Is this my Yeast?

Discussion in 'General Brewing Discussions' started by Craigerrr, Apr 21, 2020.

  1. Craigerrr

    Craigerrr Well-Known Member

    Joined:
    Mar 14, 2018
    Messages:
    4,701
    Likes Received:
    6,902
    Trophy Points:
    113
    Harvested yeast from my last brew a couple days ago, has been in the fridge for a little more than a couple days.
    The brew was a hazy one, so the beer on top is hazy.
    Is the layer between my two marks my harvested yeast?
    In the second picture, jar on the left, is that almost pure yeast at the bottom.
    Annotation 2020-04-21 145848.jpg
    20200421_145134.jpg
     
  2. Nosybear

    Nosybear Well-Known Member

    Joined:
    Jul 16, 2012
    Messages:
    9,394
    Likes Received:
    6,634
    Trophy Points:
    113
    Location:
    Aurora, CO, USA
    Looks like it to me.
     
    Vesparados likes this.
  3. Craigerrr

    Craigerrr Well-Known Member

    Joined:
    Mar 14, 2018
    Messages:
    4,701
    Likes Received:
    6,902
    Trophy Points:
    113
    Woot!
    I think the jar on the left may be pretty much pure slurry.
    I filled a gallon jug, let it settle, then decanted to the two jars.
     
    Trialben likes this.
  4. Hawkbox

    Hawkbox Well-Known Member

    Joined:
    Jul 27, 2017
    Messages:
    3,740
    Likes Received:
    2,974
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    IT Manager
    Location:
    Edmonton
    Looks like yeast to me.
    [​IMG]
     
  5. Herm_brews

    Herm_brews Well-Known Member

    Joined:
    Feb 25, 2019
    Messages:
    665
    Likes Received:
    1,984
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Window glass and screen tech
    Ooh, I think that looks good, but I can’t be sure since I’ve never harvested yeast before. I currently have a batch of IPA in primary fermenters, and I want to try harvesting yeast from that batch. In the coming days, I will bottle my batch, then attempt to harvest and wash yeast from the leftover slurry at the bottom of the fermenters. The yeast used in Safale US-05 which is readily available, but I want to try the harvesting. image.jpg
     
    Trialben and Vesparados like this.
  6. Vesparados

    Vesparados Well-Known Member

    Joined:
    Mar 7, 2018
    Messages:
    132
    Likes Received:
    306
    Trophy Points:
    63
    Gender:
    Male
    Occupation:
    Chemist
    Location:
    Mableton, GA 30126, US
    I have harvested yeast for a year and never been brave enough to try it on a batch. Maybe tomorrow, No Guts, No Air Medal.
     
    Herm_brews likes this.
  7. thunderwagn

    thunderwagn Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    3,741
    Likes Received:
    7,278
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Loveland, CO
    Is that the kveik? If so, you'll never have to purchase that strain again lol. I pitched less than a tablespoon my latest batch and came up with about a quart of solid yeast after fermentation. It's insane.
     
    Trialben, Vesparados and Herm_brews like this.
  8. Vallka

    Vallka Well-Known Member

    Joined:
    Jun 13, 2017
    Messages:
    662
    Likes Received:
    864
    Trophy Points:
    93
    Gender:
    Male
    Location:
    Squamish Canada
    Yes that top layer is yeast, just do a YouTube search on washing yeast and your off :)
     
    Group W, Herm_brews and Vesparados like this.
  9. HighVoltageMan!

    HighVoltageMan! Well-Known Member

    Joined:
    Feb 2, 2015
    Messages:
    833
    Likes Received:
    810
    Trophy Points:
    93
    Location:
    Big Lake MN
    It looks like to me that your yeast isn't very flocculant. If you use harvested yeast before it floc's out, the yeast on the bottom is the most flocculant yeast from the strain your using. The yeast in suspension is still viable and may be the healthiest, dead yeast drops fairly quickly and has a grayish color. Live yeast has a tannish pink color.

    If you don't wait for most of the yeast to drop out, you will end up pitching less flocculant yeast and it will be different from the original beer, plus it may have less attenuation because the yeast drops out too quickly. Yeast strains aren't "pure" per se. They are closely related genetically and as the yeast gets re-pitched, it "drifts" as the overall genetic make up changes slightly with every fermentation. The more the yeast is re-used, the further it gets from the original yeast bank pitch. The pitches you receive from Wyeast, White Labs, etc. are built up from yeast cells that have single genetic source. Even with asexual reproduction, they change genetically over the generations.

