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Old 03-07-2011, 04:19 AM   #1
gnatp2
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I'm getting about 85% efficiency while sparging. I use 1.25 qts/lb of water and typically do 60-90 min mashes at around 148-153. I fly sparge with about 4 gal or so of water until I reach my 7 gal of perboil water volume. On my last sparge, my final runnings were at 1.016

I know this isn't extremely high but I'd like to get down to 75% or so as I hear that there is the potential for tannin extraction and I typically try to make very clean and dry beers so this is an issue.

Should I just stop the sparge early and top off the kettle with pure water? Im wondering if that would help. When doea tannin extraction actually occur? Is is only in the final runnings? Or is there something I'm missing and maybe I'm not at 85% efficiency and miscalculating?

Nate

 
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Old 03-07-2011, 04:22 AM   #2
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Does the beer taste bad? If not, you have no problem. Your system works well, and you should use the experience to help guide future calculations.
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Old 03-07-2011, 04:25 AM   #3
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Damn.. I wish I had that problem....
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Old 03-07-2011, 04:26 AM   #4
gnatp2
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Quote:
Originally Posted by Yuri_Rage View Post
Does the beer taste bad? If not, you have no problem. Your system works well, and you should use the experience to help guide future calculations.
I wouldn't say bad but could it improve? Yes.

 
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Old 03-07-2011, 04:29 AM   #5
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It's my understanding that tannin extraction is more related to pH than gravity....

 
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Old 03-07-2011, 04:29 AM   #6
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Quote:
Originally Posted by gnatp2 View Post
I'm getting about 85% efficiency while sparging. I use 1.25 qts/lb of water and typically do 60-90 min mashes at around 148-153. I fly sparge with about 4 gal or so of water until I reach my 7 gal of perboil water volume. On my last sparge, my final runnings were at 1.016

I know this isn't extremely high but I'd like to get down to 75% or so as I hear that there is the potential for tannin extraction and I typically try to make very clean and dry beers so this is an issue.

Should I just stop the sparge early and top off the kettle with pure water? Im wondering if that would help. When doea tannin extraction actually occur? Is is only in the final runnings? Or is there something I'm missing and maybe I'm not at 85% efficiency and miscalculating?

Nate
How are you actually calculating your efficiency? Mash efficiency and brewhouse efficiency are different things.

Tannin extraction is not so much a factor of Mash Efficiency as it is a water temperature / pH and mechanical dispersion concern. Hot sparge, high pH and localized sparge water additions all increase the likelyhood of tannin extraction.

But if you aren't getting tannin bitterness then I wouldn't worry about it at all.

 
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Old 03-07-2011, 04:30 AM   #7
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Well how are your beers tasting?
If theres nothing wrong with the taste of the brew... 85% eff is only playing to your favor. I could see the possibility of tannin extraction Which I have done and was completely apparent what the issue was.
If you want less eff batch sparge or don't mash for so long, maybe mash at a little higher temp to lower the eff to where you want it. Best of luck
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Old 03-07-2011, 04:31 AM   #8
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Quote:
Originally Posted by LakewoodBrew View Post
How are you actually calculating your efficiency?
That's a very good point as well....

Efficiency into the kettle?

Efficiency post-boil?

Efficienct into the fermenter?

For me; the last one is the only one that matters....

 
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Old 03-07-2011, 04:44 AM   #9
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On calculating my efficiency, I hope this answers it:

I am calculating my efficiency by calculating my SG of my preboil wort and checking again postboil. I plug my grainbill and these numbers into BeerAlchemy to run my numbers.

Nate

 
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Old 03-07-2011, 04:50 AM   #10
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what are you losing post-boil to ferementer? I don't know your process; so I'm not being critical....

But for me; I lose ~0.75 gallons from post-boil to fermenter; so it does have an effect on "efficiency"

 
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