Currently puzzling with an odd puzzle from my last two BIAB brews. Very low efficiency.
Both had 75L of water in a conical pot with approx 11kg of grain.
Both ended with an OG of around 1.035. Calculated was around 1.048-1.050.
Unsure what could have caused this. Any thoughts or ideas?
Super-low efficiency...
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Rookie
- Falling off the Barstool
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Re: Super-low efficiency...
The grain crush can effect the O G. I went from 59% to 67% by running the grains through my mill a second time.
I'm just here for the beer.
Re: Super-low efficiency...
What volume did you end with and what was the calculated efficiency ?
The usual suspects....
hydrometer calibration
temp of wort when you took the measurement
stratification of the wort when you took the measurement (I've has this a few times)
misweighing the grain
The usual suspects....
hydrometer calibration
temp of wort when you took the measurement
stratification of the wort when you took the measurement (I've has this a few times)
misweighing the grain
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Jocky
- Even further under the Table
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Re: Super-low efficiency...
What was different in these batches from every batch before?
New technique or new ingredient? Could be ropey grain or a bad crush if it's a new bag of grain.
Did you raise the temperature at the end of the mash and give it a good slosh around to rinse out the sugars?
New technique or new ingredient? Could be ropey grain or a bad crush if it's a new bag of grain.
Did you raise the temperature at the end of the mash and give it a good slosh around to rinse out the sugars?
Ingredients: Water, Barley, Hops, Yeast, Seaweed, Blood, Sweat, The swim bladder of a sturgeon, My enemies tears, Scenes of mild peril, An otter's handbag and Riboflavin.
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owatts
Re: Super-low efficiency...
Hey guys - sorry, just saw all your kind replies.
I suspect it is the crush. This time I performed a 'pseudo-sparse' by recirc-ing the wort through the bag, and jiggling the bag around in the kettle before pulling it.
I also shook up the bag of malt before using it (I'm using a 25kg sack) and got a lot more floury particles which I suspect are easier to convert into beautiful malty sugar.
Got 55% efficiency this time.
Cheers!
I suspect it is the crush. This time I performed a 'pseudo-sparse' by recirc-ing the wort through the bag, and jiggling the bag around in the kettle before pulling it.
I also shook up the bag of malt before using it (I'm using a 25kg sack) and got a lot more floury particles which I suspect are easier to convert into beautiful malty sugar.
Got 55% efficiency this time.
Cheers!
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EoinMag
Re: Super-low efficiency...
55% efficiency is also piss poor to be honest, you are describing my mash sizes and I get between 70 and 85% efficiency depending mostly on the grain source.....