Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Second BIAB efficiency, 76%

Reply
 
LinkBack Thread Tools
Old 06-24-2010, 04:47 AM   #1
262andbrew
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Lincoln, NE
Posts: 109
Liked 2 Times on 2 Posts

Default Second BIAB efficiency, 76%



My first was about 60%, but number 2 was much better and will have better ferment-ability.

Round one I had about 4 pounds of grain more but I ended up with the same OG.

Read a little bit, learned a bit, and got a bit better.

Sorry for the random brag, but I am stoked.
__________________
262andbrew is offline
 
Reply With Quote Quick reply to this message
Old 06-24-2010, 04:21 PM   #2
halite
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2010
Location: Dublin
Posts: 106
Default

76% is a good efficiency with BIAB, however you can get higher, a bit of practice and refining your process and you should get it over 80%. Well done.

__________________

______________
Halite
Dublin, Ireland
http://riverroadbrewery.blogspot.com/
Kegged - Session Stout, Cascade IPA
Bottled - ISO Standard Stout, Steam Punk California, Session Stout

halite is offline
 
Reply With Quote Quick reply to this message
Old 06-24-2010, 04:23 PM   #3
FromZwolle
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: beecher, il
Posts: 8,546
Liked 50 Times on 40 Posts
Likes Given: 2

Default

check the crush, with biab you can go a little finer than without. good job, though.

__________________
FromZwolle is offline
 
Reply With Quote Quick reply to this message
Old 06-24-2010, 04:25 PM   #4
262andbrew
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Lincoln, NE
Posts: 109
Liked 2 Times on 2 Posts

Default

Thanks. -- I think that the next step is to get my own grain crusher instead of relying on the HB supply. Maybe in a month or 2 (after the wife forgets how much I have spent on the Keezer ).

__________________
262andbrew is offline
 
Reply With Quote Quick reply to this message
Old 06-25-2010, 03:08 AM   #5
neomantra
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Silver Spring, MD
Posts: 200
Liked 8 Times on 6 Posts
Likes Given: 4

Default

So do tell...what'd you change? I also started BIAB recently...still refining my process

__________________
neomantra is offline
 
Reply With Quote Quick reply to this message
Old 06-25-2010, 03:17 AM   #6
orangehero
Feedback Score: 2 reviews
Recipes 
 
Join Date: Apr 2010
Location: Northeast
Posts: 894
Liked 105 Times on 56 Posts
Likes Given: 181

Default

Did you do total water in mash, or did you dunk sparge it?

I mashed in at 1.25 qt/lb, then did a dunk sparge with the rest of the pre-boil volume, and got 78% last time.

I find the main issue with BIAB is the lack of ability to vorlauf (well, depends how you do it), which leads to a bit of extra break material in the kettle.

__________________

Last edited by orangehero; 06-25-2010 at 03:24 AM.
orangehero is online now
 
Reply With Quote Quick reply to this message
Old 06-25-2010, 05:00 AM   #7
262andbrew
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Lincoln, NE
Posts: 109
Liked 2 Times on 2 Posts

Default

I have had 24 hours to think through the differences, here is what I have come up with:
The number actually came in at 78%.
This recipe used Golden Promise, first batch was primarily US 2 row.
I overshot the temp in the first round, nearly 160 degrees for the whole time . This time was right at 150 for about 40 min, then kicked the heat on to 160 for about 15 or 20 min.
I wrapped the Keggle in blankets this time and it was less windy so my temp control was better.
Stirring was about the same, but tried to give it some agitation every 10 or 15 min.
Mashed with all my water both times but started with about 3q more this time so I was not quite as worried about coming up short in volume.
No sparge either time.
There was a lot of break material for both batches, something that took me off gaurd coming from extract brews.

I don't know which pieces had the most effect on the change, but temp is my best guess. The next batch is mainly 2 row, so that will eliminate that variable (and I am not expecting that to be much of a difference maker).

That is all I can think of at this point, at any rate I am happy with the increase and if I get 75 to 78 in every batch I will be happy.

Good night all.
Peace.

