The Great Bottle Opener Giveaway

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Batch Sparging a Large Grain Bill

Reply
 
LinkBack Thread Tools
Old 01-08-2008, 02:46 PM   #1
tbone
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2007
Location: Western PA
Posts: 190
Default Batch Sparging a Large Grain Bill

For my first AG, I was able to split my sparge into two equal parts as suggested on this forum but with this large of a grain bill (17lbs)the two equal sparge volumes are to small. I am doing a 90 min boil and am using a pre-boil volume of 7 gallons. (Hopefully the 7 gal will get me 5 gallons)
Here is what I want to do.
Do a mash out with 2 gallons close to boiling.
Sparge with 1.85 gallons at 168.

This will give me just a bit over 7 gal figuring 1.25 qts per lb of grain with an absorption rate of .12gal/lb of grain.

Will this be an efficient way to sparge this large amount of grain or is there a better way?
Thanks

__________________
tbone is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:05 PM   #2
Orfy
For the love of beer!
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Orfy's Avatar
Recipes 
 
Join Date: Sep 2005
Location: Cheshire, England
Posts: 11,853
Liked 68 Times on 52 Posts
Likes Given: 30

Default

Sounds fine to me. You can jsut do 3 batches if you wanted to though.

Orfy is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:05 PM   #3
Soulive
Feedback Score: 0 reviews
 
Soulive's Avatar
Recipes 
 
Join Date: Mar 2007
Location: The Middle of NJ
Posts: 4,331
Liked 7 Times on 7 Posts

Default

Keep sparging until you have your boil volume...

__________________
Cheers!


===================
Green Lane Brewing
===================

Primary = Evan!'s Special Bitter
On Deck = EdWort's Porter / American Amber


EdWort's Haus Pale Ale Count
Soulive is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:11 PM   #4
tbone
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2007
Location: Western PA
Posts: 190
Default

Does it matter how small your sparge volume is?
And does 7 gal pre boil for 90 minutes look good for a 5 gallon batch?
I am new to AG (2nd batch) and don't have my absorption and evaporation rates down yet.

__________________
tbone is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:13 PM   #5
Soulive
Feedback Score: 0 reviews
 
Soulive's Avatar
Recipes 
 
Join Date: Mar 2007
Location: The Middle of NJ
Posts: 4,331
Liked 7 Times on 7 Posts

Default

I'm finding that it takes time to figure out absorption and boil off rates. For reference, I'm doing a 5.5 batch today with 2.5oz hops and I'm starting with 7.5 gallons in the keggle...

__________________
Cheers!


===================
Green Lane Brewing
===================

Primary = Evan!'s Special Bitter
On Deck = EdWort's Porter / American Amber


EdWort's Haus Pale Ale Count
Soulive is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:16 PM   #6
Orfy
For the love of beer!
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Orfy's Avatar
Recipes 
 
Join Date: Sep 2005
Location: Cheshire, England
Posts: 11,853
Liked 68 Times on 52 Posts
Likes Given: 30

Default

What did you get last time?

All you can do is take the recommended for the first time and take measurments and records on your system and dial in the figures until it is right.

This may help
http://www.howtobrew.com/section3/chapter17.html

__________________
GET THE GOBLIN
Have a beer on me.
Orfy is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:18 PM   #7
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 21,822
Liked 899 Times on 600 Posts
Likes Given: 26

Default

If you want to maximize your efficiency, don't add the 2 gallon mashout water. If 2gallon mashout plus 1.85 sparge was going to hit your volume, I'd recommend taking a first running first, then sparge TWICE with 2 gallons each at 180F.

If you have an accurate way of measuring your runnings volume, just figure out how much you're missing when you take your first running. If you want 7gal preboil and your first running was 3 gallons, you're right on with two 2-gal sparges. If you only get 2.5g out of first running, then make the sparges 2.25 each. Pretty simple in practice.

__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!

New Stuff?
Bobby_M is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:19 PM   #8
tbone
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2007
Location: Western PA
Posts: 190
Default

I screwed up the first time and did not measure the wort collected to figure the absorption rate. I will this time. I boiled for 60 min for the first batch and used 6.5 gallons and ended up with around 5.25 gallons.

__________________
tbone is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:24 PM   #9
tbone
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2007
Location: Western PA
Posts: 190
Default

Bobby. So you are saying not to raise the first running temp to around 168, but instead - just collect the first running as is and then do two sparges of 2 gallons at 180? I am assuming that the two sparges at 180 will bring the grain bed temp up enough to maximize extraction.

__________________
tbone is offline
 
Reply With Quote Quick reply to this message
Old 01-08-2008, 03:25 PM   #10
Orfy
For the love of beer!
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Orfy's Avatar
Recipes 
 
Join Date: Sep 2005
Location: Cheshire, England
Posts: 11,853
Liked 68 Times on 52 Posts
Likes Given: 30

Default

You also need to know what the dead space is in your kettle.
If not you need to know how much you leave behind with the hops.

If you have no dead space/loss then yo have an evaporation rate of ~20% hour.

So you should loose 30% over 90 minutes
30% of 7g = 4.9g

__________________
GET THE GOBLIN
Have a beer on me.
Orfy is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Move to Large Batch Extract or All Grain pinarphan General Techniques 7 01-31-2009 02:07 AM
First AG Batch - Grain Bill ? crzynate25 All Grain & Partial Mash Brewing 4 12-15-2008 12:51 AM
Batch sparging small grain bed in large cooler? CallMeZoot All Grain & Partial Mash Brewing 6 01-29-2008 06:17 AM
Rivisiting Sparging a Large Grain Bill tbone All Grain & Partial Mash Brewing 3 01-09-2008 09:08 PM
Large grain bill in a 5gal Igloo MLT fakeghostpirate All Grain & Partial Mash Brewing 10 09-18-2007 04:59 PM