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Old 12-06-2010, 02:52 AM   #1
dilbone
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Default 1st AG ever...but it was BIAB though

I've only done 2 coopers kits, one all extract non kit brew and my buddy and I decided to try BIAB.

Here's what we did thanks to much info on this site. We were going for a hoffbrau dunkel with this.

Grains/Hops:
5.5lbs Pilsner malt
3lbs Munich malt
.25lbs Chocolate malt
.25lbs Crystal 120

1oz. Tetnang 45min
.5oz. Tetnang 15min

We started with 4gallons with strike of 165F, put in grains dropped to around 154ish. Let it go for 70minutes, only dropped to 151F. Hit the heat up to 170F. Brought out the 2.5gallons in another pot for a 170F sparge for 15 minutes. We squeezed every last drop we could out of the grain bag and added the sparge water to the rest.
We had one boil over because I'm an idiot, but other than that things went extremely well.
After boil we put the entire 30 quart kettle into a rubbermaid tub full of ice water. Added a half of large bag of ice after about 15 minutes to the tub and had the temp of the wort down to 75 degrees in less than 35 minutes which I was pretty happy with especially without having an official cooling system of any kind.

Ended up with just under 4.5gal in the fermenter and an OG of 1.046 Both were a smidge lower than I had hoped, but I'll need to have the grain double milled next time I think...and I might do an additional rinse of the grain after the sparge with a gallon of 180F water.

I don't know about efficiencies or much else about the calculations, but I'm pretty happy with how the process went.

Any suggestions for next time? Thanks

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Old 12-06-2010, 03:41 AM   #2
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dilbone - sounds like a fine brewing day. I plan on trying BIAB one of these days. You're post makes it appear effortless.

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Old 12-06-2010, 10:44 AM   #3
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Thanks!

I think it was pretty effortless, but maybe too effortless. I just punched my numbers into hopville.com's beer calculus and to get the volumes and OG that I got it's telling me my efficiency was only at 63%...

I didn't stir the grain a whole lot...I know it was all soaked really well, but I only stirred the grain periodically. Are you supposed to really get in there and work it around after the 70 min. mash once you put the flame back on to get to 170F mash out???

I'm still a noob, so any help is appreciated.

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Old 12-06-2010, 10:50 AM   #4
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I don't stir my grain a lot and average about 78% with BIAB. I'd suspect your pH or other issues with that gravity, or maybe you just had a load of doughballs that didn't get worked out.

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Old 12-06-2010, 10:52 AM   #5
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Stirring and getting the whole grain bed to 170 will thin the sugars and help in extraction.
I wouldn't worry about the raise to 180. BIAB will typically give you an efficiency in the 65% range.
Bull

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Old 12-06-2010, 11:23 AM   #6
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Quote:
Originally Posted by bullinachinashop View Post
Stirring and getting the whole grain bed to 170 will thin the sugars and help in extraction.
I wouldn't worry about the raise to 180. BIAB will typically give you an efficiency in the 65% range.
Bull
It's nothing unusual to have efficiencies over 75% with BIAB, I dunno where people are getting the idea that it's low efficiency.
www.biabrewer.info over 80% is also quite common.
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Old 12-06-2010, 11:40 AM   #7
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Quote:
Originally Posted by EoinMag View Post
It's nothing unusual to have efficiencies over 75% with BIAB, I dunno where people are getting the idea that it's low efficiency.
www.biabrewer.info over 80% is also quite common.
I wasn't saying that you can't get better efficiencies rather that is more common (especially for a new brewer) to get less efficiency than other methods.

Friday I got 87% from a fly sparge but that doesn't represent the averages.


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Old 12-06-2010, 01:53 PM   #8
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Hey - its sounds like you think BIAB is inferior in some way - it isn't - I get at least 70% efficiency and sometimes a lot more. Its a great way to brew IMHO.

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Old 12-06-2010, 02:09 PM   #9
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Quote:
Originally Posted by simco999 View Post
Hey - its sounds like you think BIAB is inferior in some way - it isn't - I get at least 70% efficiency and sometimes a lot more. Its a great way to brew IMHO.
Agreed. I just switched from the batch/sparge cooler method to a BIAB using a keggle. To me it makes my brewday so much easier and I have less stuff to worry about/clean. I've done 2 batches so far this way and each time I hit mid 70s for my efficiency. The nice thing with BIAB is that you can go with a finer crush, since you don't have to worry about stuck sparges. I also do a mashout at the end to help boost the efficiency a bit.
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Old 12-07-2010, 12:56 AM   #10
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thanks guys,

I think double milling and more thorough stirring will probably be able to get me into the 70's percentage wise...I hope.

I still might do the additional gallon of rinse water since I was a little more than a gallon short on my volume anyway...I can always boil off more if I need to.

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