Electric Brewing Supply 30A BCS Giveaway!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > 2nd BIAB low efficiency
Reply
 
LinkBack Thread Tools
Old 06-03-2012, 03:20 AM   #1
UnrulyGentleman
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Location: Woodland, California
Posts: 37
Liked 2 Times on 2 Posts
Likes Given: 5

Default 2nd BIAB low efficiency

Just wrapped up my second ever attempt at a BIAB session and wound up with about 55% efficiency, which is disappointing, but I know I'm new at it and will continue to improve. Can anyone lend a hand at pinpointing my issue?

Recipe
14lbs Pale Ale malt
11oz Crystal 60L

1.29oz Magnum (60)
1oz Magnum (5)
1oz Mt. Hood (5)

US-05 yeast

Mash at 152*
90 min boil

Batch size: 5.5 gal
Target OG: 1.070
Actual OG: 1.055

So, my 8.3 gal of strike water was heated to about 166* and when I mashed in, I pretty much got it to only 160*. When I eventually got to 152* I held it very steady at that temp for 60 minutes wrapped in blankets. I mashed out at 170* and held it there for 10 minutes. I collected just over 7 gallons pre-boil and after the 90 minute boil it finished at exactly 5.5 gallons. The bag I use is a 5 gallon paint strainer. The bag can support the weight of grain, but is perhaps to small to allow the grain to freely move in my 10 gallon kettle. My main concern for this particular batch is a poorly balanced beer that has strong bitterness without the malt body to back it up. Any thoughts or suggestions for my next go round? Thanks in advance!

__________________
No, Pants! Brewery
UnrulyGentleman is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 01:00 PM   #2
christpuncher123
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2009
Location: Kingston, Ontario
Posts: 172
Liked 10 Times on 7 Posts
Likes Given: 2

Default

With that much grain you would want to stir quite often during the mash to evenly disperse the mash, that helps a lot, Try even lifting bag out for a second, stirring mash and then put bag back in.

__________________
christpuncher123 is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 01:53 PM   #3
jcdouglas
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2011
Location: Madison, WI
Posts: 133
Liked 3 Times on 3 Posts
Likes Given: 4

Default

I second the stirring.

How was the crush? Sometimes crushing it twice will help efficiency.

__________________
jcdouglas is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:14 PM   #4
Brewitt
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Brewitt's Avatar
Recipes 
 
Join Date: Jun 2011
Location: Encinitas, CA
Posts: 817
Liked 67 Times on 61 Posts
Likes Given: 9

Default

I have been shooting for 70% efficiency and getting close most of the time. Not as high as I would like but I have only gotten over 75% once, and I don't quite know why. I second the stirring and the double crushing. The other thing is making sure your bag is big enough to line the whole pot giving plenty of room for the mash to get to the grain. Both of those improved things for me. Full volume extractions are also best although with big beers, which is mostly what I brew, I have been doing a batch sparge in a pot after the mashout. Still hoping for a regular efficiency of 75% but only counting on 70%.

__________________
Brewitt is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:18 PM   #5
Golddiggie
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Golddiggie's Avatar
Recipes 
 
Join Date: Dec 2010
Location: Between here and there, and everywhere
Posts: 12,058
Liked 478 Times on 420 Posts
Likes Given: 266

Default

How well did you get rid of the clumps in the grain?? That alone will kill your efficiency. If you don't mix well enough to break them all up, that's a major issue.

__________________
Hopping Tango Brewery

跟猴子比丟屎 ・ Gun HOE-tze bee DIO-se

On Tap: Caramel Ale, Mocha Porter II, MO SMaSH IPA
Waiting/Carbonating: 12.5% Wee Honey II, 8.9% Old Ale, English Brown Ale, Lickah ESB, Mocha Porter II
Fermenting
K1:
K2: Epic mead
K3: TripSix
On Deck: Caramel Ale
Aging:mead
Mead [bottled]:Oaked Wildflower Traditional, Mocha Madness, Blackberry Melomel, maple wine
Golddiggie is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:32 PM   #6
j1laskey
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2010
Location: Boston
Posts: 1,865
Liked 191 Times on 154 Posts
Likes Given: 8

Default

You have to mix the grain every 5-10 mins. It's totally a PITA, but if you want efficiencies is the mid 70's you have to sit there and mind the kettle.

And mix well.

__________________
Primary: Hornpout Stout
Secondary:
Kegged: Monsta Pumpkin Mash, Saint Stephens' Eleven Ale, Pirate Strong Ale, Cascadian Dark Ale
The Secretion Brewery

Let's think it over and stop making sense
j1laskey is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:51 PM   #7
Golddiggie
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Golddiggie's Avatar
Recipes 
 
Join Date: Dec 2010
Location: Between here and there, and everywhere
Posts: 12,058
Liked 478 Times on 420 Posts
Likes Given: 266

Default

Quote:
Originally Posted by j1laskey View Post
You have to mix the grain every 5-10 mins. It's totally a PITA, but if you want efficiencies is the mid 70's you have to sit there and mind the kettle.

