Tuesday, August 16, 2016

Beer Notes Batch 20 - Bohemian Pilsener (Gregor Pils)

http://www.hoptomology.com/2012/07/25/the-pilsner-urquell-showdown-decoction-vs-single-infusion-was-it-worth-it/
http://www.morebeer.com/products/bohemian-pilsner-grain-beer-kit-advanced.html
http://morebeer.com/brewingtechniques/library/backissues/issue5.3/urquell.html
http://www.hoptomology.com/2012/01/25/pilsner-urquell-decoction-mash-or-single-infusion/
http://brulosophy.com/methods/lager-method/
https://byo.com/mead/item/1497-the-science-of-step-mashing


9.5lb Weyerman Bohemian Pilsner

Pre-boil SG = 1.039, SG = 1.049

Assumed this water profile:
Columbus Water (Hap Cremean Water Plant 2014)
Ca+2     Mg+2    SO4-2   Na+      Cl-          Alkalinity       pH
28       8        59      13       25              45 (HCO3)        7.8
Which means I'll have to dilute with 50% distilled water to approximate
Pilsen water.

Modified triple decoction (According to an article, the water/grain ratio is
0.9qt/lb, which seems too low.  I'll start there then infuse to get to ~ 2qt/lb):
    100F acid rest (and beta glucan activation): 9qt @ 107F, 60 min
    127F protein rest: infuse 9qt @ 160F, 10 min
    143F Saccharification: 20 min
        (Decoct 5qt, 143F for 20 min, 163F for 15 min, boil for 10 min, return)
    163F mashout: 15 min
        (Decoct 7qt, 163F for 15 min, boil for 10 min, return)
   
Batch sparge: 2.5 gal 180F water, followed by 1 gal 180F water.


1.25oz Saaz (First Wort, 2.8% alpha)
1.25oz Saaz (85 min)
1.5oz Saaz (25min)

