First batch BIAB

Post #1 made 14 years ago
So thanks to BIAB (and this forum!), I did my first AG brewing! :thumbs:

I'm doing a kind of mini-BIAB, since I have a 27 liters pot and I'm brewing on my kitchen stove (with a 3 rings, 3300 KW burner). Medium-BIAB? :)

My first recipe was based on the "all amarillo" APA for mini-biab. I used MO as base malt and 13,5 % of aroma 150 brown, with the same hopping and US-05 yeast.

All went quite well, except for the very long time needed (8 hours from crushing the grains to cleaning the kitchen!).
I've got little different figures from what expected by the Calculator, but I think it's OK:
Expected start of boil gravity: 1,036 - actual: 1,041
Expected start of boil volume: 19,86 - actual: 21
Expected end of boil gravity (OG): 1,052 - actual: 1,048
Expected end of boil volume: 13,86 - actual: 16
Expected volume into fermenter: 11,88 - actual: 13

It seems that I've got a better extraction (EOB efficiency 84,2%) and a lower evaporation than expexted. And a lot of trub in the kettle to be left behind...

Anyway, now is sitting into fermenter at 19° C, I'll let you know how it'll turn out! :peace:
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Post #2 made 14 years ago
Congrats on your first BIAB brew Zelig.

The thing with home brewing is that everybody has a different system or method, hence why many people say you need to do at least 5 brews to get some sort of average with your numbers.

It all sounds like you have done very well for your first go, 84.2% is not to be sneezed at, along with an extra 1.2 litres of beer to enjoy :)

Well done.
"It's beer Jim, but not as we know it."

Post #3 made 14 years ago
Thank you hashie.
I hope the beer will be very good, because compared to extract brewing it takes 3 more hours to make 10 lts less! :)
I think I'll try to make a little higher gravity wort and then dilute with 3 or 4 lts of water into fermenter.
Have to study maxi-biab calculator!
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Post #4 made 14 years ago
Just to let you know that I've tasted the beer after 1 and half months from bottling, and it's really good! :thumbs:
Meanwhile I've done another 2 batches, and after all I realized it's not so bad to make small batches because this way I can do more different beers and get more experience, without havig to get drunk every day to finish the stocks! ;)
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Post #5 made 14 years ago
Congrats man. Sounds tasty. Looking forward to my first BIAB. As far as brew-day-time goes, you'll hone that down as you develop your own technique and refine the choreography.

Post #6 made 14 years ago
Really sorry Zelig that I missed your first and subsequent posts here until now.

You did really well on your figures for a mini-BIAB :thumbs:. 1.052 versus 1.048 is an excellent margin of error and there are many things that could explain this.

I am really pleased to see you took so many measurements :thumbs:. It makes things much faster to fine-tune.

I can't comment on the figures from a single brew as there are so many variables. What I will say, is that evaporation rate is the first thing to concentrate on. It is the only figure that a new all-grainer can fine-tune fairly quickly.

The second area (even more important that evaporation) is efficiency into kettle (EIK) and all software, including the Calculator, gives no help in this area :angry:. (There is good news though - see below!)

Efficiency into Kettle (EIK) and therefore all other 'efficiency' figures vary with the original gravity you require. If we exaggerate a little bit, you obviously won't get the same 'efficiency' for a very high OG beer as compared to a 'low alcohol' beer because the former is getting just a 'spray' of water compared to the latter's 'soaking'.

This is a major, major flaw in all software including The Calculator. This flaw in all the software 'teaches' the user (and everyone who posts) that efficiency is a constant.

Efficiency of any kind is not a constant. It is a actually a complex variable.

The good news is that the 'BIABacus' (the new calculator for this site) will address this basic flaw.*

I really enjoy reading threads like yours. I don't think I have ever seen a new brewer take so many measurements. Taking as many measurements as is practical avoids or quickly rectifies the problems listed here.

And, it also means that you are paying attention to your brew. Paying attention, I think, is the fastest way to learn. Taking measurements is a good indication that you are doing the 'paying'.

My apologies that I didn't see your original post until now Zelig.

Great job :champ:,
PP

* Stux has done hours of study and research on this. Sigurdur is now trying to write it into the new BIABacus.
Last edited by PistolPatch on 20 Dec 2011, 20:46, edited 5 times in total.
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Post #7 made 14 years ago
Thank you PistolPatch.
I think that measurements are very important in AG brewing, and it's not so much effort doing, so why not? :)

In my second batch (an irish red ale, Kilkenny clone) I did a mess while squeezing the bag. It fells into the pot and splashed some wort all over the kitchen, maybe one liter, I don't know... Anyway I got almost the right figures (OG 1,042 - expected 1,044 - and the right volume into fermentor).

The third one (a recipe I've put together by myself) was almost perfect. First, it takes 2 hours less than the first one, and that's very good for me! And I get exactly the OG and volume expected too! :cool:

The strange thing is that the final figures are right, but every time I've got wrong ones at the start of boil. But I don't care too much to be honest... ;)
And I don't care about efficiency too. Of course it's important to know it, so you can calculate properly the recipe, but I believe that for an homebrewer it's not a problem if it's a little low. It can be compensated with just a few more grains, and grains are not so expensive! :)

And of course I can't wait to put my hand on the BIABacus!!! :pray:
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Post #8 made 14 years ago
I think you have exactly the right attitude zelig :peace:. One of the most important things about taking measurements is that it helps you develop a good 'disrespect' for them as well :P. While this seems contradictory, it gets you focussing faster on the more important things. (Glad I haven't had a beer tonight otherwise this would become a rambling and probably very boring essay - lol!)

That is excellent you put a recipe together yourself. Was it :yum:?

:peace:
PP
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Post #9 made 14 years ago
I'll let you know, it's still fermenting!

My recipe was:

2,5 Kg Maris Otter
0,4 Kg Special B
0,3 Kg Oat malt
30 g EKG for bittering only (the calculator says 20 IBUs)
US-04 yeast
mashed around 66 C
fermenting at 19 C

what do you think? :)
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