Happy HolidaySs Giveaway - Last Sponsor Giveaway of the Year!

Come Enter the BrewDeals/FastFerment Giveaway!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > mash/sparge question (big beer)
Reply
 
LinkBack Thread Tools
Old 07-02-2006, 12:23 AM   #1
barside laundry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2005
Location: lancaster, pa
Posts: 62
Default mash/sparge question (big beer)

I just made my 4th all grain batch, an Imperial Stout with 21 pounds of grain. After mashing at 155 for 60 minutes I added about 2 gallons of 205F water from the HLT to bring the mash upto 170F. I stirred the mash until the entire grain bed was 170 and then let it sit for 10 minutes. I then started to recirculate for about 10 minutes (about 5 quarts). I slowly drained the wort into the kettle. Everytime I do this I always ask myself, "Should I allow all the mash water (wort) drain out of the grain and THEN add sparge water or should I add the sparge water as I am draining the tun?" I do not have a sparge arm I just allow the vinyl tube to drip on top of the grain bed and I try to keep about an inch of water on top of the grain (although the grain floats so i never really know how much water is on top). With this particular recipe I drained the tun and added the sparge water and the wort was thick and black all the way up to 9 gallons in the kettle! My kettle is a 15.5 gallon keg with a 3.5kwatt element that evaporates over a gallon an hour so I usually start with 7 gallons anyway. This time I just boil the wort for about 1.5 hours (until I got down to 7.25 gallons) and then started my 60 minute brew session. The pre boil gravity was 1056 and the after boil gravity was 1098. I ended up with 5.5 gallons in my fermenter. As the wort was boiling I decided to open the valve on my mash tun and "just see" how much drains out. Well I accumulated about 3 gallons of wort! I hated to dump that down the drain. Thoughts, commendations, recommendations on my process?

__________________
Tap 1 (stout faucet w/ nitrogen): Trout's Oatmeal Stout

Tap 2: none

Primary: Bavarian Dunkel
Secondary: Victory Hop Devil

"That rug really tied the room together, did it not?"
barside laundry is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2006, 01:05 AM   #2
RichBrewer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
RichBrewer's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Denver, Colorado
Posts: 5,767
Liked 85 Times on 41 Posts
Likes Given: 75

Default

Doing some quick calculations with ProMash, I figure that you should have gotten about 13 gallons into your brew kettle. This is based in 5 1/4 gallons for the mash and 10 1/2 gallons for sparging. ( A little over 2 gallons absorbed by the grain and you loose a bit in your tun)
Having said that, ProMash gives an OG of 1.104 at 75% efficiency so you are not too far off. Did you measure the SG of the left over wort? If it were above 1.012 or so I would have been tempted to throw it into the kettle and boil it down with the rest of the wort.
If the extra wort has a bit of gravity to it you could also make a smaller batch with it. Who knows, might make a good beer.

__________________

Cheers,
Rich

RichBrewer is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2006, 02:01 AM   #3
david_42
Feedback Score: 0 reviews
 
david_42's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Willamina & Oak Grove, Oregon, USA
Posts: 25,656
Liked 136 Times on 129 Posts

Default

Big beers mean plenty of sparging, though it sounds like you did a good job. If you are batch sparging, you drain the bed & refill it. Short of checking the gravity of the last run, I'd say you did well.

By the way, you will probably like the PRA. The corn comes through as a trememdous mouthfeel and a nice tang.

__________________

Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

david_42 is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2006, 03:00 AM   #4
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ajf's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Long Island
Posts: 4,643
Liked 99 Times on 93 Posts
Likes Given: 39

Default

Quote:
Originally Posted by barside laundry
I slowly drained the wort into the kettle. Everytime I do this I always ask myself, "Should I allow all the mash water (wort) drain out of the grain and THEN add sparge water or should I add the sparge water as I am draining the tun?"
If you drain the all the wort out before adding sparge water, then the grain is not supported by the wort and can become compacted. This can cause a stuck (or extremely slow) sparge. If you keep the sparge water roughly level with the grain bed, this doesn't happen. Don't ask me how I know this.
I am also puzzled by your comment that your grain floats, so you can't judge how much sparge water you have above the grain bed. My grain stays on the bottom, and the sparge water lays on the top so it's easy to see how much the water level is above the grain bed. I use a roller mill which leaves the husks pretty much intact, and a sparge arm which adds the water very gently.
From your description, I would suspect that you may be shredding your husks during the milling. (The husks are lighter than water and will float.)

Hope this helps.

-a.
__________________
ajf is offline
 
Reply With Quote Quick reply to this message
Old 07-02-2006, 03:07 AM   #5
barside laundry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2005
Location: lancaster, pa
Posts: 62
Default

That makes sense! I get my grain crushed at my LHBS and I have heard that he crushes too much.

__________________
Tap 1 (stout faucet w/ nitrogen): Trout's Oatmeal Stout

Tap 2: none

Primary: Bavarian Dunkel
Secondary: Victory Hop Devil

"That rug really tied the room together, did it not?"
barside laundry 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
Mash/Sparge Question... yeqmaster All Grain & Partial Mash Brewing 5 12-13-2009 03:29 PM
Big Beer + Thin Mash = Tiny Sparge? EvilGnome6 All Grain & Partial Mash Brewing 12 08-06-2009 03:40 PM
Fly Sparge Mash Out Question Rockweezy All Grain & Partial Mash Brewing 1 03-02-2009 01:22 AM
Mini Mash - sparge question and boil amount Grinder12000 All Grain & Partial Mash Brewing 2 10-14-2008 06:27 PM
Quick Mash/Batch Sparge question BugleBrew General Techniques 5 09-22-2008 07:15 PM



Newest Threads

LATEST SPONSOR DEALS