WLP800 yeast, MFG 11/22/15, Lot 1021551

2/13/2016  6:30pm Made yeast starting wort with 4C water, 1/2C pilsen DME and 1/4t
        Wyeast beer yeast starter.
       7:45pm Pitched WLP800 yeast in starter, put starter in cool part of basement
        where temp is about 62F.
2/14/2016  7:18am Some activity in airlock
       7:12pm Made a much larger, higher gravity starter wort.  Used 2L water
        and 200g Pilsen DME (and a pinch of yeast nutrient.)  Shook until
        the foam filled the fermenter, poured the entire previous starter
        into the fermenter.  Should have waited for the foam to settle,
        some of it came out of the top.  Unfortunately I didn't chill
        the new wort enough, so the final temp was about 80F.  Put
        it in the fermentation fridge to bring the temp down to 70F.
      11:40pm Temp down to 66F, no noticible fermentation activity, but
        but there is a nice layer of bright white yeast on the bottom.
2/15/2016 10:15am Began heating water, used 3gal distilled and 3gal double filtered.
      10:34am Began acid rest.  Stirred in 9 qt 107F water, overshot the
        temp a little so I added an additional 1qt 70F water.  Starting
        temp was 103F.
      10:51am Krausen is forming in yeast starter, but there is no airlock
        activity.  There are billowy drifts of new white yeast on
        the bottom of fermenter.
      11:39am Finished infusing 9qt of 160F water, temp of mash tun was
        128F. Added a little direct heat to get to 131F.
      11:53am began pulling first decoction, 5qt of thick mash
      12:00pm Decoction up to 143F, rest for 20 min.
      12:21pm Heated decoction up to 163F for second rest
      12:35pm Began heating decoction to boiling.
      12:46pm began 10 minute boil
      12:56pm Finished first decoction, added to main mash.  Main mash
        temp went all the way up to 148F.  I'll keep the top off
        and let it cool a little. I heated the main mash up to
        132F, and I shouldn't have done that. I should have left
        it alone and let the decoctions do their things.
      1:05pm Temp down to 146F.
      1:19pm Temp down to 144F, pulled second decoction, about 7qt.
      1:24pm Decoction rest at 163F.
      1:34pm Started bringing decoction to a boil
      1:49pm Decoction boil begins.
      2:00pm Finished second decoction, added to main mash.  Temp
        at 162F
      2:21pm Finished clearing wort, began sparge.  Added 6qt 175F
        water on top of grain bed.
      2:39PM "Paused" sparge to add another 2.5 gal 190F water.
        Brought mash temp up to 169F.
      2:53pm Resumed sparge.
      3:30pm Had other sparge complications; stopped sparge and stirred
        a second time.  Finished sparge, got about 7.25 gal
        wort.  Started propane burner.
      3:34pm Added 1.25 oz Saaz, the first wort hops.
      3:44pm Measured pre-boil OG = 1.039, spot on.  Wort tastes
        nice but is kind of indistinct.  Not nearly as "green"
        as the grains taste, but not as vibrant as a
        British malt like maris otter.  Good, not great.
      3:48pm Boil begins.
      4:24pm Added 1.25oz Saaz.
      5:24pm Added 1.5oz Saaz.
      5:31pm Put chiller in wort, added whirlfloc and
        1/2t wyeast beer yeast nutrient.
      5:46pm Finished boil
      5:57pm Temp down to 100F, added ice to pre chiller.
      6:10pm Temp down to 63F, turned off chiller. I'll let the
        kettle rest for a bit in hopes that the cold break
        settles down to the bottom.  Yeast starter is
        fermenting fairly vigorously (a lot of billowy
        krausen) but not much airlock activity.
      6:38pm Put starter in fridge to get yeast to settle
        so I can decant before pitching.  Began aerating wort.
      7:15pm Finished aerating wort, filled most of the head space
        with foam.  Put fermenter in the fridge to chill.
2/16/2016 1:29am Decanted about half of the starter fluid, pitched
        yeast.  Fermenter was at 50F, will hold at 53F.
        Starter fluid was so amazing.  It had a huge grainy
        flavor, slightly spritzy, big and round.  It was
        very very different from the WLP022, and I might
        have liked it better (though it was in a higher
        gravity starter, so maybe it was just higher in
        alcohol.  There were no off flavors that I noticed,
        I bet it would ferment nicely at 60F.  The beer came out
        with SG=1.055 (at 50F, so subtract a point or two.)
        There was just under 5 gal collected, so I could have
        easily added a little more water.
        It is a very clear bright gold, very pretty.  It tastes
        a little too bitter, hopefully that will mellow a bit.
        It has a nice round grainy flavor that is different
        from the usual british malt grainy flavor I'm used
        to.  I am really excited about it.  I will ferment
        at 53F, right in the middle of the White Labs
        recommended range but a little higher than Pilsner
        Urquell.
      7:01am No noticible activity.
      9:42pm Fermentation is very active now, lots of thick white
        billowy krausen on top.  Airlock activity is quite
        irregular.  There is 1s between bubbles sometimes,
        there is a series of 4-6 bubbles followed by a longer
        pause.  Lots of motion up and down the fermenter.  There
        is a very thick layer of cold break/hop detritus in the
        bottom of the fermenter.  I made a mistake by transferring
