal 3-bands of matter, but go in the order of (top to bottom):
  • Thin, watery beer
  • Dark, grimy trub
  • White, creamy yeast

I've not seen that to date. What gives?

jescholler 05-06-2011 03:30 AM

That's pretty interesting. The only thing I can think of is that you've selected some very flocculant yeast, and it has settled before most of the trub. That seems pretty difficult though.

By 2nd step, do you mean that this batch fermented 1 or 2 APAs?

Can you think of anything that you've done that would select a more flocculant yeast, maybe racking early?

Either way, it's probably still fine to use.

joetothemo 05-06-2011 04:14 AM

Here are the pics of what I am seeing. This yeast has been through 2 APAs at 1058 and 1056, respectively). Tomorrow, I wanted to use this slurry to ferment a 1060 IPA and be done with it.


As far as extenuating circumstances...All that I can think of is this:

I was very-very careful to keep this yeast cool ... even using a swamp cooler at times.

The fermentation temp was 65f throughout the vigorous phase and it rode out another week or so at 63-64f (12 days total). I took gravity readings over several days to be sure we were done. It didn't budge from 1010 FG all week.

The day I racked to secondary (I needed that bucket and planned on dry hopping in another vessel), the ambient temp jumped up to close to 70f. The beer itself never made it past 68f...but I could see the yeast getting active again in the bucket (occasional stuff shooting up from the bottom to the surface).

Maybe fermentation was kicking up again causing that "special" flocculation?

http://www.homebrewtalk.com/gallery/...m/DSCN1840.JPG
http://www.homebrewtalk.com/gallery/...m/DSCN1841.JPG


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