Spike Brewing 12.5 Conical Fermenter Giveaway!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Help with understanding batch sparging measurements

Reply
 
LinkBack Thread Tools
Old 07-19-2012, 06:32 PM   #1
cokronk
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Shepherdstown, WV
Posts: 115
Default Help with understanding batch sparging measurements

OK, so last weekend I did a 10 gallon batch but I'm not exactly sure I got the water amounts right and I'm wondering how much I'm supposed to use and why?

I used 30 lb of grain and needed about 12 gallons pre boil according to pro mash. If that's the case, how much water should I have used with my mash and how much with my sparge? Dry grains will of course absorb water, so it's definitely not a cut and dry 6 for mash, 6 for sparge. How do I figure this out?

__________________
cokronk is offline
 
Reply With Quote Quick reply to this message
Old 07-19-2012, 06:38 PM   #2
phenry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Clemson, SC
Posts: 1,219
Liked 115 Times on 72 Posts
Likes Given: 21

Default

I always figure about 0.52 qt/lb absorption for the mash, and then whatever volume of sparge water I need to add to hit my preboil volume. So for a 13 lb grainbill, 6.25 gal preboil, and mashing at 1.25 qt/lb, you'll be figuring a hair over 4 gallons for your mash water, and 4 gallons for your sparge. The grain won't soak up anymore water after the first runnings are drained (or at least a negligible amount) so you can adjust the sparge water volume as you see necessary once you figure the volume of your first runnings.

__________________
phenry is offline
 
Reply With Quote Quick reply to this message
Old 07-19-2012, 06:44 PM   #3
TyTanium
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2011
Posts: 3,949
Liked 548 Times on 386 Posts
Likes Given: 418

Default

~1 pint absorption per 1 pound of grain.

30lbs x 1/8 gallon = 3.75 gallons absorbed. 12 gallons preboil + 3.75 gallons lost = 15.75 gallons total water needed.

Then figure out your desired mash ratio, say 1.25 qts/lb. 30lbs x 1.25 qts/lb = 37.5 qts / 4 ~ 9.25 gallons.

So that leaves 15.75g - 9.25g ~ 6.5 gallons left for the sparge. But if you batch sparge, it's easier...just see what you collect after the mash, then subtract that from 12 gallons to get your sparge volume.

__________________
TyTanium is offline
 
Reply With Quote Quick reply to this message
Old 07-19-2012, 06:48 PM   #4
cokronk
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Shepherdstown, WV
Posts: 115
Default

That sounds simple enough. What's an accurate way of measuring your pre boil wert? A stick with lines marked on it for certain measurements?

__________________
cokronk is offline
 
Reply With Quote Quick reply to this message
Old 07-19-2012, 07:10 PM   #5
TyTanium
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2011
Posts: 3,949
Liked 548 Times on 386 Posts
Likes Given: 418

Default

Quote:
Originally Posted by cokronk View Post
That sounds simple enough. What's an accurate way of measuring your pre boil wert? A stick with lines marked on it for certain measurements?
Yup, that's what I use. Not very precise though. Lots of guys have sight glasses on their kettles. Another simple option is just running off into a bucket with volume measurements.
__________________
TyTanium is offline
 
Reply With Quote Quick reply to this message
Old 07-19-2012, 10:40 PM   #6
wilserbrewer
Vendor
HBT_SUPPORTER.png
Feedback Score: 9 reviews
 
wilserbrewer's Avatar
Recipes 
 
Join Date: May 2007
Location: Jersey Shore, Jersey
Posts: 6,574
Liked 421 Times on 357 Posts
Likes Given: 8

Default

Quote:
Originally Posted by cokronk View Post
How do I figure this out?
You can certainly figure it out w/ software or by hand if you know the maths and have the desire...A very simple method is just to measure your wort in the ketttle before the last sparge and subtract that from your preboil volume giving you the amount of wort needed to reach your preboil volume, this will be the same volume as needed for your last sparge...easy peasy.

So to put it into rough easy numbers, say for a 10 gallon batch you want 13 gal preboil, figuring on boiling off 2 gallons and losing a gallon to trub, leaving 10 gallons finished beer. If prior to your last sparge you have 9 in the kettle, the last sparge would be 13 minus 9, or 4 gallons.


With experience you will learn losses due to boiloff, trub/hops sludge and yeast cake to better figure for the final batch.
__________________
wilserbrewer
BIAB Bags, Hop Bags and Ratchet Pulleys for sale

Expert tailor and supplier of custom sized, top quality BIAB bags, hop bags and ratchet pulleys at reasonable pricing

http://biabbags.webs.com



CORONA MILL BUCKET SYSTEM V. 2.0
wilserbrewer is online now
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Batch Sparging pegasusherd All Grain & Partial Mash Brewing 6 04-30-2012 09:46 PM
Batch sparging Joedub All Grain & Partial Mash Brewing 6 05-27-2011 01:37 PM
Help with next AG batch: Mash out and Batch Sparging sjbeerman All Grain & Partial Mash Brewing 8 02-03-2011 06:19 PM
Batch Sparging casper0074 All Grain & Partial Mash Brewing 8 08-14-2007 09:20 PM
Fly Sparging Vs. Batch Sparging New2HomeBrew All Grain & Partial Mash Brewing 28 08-08-2007 05:25 PM