Is harvesting and washing yeast really worth the effort?

Discussion in 'General Brewing Discussions' started by Christopher Brown, Mar 2, 2019.

  1. soccerdad

    soccerdad Well-Known Member

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    I try to brew beers in succession. Wet or dry yeast. So if the yeast is 029 Kolsch, I might make Kolsch, Alt, and Kolsch again. Likewise, if I use 34/70 in a Pilsner, I might also use it in a Common, and then in a lager. I tend to get three uses out of any yeast. Unless I don't.
     
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  2. Hawkbox

    Hawkbox Well-Known Member

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    I'm bad for using a different yeast almost every time. I have 6 different ones I think in the fridge right now and instead of using the same one a few times in a row I'll often put it back in and pull something else out to use.
     
  3. Christopher Brown

    Christopher Brown New Member

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    I’m planning on using the same type of yeast for my next two batches. I have a brand new Wyeast smack pack. My plan was to make a starter and then split up the starter into 2 mason jars. 1 I’ll use the weekend and the other next weekend. Would this be correct?

    Blonde ale 5 gallons - 1.053
    Needs 186 billion cells

    SESH- 1.047
    Needs 33 billion cells

    114 gram starter with 1 liter
    Makes 260 billion cells


    Pitch 860 mL to Blonde
    Save the rest for SESH in an airtight mason jar
     
  4. Meatwad

    Meatwad Member

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    #24 Meatwad, Mar 7, 2019
    Last edited: Mar 7, 2019
    I'll assume 0.75M cells/ml, which is what you posted for your first beer's pitch rates.

    Your SESH beer needs 166B cells, not 33B.

    2L starter @ 1.037 OG = 202g DME

    In the blonde you would pitch 1.126L of starter.

    In the SESH you would pitch 874 ml of starter (remainder of starter).

    This assumes you overbuild your Blonde starter by 166B cells @ 0.75M cells/ml in order to have enough cells for your SESH.

    I would do your starter, split the SESH portion into a jar (874 ml), crash the flask and the harvested portion. Decant both prior to pitching and pitch a small slurry rather than the large starter amount.

    If you want to harvest yeast from starters, use this calculator: http://www.brewunited.com/yeast_calculator.php
     
  5. I_playdrums

    I_playdrums Well-Known Member

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    Nope. Just harvest off the starter.
     
  6. Craigerrr

    Craigerrr Well-Known Member

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    Have been doing some research, going to harvest yeast from the batch I have in the fermenter.
     
  7. I_playdrums

    I_playdrums Well-Known Member

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    Sounds great Craig. Let's see the finished product.
     
  8. Craigerrr

    Craigerrr Well-Known Member

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    I will take pictures and put up a thread on this.
     
  9. skyblue67

    skyblue67 New Member

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    Does dry hopping cause any problems. I just stick pellets straight into the fermenter so there's a lot of hop material in the trub. Can I just store this in a sanitised jar and repitch? How long will it keep in the fridge? How much trub to pitch per batch (I usually brew approx 20lt)?
     
  10. Mase

    Mase Well-Known Member

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    Others can chime in, as I don’t store yeast, but why not just grow a large starter for the next brew?
     
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  11. Craigerrr

    Craigerrr Well-Known Member

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    I have been watching yeast harvesting videos. Most of the hop material should settle out with the trub. I just added the dry hop addition to my NEIPA that I will be harvesting yeast from. I will take lots of pictures and post links the videos that helped me understand the process.
     
  12. Hawkbox

    Hawkbox Well-Known Member

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    You can still use it, you just end up with more hop matter in the yeast slurry. Harvesting off the starter is my preferred method to not have to worry about hops. It isn't the end of the world either way.
     
  13. Trialben

    Trialben Well-Known Member

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    So just put down a lager yesterday I'm going to try your slurry collection method a go. I've done this before for a beer or two but discontinued as I had a slight off flavour after a batch or two.
     

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