Over 100% mash efficiency or broken hy - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Over 100% mash efficiency or broken hy

Reply
 
Thread Tools
Old 06-23-2013, 07:05 AM   #1
Cajun_McChicken
Recipes 
 
Aug 2011
Campbell, California
Posts: 59



So I recently took about a 10 month hiatus from brewing during which time I made some improvements to my system by adding a chugger pump that I use to transfer water and wort, recirculate the mash, and whirlpool after boiling. Pretty much everything else is as it has always has been: 10g drink cooler for HTL with 1500w element controlled by my ranco temp controller, another 10g round cooler with a copper manifold and lock-line return tubing for the MLT and a 10g winco aluminum kettle.

So here's my issue: each of my first two mashes on my new pump system have come out to (according to beer smith) 124-6% efficiency. The mash I just finished was an American Amber franken-brew that I used 5lb of fresh 2-row for and the leftovers of every other specialty grain I had in the freezer (most over a year old).

Estimated pre-boil volume 7g
measured pre-boil volume 6.67g (pump mishap spilled some sparge water; I'm still learning to use it)
Estimated pre-boil gravity 1.041
Measured pre-boil gravity 1.064

I just checked my hydrometer and it seems to be working fine (1.000 in cool tap water)

Any ideas on what might cause this?

recipe printout below


File Type: pdf Untitled.pdf (28.3 KB, 84 views)

 
Reply With Quote
Old 06-23-2013, 10:44 AM   #2
RoadKing
Recipes 
 
Oct 2005
Bayville, N.J.
Posts: 467
Liked 20 Times on 17 Posts


Maybe it wasn't stirred when you took that sample and you got the heavier sugars?
What was the OG into the fermenter?


__________________
DIRTY GARAGE BREWING CO.

 
Reply With Quote
Old 06-23-2013, 03:58 PM   #3
JDGator
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Feb 2013
Powassan, Ontario
Posts: 733
Liked 59 Times on 47 Posts


I'm not expert but i don't think you can take out more sugars from the grains then available.

 
Reply With Quote
Old 06-23-2013, 06:22 PM   #4
luhrks
Recipes 
 
Dec 2011
Posts: 340
Liked 20 Times on 17 Posts


You always want to stir before you take a hygrometer reading. You will get sugar stratification.

 
Reply With Quote
Old 06-28-2013, 05:21 PM   #5
Cajun_McChicken
Recipes 
 
Aug 2011
Campbell, California
Posts: 59


Yup, I didn't stir the wort. Duh...

 
Reply With Quote
Old 06-28-2013, 05:34 PM   #6
novahokie09
Recipes 
 
Aug 2012
Centreville, VA
Posts: 188
Liked 33 Times on 17 Posts


This is not due to lack of stirring. It's most likely that you're comparing your first runnings to the OG, which is based on the 1st runnings + sparge water.

How did you measure your water volume? Are you measuring the first runnings or first runnings + sparge?

It's my guess that you're measuring your first runnings, which is less volume and more concentrated sugars.

 
Reply With Quote
Old 06-28-2013, 06:39 PM   #7
Cajun_McChicken
Recipes 
 
Aug 2011
Campbell, California
Posts: 59


Quote:
Originally Posted by novahokie09 View Post
This is not due to lack of stirring. It's most likely that you're comparing your first runnings to the OG, which is based on the 1st runnings + sparge water.

How did you measure your water volume? Are you measuring the first runnings or first runnings + sparge?

It's my guess that you're measuring your first runnings, which is less volume and more concentrated sugars.
I'm pretty sure it's a stirring issue. I pulled my hydrometer sample from my kettle once the sparge was complete and the full boil volume was in there. Since the first runnings went in first and they are more dense than the final runnings it makes sense that they would hang out at the bottom and give me a too-rich reading if I didn't stir it up.

 
Reply With Quote
Old 06-29-2013, 06:53 AM   #8
ImperialLover
Senior Member
HBT_LIFETIMESUPPORTER.png
 
ImperialLover's Avatar
Recipes 
 
Aug 2009
Huntsville, AL
Posts: 515
Liked 28 Times on 25 Posts


Did you account for temperature and/or use any adjuncts?
__________________
-Chase

Keg 1- Air
Keg 2- Air
Primary 1- Rainy Day Red
Primary 2- Air
Secondary 1- Air
Secondary 2- Air
On Deck- H&D On the Brown Low
In The Hole- Water into Barleywine!
Near Future-

 
Reply With Quote
Old 06-29-2013, 11:20 AM   #9
broadbill
Recipes 
 
Aug 2007
Southern Maine
Posts: 3,912
Liked 525 Times on 353 Posts


Quote:
Originally Posted by Cajun_McChicken View Post
I'm pretty sure it's a stirring issue. I pulled my hydrometer sample from my kettle once the sparge was complete and the full boil volume was in there. Since the first runnings went in first and they are more dense than the final runnings it makes sense that they would hang out at the bottom and give me a too-rich reading if I didn't stir it up.
Did you pull the sample from the bottom?

Boy, I can't see stirring being an issue here, I would think that combining runnings (however you do it) would mix it up pretty good....

How did you calculate efficiency?

 
Reply With Quote
Old 06-29-2013, 11:48 AM   #10
passedpawn
Waste Allocation Load Lifter - Earth Class
HBT_ADMIN.png
 
passedpawn's Avatar
Recipes 
 
Apr 2009
☼ Clearwater, FL ☼
Posts: 25,650
Liked 6625 Times on 3914 Posts


Quote:
Originally Posted by broadbill View Post
Did you pull the sample from the bottom?

Boy, I can't see stirring being an issue here, I would think that combining runnings (however you do it) would mix it up pretty good....

How did you calculate efficiency?
It happens. I used to see this sort of stratification in my boil pot. I also would have thought that they would mix better.

Though, I think a lot of the wild efficiency stories are just due to measuring the volumes wrong, or measuring the wrong things altogether.

I think it's possible to get better than 100% in a lab setting, where extraction of sugars doesn't rely on mashing, but instead on some other method. I read that somewhere.


__________________
- Andrew

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Broken Thermometer in mash WTF! frod1963 Equipment/Sanitation 3 03-15-2013 01:05 AM
Do people report mash efficiency or brewhouse efficiency? thisoneguy All Grain & Partial Mash Brewing 66 07-25-2012 05:37 AM
Mash efficiency vs Post boil efficiency RootDownBrewing Beginners Beer Brewing Forum 1 08-21-2011 12:33 PM
Broken mercury thermometer in mash anton005 All Grain & Partial Mash Brewing 10 02-18-2011 08:05 PM
Broken glass in mash Teddypower General Techniques 11 04-06-2009 06:09 PM


Forum Jump