__________________
262andbrew is offline
 
Reply With Quote Quick reply to this message
Old 06-25-2010, 06:56 PM   #8
262andbrew
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Lincoln, NE
Posts: 109
Liked 2 Times on 2 Posts

Default

Ummm, duh, my fault... one other variable. The second brew had 3 or 4 pounds less grain. So that could be a big part of why the efficiency was higher on the second batch. I understand there is some limits to the highest gravity that BIAB will work well on. It could be that I was just bumping into that in the 1.063-65 range for the first (less successful) brew.

__________________
262andbrew is offline
 
Reply With Quote Quick reply to this message
Old 06-26-2010, 06:24 PM   #9
jjones17
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Nanaimo, BC, Canada
Posts: 617
Liked 8 Times on 8 Posts
Likes Given: 3

Default

If I may chime in, I love BIAB. I have nailed it down pretty good for what works for me, and get 83% efficiency pretty much everytime. Let me try to help you out a bit based on your statements above.

This recipe used Golden Promise, first batch was primarily US 2 row.

The diastic power difference between these two grains will not really affect your efficiency that much.

I overshot the temp in the first round, nearly 160 degrees for the whole time . This time was right at 150 for about 40 min, then kicked the heat on to 160 for about 15 or 20 min.

Sorry to hear this, but why did you leave it at 160f? I highly highly reccomend adding cold water to your mash next time (little tiny bit at a time) until you hit your target and starting your mash clock at that point. Also: Why the 160F ? Is this a step mash or were you trying to mash out?

I agree - Your temp was a small part of your efficiency, but not a big one. The biggest reason your efficiency was so low in batch one was your mash thickness. My efficiency went past 80% when I started making sure my mash was thin enough to ensure I could stir properly to get all the grain soaked with water. What I like to do is mash in 5 degrees or more too HIGH, then stir like a madman for 5-8 minutes. By then, I am usually at my mash traget temp and I can lid the sucker. If I am too high, I add a tiny bit of cold water, stir, until I hit my target.

Our processes differ a bit though, as I mash in 1 or 2 pots and place them in an oven preheated to 170F (I turn offf the oven once the pots are inside).

I also sparge for 10 mins. I think the sparge helps. All I do is lift my grain bag out of the tun after conversion, and place it in another container (old crappy pot works well). I then move my first runnings to my boil pot, and use put my bag(s) back in the tun(s). I add 175F(ish) water and make sure I am around 165F. I lid for 10 mins, take out the bag, and add the second runnings to my boil pot. I also have a measure stick to make sure my volumes are ok.

So, for you since you have a keggle you may not be able to sparge depending on how many spare pots you have or if you want to bother with all that lifting. 78% is pretty good without a sparge, and it was most certainly that your mash was not as thick so you got better absorbtion into your grains.

Hope that info helps

__________________
jjones17 is offline
 
Reply With Quote Quick reply to this message
Old 06-26-2010, 06:30 PM   #10
jjones17
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Nanaimo, BC, Canada
Posts: 617
Liked 8 Times on 8 Posts
Likes Given: 3

Default

Quote:
Originally Posted by 262andbrew View Post
It could be that I was just bumping into that in the 1.063-65 range for the first (less successful) brew.
Me again - I wanted to help you here also if I can.

The rumor that BIAB does not work as well above that range is untrue; as long as your mash is thin enough to allow your grains proper absorbtion, you can do high gravity beers just as well (maybe better) in BIAB than using a cooler mlt or something else like that.

I regularly do BIAB 1.090 +++ and get 80%+ efficiency providing my mash is thin enough, and I stir very well making sure there are ZERO lumps. Very important, can't stress it enough.

From one BIAB brewer to another!

PS: You may need 2 mash tuns, a cheap pot mashed in your preheated oven (heat off during mash though) works VERY well.
__________________
jjones17 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
Improved my BIAB Sparge Efficiency drastically jjones17 All Grain & Partial Mash Brewing 6 05-27-2010 07:29 PM
BIAB partial mash efficiency question neomantra All Grain & Partial Mash Brewing 2 05-26-2010 05:39 PM
Modified BIAB: hitting 85%+ efficiency jaginger All Grain & Partial Mash Brewing 26 02-28-2010 02:37 PM
If you BIAB... ScubaSteve Equipment/Sanitation 19 02-24-2010 12:54 PM
FWH when doing BIAB? emr454 General Techniques 16 02-13-2009 06:48 PM