And mix well.
It's been more than a while since I did BIAB, but I don't have to do that at all with my keg mash tun. I dough-in, equalize/stabilize the temperature, insert the thermocouple/probe into the mash and then cover and walk away. I check the temperature every 15-30 minutes during the mash (depending on the outside temperatures) and then finish processing the grain as normal (heat the grain bed to sparge temp), then use the auto-sparge (or another way to get the sparge water in) to sparge.
__________________
Hopping Tango Brewery

跟猴子比丟屎 ・ Gun HOE-tze bee DIO-se

On Tap: Caramel Ale, Mocha Porter II, MO SMaSH IPA
Waiting/Carbonating: 12.5% Wee Honey II, 8.9% Old Ale, English Brown Ale, Lickah ESB, Mocha Porter II
Fermenting
K1:
K2: Epic mead
K3: TripSix
On Deck: Caramel Ale
Aging:mead
Mead [bottled]:Oaked Wildflower Traditional, Mocha Madness, Blackberry Melomel, maple wine
Golddiggie is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:54 PM   #8
phoenixs4r
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Hayward, California
Posts: 1,506
Liked 54 Times on 49 Posts
Likes Given: 38

Default

I don't biab but 15 pounds of wet grain in a 5 gallon bag seems kinda tight, no?

__________________
Cabikegorator - the cabinet refrigerator project.
phoenixs4r is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 10:55 PM   #9
SpacemanSpiff
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
SpacemanSpiff's Avatar
Recipes 
 
Join Date: Dec 2009
Location: Chicagoland
Posts: 193
Liked 19 Times on 13 Posts

Default

I don't think simply stirring more is the answer. I stir at mash in and maybe once or twice during the mash and have routinely been in the 70's. The bigger grain bill isn't doing you any favors, but as long as you don't have dough balls I don't see how more stirring will drastically improve anything.

The biggest boost I got was when I started double crushing and also when I've taken extra steps to drain the bag as much as possible. I throw mine in another pot with one of those strainer baskets and let it drain on its own for 10-15 minutes then give it a good squeeze. For the bigger grain bill, a small sparge would help as well. I've done that on occasion but didn't on my last batch and still hit my expected 70 on the nose. I think you get some pretty concentrated wort bound up in that bag and it's a big loss to leave it in the grain.

That's my guess anyway, especially based on you winding up with 7 gallons after a 8.3 gal strike. I only lost about 1/2 gallon on my last batch with about an 11 lb. grain bill.

__________________
SpacemanSpiff is offline
 
Reply With Quote Quick reply to this message
Old 06-03-2012, 11:32 PM   #10
Brewitt
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Brewitt's Avatar
Recipes 
 
Join Date: Jun 2011
Location: Encinitas, CA
Posts: 817
Liked 67 Times on 61 Posts
Likes Given: 9

Default

I think optimizing each thing helps so stirring (about every 15 min for me) equalizes temperature, double crushing liberates more starch and enzymes for conversion, squeezing and sparging for big beers optimizes extraction and volume. Small grain bills get better efficiency (I've gotten close to 80 with a 5% ABV brew). I got near 70 with a 23 lb grain bill in 5 gals for the Russian imperial stout I did last week. Just tasted and got SG and it tastes rich and wonderful at 9.7 % ABV.

On the issue of 15 lbs in 8 gallons. That is way more water than the same grain bill in. Mash tun. I did 36 lbs in 11 gallons yesterday and sparged with 5 gallons for a double IPA yesterday and got around 68% efficiency. Yes it was crazy but I wanted to try a BIAB in a keggle for a 10 gal brew. Worked out well. Not recommended for high efficiency though :-)

__________________

______________________________________
"Here's to brewers yeast, that humblest of all beasts
"
Adam Cole (aka cadamole) http://www.youtube.com/watch?v=L6dzUOYTQtQ)

Brewitt 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
Just hit my best BIAB efficiency yet frailn All Grain & Partial Mash Brewing 13 07-18-2011 09:22 AM
90% efficiency with BIAB Bradinator All Grain & Partial Mash Brewing 10 06-14-2011 04:29 AM
BIAB Efficiency ayoungrad All Grain & Partial Mash Brewing 12 04-06-2011 02:07 PM
Much better BIAB efficiency! TacoBrew All Grain & Partial Mash Brewing 8 03-18-2011 03:03 PM
Second BIAB efficiency, 76% 262andbrew All Grain & Partial Mash Brewing 12 06-28-2010 04:26 AM