        it.  Hopefully it will compact down a little but it
        is about 2" thick right now.
2/17/2016  7:03am Temp 53F, fermentation still very active, some darker
        brown specks seem to have been "sprinkled" on top of the
        thick bright white billowy krausen.
       6:52pm  A lot more of the dark brown speckles are on top of the
        krausen.  The yeast are even more active than yesterday, they
        are carrying bits of hop detritus up with them.
2/18/2016  7:09pm Fermentation is even more vigorous than before, 2s between
        bubbles.
2/19/2016 10:55pm Fermentation is very vigorous
2/20/2016  7:19am Began temperature ramp up.  Temp is 53F, ramp to 58F first.
        4s between bubbles.
       8:29pm Temp is only 56F, ramped thermostat up another 5F to 63F.
        Ambient temp in the fermentation chamber area is only 62F,
        so I will either turn on the warmer or move the fermenter
        to a warmer place in the basement to hit the next temp.
        Airlock activity has increased to 2s between bubbles, but
        yeast don't seem to be moving as vigorously.
2/21/2016  1:03pm Temp of fermenter up to 60F, turned heating pad on to
        increase the temp a little more rapidly.  Airlock is
        bubbling very vigorously, 2s between bubbles.  Fermentation
        is still very active.
      11:16pm Temp up to 62F, moved fermenter to an area of the basement
        where the temp is about 65F.  Krausen looks even thicker
        than before, much darker in color if not taller.
2/22/2016  7:09am Temp up to 64F, 2s between bubbles.  Fermentation is
        still tremendously active.
2/24/2016  7:10am Temp still 64F, 3s between bubbles, fermentation seems
        to have slowed a little, krausen has started to fall a little,
        yeast aren't moving quite as fast as before.
      11:01pm 4s between bubbles, temp up to 65F
2/25/2016  7:07pm Still 4s between bubbles.  Detritus at bottom of fermenter
        has compacted a little.
2/27/2016  7:12pm Fermentation has slowed considerably; 23s between bubbles.
2/28/2016 11:31pm Still some krausen, but 43s between bubbles.  If the
        lagering fridge were available, I'd start lagering now.
2/29/2016 11:52pm 48s between bubbles, still a thin layer of very
        sticky looking krausen on top.   
3/1/2016  8:09pm Krausen is basically gone.
3/2/2016  7:12am Moved fermenter to lagering chamber, did not transfer
        to secondary yet.  Temp is 65F.
      7:28pm temp down to 38F.
3/3/2016  1:25am Temp down to 31F.
3/8/2016  7:15pm Racked beer off of trub and other detritus.  Got 4.75 gallons
        in secondary fermenter.
3/22/2016  9:27pm Bottled today.  Used 2.5oz corn sugar for priming,
        boiled with 16oz water for 15 min.  Got 4.5 gallons
        of beer in bottling bucket, which gave 51 12oz bottles. 
        I didn't let the beer warm before bottling, so it was
        about 46F at bottling.
        FG = 1.012 (at probably 50F, so it could actually be lower.)
        Beer is a bright gold, about the same color as the Altmodisch.
        It is definitely the brightest beer I've made (but, of
        course, it is the first lager i've made.)
        Put beer in warm room with heater at 75F.
        It is tremendously malty with a hint of hop edge (possibly
        too much hop bitterness.)  It will be very good.
3/25/2016  10:00am Turned heater off; I suspect that the warm temps are
        to blame for my overcarbonation issues.
4/5/2016  7:45pm Put test bottle in the fridge
4/6/2016  8:40pm Opened the bottle, it had a very loud "pfft" and I expected
        overcarbonation.  In reality, it had plenty of carbonation
        but not (yet) too much.  Beer poured a deep gold with
        a bright white head.  Beer is much less bright than I
        had hoped, it looks more kolsch than pilsener.  The
        nose is softly fruity, again like a kolsch.  The
        soft fruitiness is up front, followed by a nice
        round grainy maltiness and finishing with a perfect
        peach pit bitterness.  It is an excellent, rich,
        round, balanced beer.  I love it.  It is more like
        a kolsch than pilsener, however, which is a bit
        disappointing.  I should have fermented at cooler
        temps at first, for longer, and lagered longer.
        The head lasts too long and the beer will probably
        be overcarbonated.  Despite these problems, the
        beer finishes quite dry and is very good.
4/28/2016  8:46pm The fruitiness has faded a little and now there
        is a touch of sweetness.  Had a chance to have
        the real thing today (on tap, no less, at BJ's
        brewhouse.)  It was very, very good.  I seem to recall
        having it in a bottle once and not thinking much
        of it, but I really liked it today.  Compared to
        mine, it was a little darker, a little more bitter
        a little less carbonated (almost no head retention,
        while my head lasts forever) and quite a bit cleaner
        (no surprise.)  What was surprising was that it
        seemed to have a touch of fruit, just like mine.
        It was on the border of fruit/flower, so this
        might just be the effect of the tremendous amount
        of hops, but it definitely was not as clean
        as I expected.  Also, I think mine is a little
        bit more "grainy".  In the final analysis, mine
        has a lot more in common with the original
        than I dared to hope.
        surprising