    On top of that you have proteins, trub, hop residue, starches and even small amounts of bacteria mixed in with the yeast (all this stuff changes it's color), so it's sometimes hard to know just how much yeast you have without a hemocytometer. Sometimes you just need to run with it, re-pitch it and see what happens. It's the best way to learn.

    Brew on!
     
  10. Hawkbox

    Hawkbox Well-Known Member

    Joined:
    Jul 27, 2017
    Messages:
    3,740
    Likes Received:
    2,974
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    IT Manager
    Location:
    Edmonton
    I'd just put that jar in the fridge and leave it. I harvest off my starters rather than after fermentation so it doesn't need to be washed or anything.
     
  11. Craigerrr

    Craigerrr Well-Known Member

    Joined:
    Mar 14, 2018
    Messages:
    4,701
    Likes Received:
    6,902
    Trophy Points:
    113
    Thanks for all of the great input.
     
  12. Trialben

    Trialben Well-Known Member

    Joined:
    Mar 30, 2016
    Messages:
    9,437
    Likes Received:
    9,502
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Pest control tech
    Location:
    Palmwoods QLD
    Looks good Craig and a lot cleaner then my yeast harvesting I tend to get a load of trub in along with yeast. Thunderwagon is on the money you only need a teaspoon or two and thats a standard pitch for kviek.
    You'll get a better flavour profile I've found pitching low. I'm on gen 7 ish on my voss kviek yeast I got more than a year ago.
    Most kviek arnt pure single isolate yeast strains and being farmhouse style yeast handed down over hundreds if not thousand years are a perfect yeast to just keep on culturing along into a Craig specific kviek yeast strain:).
     
  13. Frankenbrewer

    Frankenbrewer Well-Known Member

    Joined:
    Jul 19, 2019
    Messages:
    458
    Likes Received:
    690
    Trophy Points:
    93
    Location:
    Connecticut
    Question: Does it matter the size of the mason jars that you keep the washed yeast? I want to try this but don't want to buy new jars. I have the pint size ones for making lemoncello. Should I just buy more jars?
     
  14. thunderwagn

    thunderwagn Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    3,741
    Likes Received:
    7,278
    Trophy Points:
    113
    Gender:
    Male
    Location:
    Loveland, CO
    Pint size is just fine. I prefer pint and even the smaller 8oz jars.
     
  15. Mark Farrall

    Mark Farrall Well-Known Member

    Joined:
    Oct 19, 2017
    Messages:
    1,302
    Likes Received:
    1,423
    Trophy Points:
    113
    Location:
    Melbourne Australia
    Yep, bigger than your size is a waste as you'll hardly ever need to pitch more than that.
     
    thunderwagn likes this.
  16. Hawkbox

    Hawkbox Well-Known Member

    Joined:
    Jul 27, 2017
    Messages:
    3,740
    Likes Received:
    2,974
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    IT Manager
    Location:
    Edmonton
    I use 500ml jars cause they're easy to get locally.
     
    thunderwagn likes this.
  17. Craigerrr

    Craigerrr Well-Known Member

    Joined:
    Mar 14, 2018
    Messages:
    4,701
    Likes Received:
    6,902
    Trophy Points:
    113
    Thanks Ben
    I do like to take things and make them my own :D
     
    Trialben likes this.
  18. Herm_brews

    Herm_brews Well-Known Member

    Joined:
    Feb 25, 2019
    Messages:
    665
    Likes Received:
    1,984
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Window glass and screen tech
    Yay, the yeast harvested from my previous brew is now busy working on yesterday’s brew. Both fermenters are burping away!
     
  19. Craigerrr

    Craigerrr Well-Known Member

    Joined:
    Mar 14, 2018
    Messages:
    4,701
    Likes Received:
    6,902
    Trophy Points:
    113
    Cool, same here!
    Made a 2 liter starter from one of those jars then pitched into 10 gallons Tuesday.
    It is almost done! VOSS works real fast.
    Going to leave it alone for another 4-5 days before cold crashing thugh.
     
    Herm_brews likes this.
  20. Herm_brews

    Herm_brews Well-Known Member

    Joined:
    Feb 25, 2019
    Messages:
    665
    Likes Received:
    1,984
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Window glass and screen tech
    I did not build a starter, just pitched swirled rinsed slurry straight into the fermenters, then crossed my fingers, tossed a pinch of salt over my shoulder, rubbed the lucky rabbit’s foot, did a magic dance ......... and waited. The slightest bit of activity was evident after 6 hours. Then this morning it was bubbling away.
     

Share This Page

arrow_white