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Old 04-27-2009, 01:39 AM   #1
krausenmustache
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Default 55% efficiency on first AG batch and I think i know why

Everything went really well, temp held steady @ 154 for 60min. Recirc and batch sparge also went great. But two things come to mind which likely caused it the low eff.

1.) I completely forgot to add the ph 5.2 buffer (had it sitting in my cabinet the entire time )

2.) when i was setting up my AG equipment, not knowing any better, i bought a 5 gal cooler. So because I chose to brew an Imperial IPA w/ 16# of grain, the water/grain ratio was down around 0.88 qt/lb.

question: will the low w/g ratio result in such a poor efficiency?

If so i may just bite the bullet and buy a 10gal.

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Old 04-27-2009, 01:48 AM   #2
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The more grain the lower the efficiency will be. The only way to get it higher is more watter and a longer boil. 16 pounds in a five gallon cooler--your crazy. I've done 14 in my little five and got 68% but with ten pounds it would get 80%+. There is a point of diminishing return. I use a 48qt cooler for the bigger grain bills.

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Old 04-27-2009, 01:59 AM   #3
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I would skip a 10 gallon cooler and head straight towards something AT LEAST 12 gallons. I just did a 22lbs grainbill barleywine today and I maxed my 12g cooler. Granted, its 1.109... but I can max it out easy on mash out on batches in the 1.080s. I hit 69% which isn't bad considering. I boiled 8 gallons down to 5 in 120minutes... had some wort loss due to hops tho.

Lol... I dont even know how you can mash 16lbs in a 5 gallon cooler. The grain milled would occupy roughly 5 gallons worth of space dry!!!!!

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Old 04-27-2009, 12:41 PM   #4
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so can we agree that the likely cause of the low eff was the MLT size?

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Old 04-27-2009, 04:19 PM   #5
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Quote:
Originally Posted by krausenmustache View Post
so can we agree that the likely cause of the low eff was the MLT size?
IMHO... That would be the first place to start.
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Old 04-27-2009, 05:07 PM   #6
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That thick of a mash is impossible to stir, I bet you had a lot of doughballs and dry grain won't convert! My best efficiency is achieved at 1.5-2.0 qt/lb mash thickness... a nice thin mash which is easy to stir.

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Old 04-28-2009, 01:35 AM   #7
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Quote:
Originally Posted by Saccharomyces View Post
That thick of a mash is impossible to stir, I bet you had a lot of doughballs and dry grain won't convert! My best efficiency is achieved at 1.5-2.0 qt/lb mash thickness... a nice thin mash which is easy to stir.
+1


I like it around 1.75/ lb
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