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Mash Efficiency On A Speidel Braumeister

Discussion in 'All Grain Brewing' started by edubrueurope, 17/12/12.

 

  1. edubrueurope

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    Posted 17/12/12
    Having been brewing with a 50l braumeister for a few months using the same recipe i was wondering if anyone could check over the figures...

    Grain payload - 11kg organic lager malt

    Water in - 53 litres

    Sparge - 12 litres

    Wort to fermenter - 53 litres

    Gravity - 16 Plato (i use a brix refractometer)

    mash efficiency - 85% ??

    Pitch 50g yeast.

    The fermentation runs for 10 days down to around 7 Plato and then stops (fermenter is set at between 15 - 16 deg C).

    ABV 5.5% ??

    Hows it looking
     
  2. mikk

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    Posted 17/12/12
    1.065 to 1.028 doesn't sound right, & is only 4.8%. FG should be well under 1.020/5 plato. 53L of 1.065 wort is 99% efficiency, so the figures that you've given appear incorrect.

    12L is a big-ish sparge too- might cause some astringency in a pale lager if you're not careful.

    What yeast are you using? 15-16 deg is high for a lager & low for an ale.

    How does it taste? That's the best way to judge a beer...
     
  3. tiprya

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    Posted 17/12/12
    I get 86% mash efficiency every brew with my 20L. 23L mash 8L sparge.
     
  4. mxd

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    Posted 17/12/12
    a little more info, what are you making

    Grist
    yeast
    mash profile
     
  5. adryargument

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    Posted 17/12/12
    Are you making sure that you then convert the brix to the appropriate SG/account for the alcohol?

    i.e. My beers used to finish around the 1.023 area when using the refractometer due to the alcohol % - however when using a hydrometer it would show 1.010.
     
  6. evildrakey

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    Posted 17/12/12

    Can you explain that a bit better - I've been using my refactometer for start and end gravity readings - and yeah, I thought my jump in FG was something I was doing wrong whilst mashing...
     
  7. stux

    Hacienda Brewhaus

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    Posted 17/12/12
    You need to use a chart/table/calculator to compensate for alcohol in the reading. You supply the calculator with be OG and FG(P) and it converts it to a real reading
     
  8. evildrakey

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    Posted 17/12/12
    Is there such a beast in Beersmith 2 or do i have to look elsewhere?

    Oh and Stux... You're always answering my questions... You're stalking me aren't you...
    Or is it beer-fueled man-love???
     
  9. mxd

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    Posted 17/12/12

    there is under tools refactomer I think, you enter fermeting ?? then you SG then your current brix to get a current G.
     
  10. Malted

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    Posted 17/12/12
    I am led to believe that with a Braumeister, 85% efficiency for a mid range gravity brew (say around the 1.050 SG) with a sparge is considered normal. There are quite a few factors that can affect this though; my biggest one is too much flour in the grist seems to decrease my efficiency. As with pretty much any style of amateur brewing (Braumeister's are not excepted), efficiency decreases when you play at high gravity brewing.


    It is not a big sparge for a 50L Braumeister. I believe that BIAB quite often mash at full volume (for a no sparge run), you can't do that with a Braumeister as the top of the malt pipe should not be under water/wort. With a Braumeister you have to either, sparge to account for your losses, or accept a smaller output volume. Having said that I'm sceptical of the volumes the OP has quoted.

    Here is how it might go:

    Mash in 53L.
    12L sparge. He has 11Kg of grain so you would expect about 11L loss to grain (absorbed by the grain).

    Now we have 54L pre boil.
    We might lose 10% to the 60 minute boil (54L -5.4L).

    Now we have 48.6L post boil.
    We might even lose 4% to cooling (the cool wort takes up less space than the hot wort. 48.6L - 1.94L).

    Now we have 46.66L of cooled wort. How much are we going to lose to kettle trub before it goes to the fermenter? Let's say about 2L.

    Now we have 44.66L of wort into the fermenter, not 53L. If he got 43L into the fermenter, I'd find that plausible. To get 53L volume he would need an additional sparge of 8.34 L for a total sparge of 20.34L.

    The malt pipe will hold quite a lot of sugars amongst the grist. My understanding of astringent tannins being extracted from sparging has more to do with the temp of the sparge water (i.e. too hot) and the gravity at which the sparge comes out. IIRC Isn't it thought to be about 1.010 SG where tannin extraction from the grain husks might occur most rapidly? I have sparged my 50L malt pipe with about 20L in total and the last runnings were still around 1.020 SG. Caveat being that I quite often extra-sparge over a bucket to collect runnings to top up the boil should I be short on volume near the end of the boil. You could even extra-sparge over a bucket to collect additional wort for yeast starters.

    edubrueurope - how do you get losses of only one litre, or did you mean 43L, not 53L into the fermenter?
     
  11. stux

    Hacienda Brewhaus

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    Posted 17/12/12
    Yep, refractometer tool, and re stalking, I just stalk the latest threads block. Maybe you post when I check ;)
     
  12. Hadrian

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    Posted 18/12/12

    Hi Malted what is the reason you can't have the malt pipe submerged with wort?
     
  13. seamad

    beer dog

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    Posted 18/12/12
    I think,at least with my ghetto one, that you couldnt dough in and keep the grain in the pipe.
     
  14. Florian

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    Posted 18/12/12
    You can always add water after the grain's in. Have done that once, more by accident than anything else, but had no negative effects as far as i could tell. You obviously dont get the nice wort over flow.
     
  15. edubrueurope

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    Posted 18/12/12
     
  16. Thefatdoghead

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    Posted 18/12/12
    1.5 hr boil ill boil off 10 L and 7 plato is 1.028 (get a hydro). If it were my BM you would end up with 44 L of cooled wort at the end of the boil. 53-11=42, 42+12=54, 54-10 (1.5 hr boil off 7L per hr) =44, 44-4=40L. Get a hydro and save yourself the trouble of using charts for you brix meter after fermentation.
    If I want 50L into the fermentor i'll rinse the grains with about 22L of 84 degree water.
     
  17. Malted

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    Posted 18/12/12
    =

    :super:
     
  18. Damien13

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    Posted 18/12/12
    Of interest, when you Brau legends are collecting extra runnings, what type of bucket/collection recepticle do you use???
     
  19. Malted

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    Posted 18/12/12
    You are getting good OG & FG.
    If it works for you, then nothing is wrong.

    As Gav80 has suggested, you may need MORE sparge if you want a greater bottling volume. But that is up to you. If you are happy with what you are getting, then continue doing that.

    Sparging is best done in small amounts over a period of time, don't dump the whole amount in all at once. Lift the malt pipe up, let it sit above the wort and start the boil sequence. It will take a period of time to reach boiling temperature, perhaps 1/2 hr or so. This is when you can sparge 2L or so at a time, wait till it is almost drained and repeat until you have used the total sparge amount.

    How to drain the malt pipe into a bucket.
    The malt pipe is bigger than any bucket I have. Sit the BM lid upside down on the bucket with one of the vents in the bucket. Sit the malt pipe on the lid so that it covers that vent - this will drain/funnel the runnings into the bucket regardless of the size of the bucket. You throw some extra sparge water at it and drain into multiple vessels if you want to check the gravity of what comes through on each occasion you add sparge water. Drain into one bucket, check gravity, tip wort into 2nd bucket, sparge into 1st bucket, check gravity, tip into 2nd bucket to top up the volume, repeat for as long as you like (depending upon gravity of runnings). Boil these extra runnings in a pot on the stove/bbq etc to sterilise it and reduce the volume to increase the gravity to about 1.040 (10 plato) when cooled to around 20oC. Note gravity varies with temperature.

    Commonly folks will then freeze this extra wort to be used for starters at a later time (eg to get the yeast ready for the next as yet unbrewed batch).
     
  20. Malted

    Humdinger

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    Posted 18/12/12
    I have outlined the process above but to add to that, any robust* food grade bucket will do.

    *So it can take the weight of the malt pipe full of wet grain.
     

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