My first all grain experiment with BIAB

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captainjay

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A couple of nights ago I attempted my first all-grain batch... Because I haven't got the ball-valve plumbing sorted out for my cooler mash tun, I decided to go the brew-in-a-bag (BIAB) route. I've read a lot of posts about it, and it seemed like others have had some success with it...

So with my brand-new digital thermometer from Canadian Tire in hand ($10 on sale!) I took my freshly milled grains for a little 2.5 gallon batch and began... Based on some of the calcs I've seen other people use for this process, I started with about 4 gallons of water. Everything seems right in the world.

I deviated from traditional wisdom in a couple of instances, however, and was wondering what I should expect as a result....

ISSUE #1: I couldn't find a 5 gallon paint strainer bag to use, so I used three 1 gallon bags,suspended like tea bags in the pot. I stirred a number of times and tried to ensure there was a little circulation between the bags as best I could. Could this still be a problem?

ISSUE #2: Because there were 3 feet of snow outside, I figured that would be the easiest way to cool the wort... So with my handy-dandy digital thermometer from Canadian Tire, I went out into the snow. The temperature seemed to drop pretty quick, then stall around 90 degrees. Half an hour later I realized something was up, so I brought it inside and used a traditional thermometer - the temp fell below 50 degrees! Grrr, my digital thermometer lied to me! So I heated the batch up on the stove to get it up to 65 or 70 degrees before pitching the yeast. Is this a danger? Have I killed my beer?

In less than 24 hrs my airlock is bubbling away in the basement, so I don't seem to have surprised the yeast too badly. The OG (at 65 degrees or so) was about 1.056, a little higher than I expected but I guess not a huge concern. I am also slightly concerned about infection from the snow... While I was in the snow bank it started to snow. I had the lid on, but I'm not 100% sure a few flakes didn't make it in.

Overall a fun brew day experiment! I would like to try BIAB again, but with a proper bag. I got my wife a sewing machine for X-Mas, so I'll have to get her to sew me up a proper bag.

Jay
 
I wouldn't worry about over cooling and then reheating the beer will taste great. Here is a link to a bigger bag: EZ Strainer Paint Strainers

I've never used it so be carefull and support the bottom so it doesn't tear when you lift it out of the wort
 
As long as you were able to maintain your mash temp in the pot and were able to get enough circulation through the grains, you should be fine. Cooling in the snow is handy (done it a few times) but you do risk infection. If you can fit the pot in the sink and fill it with snow, that might be a way to control it. (You'll have to refill the sink quite often, so a bucket with snow on hand and an ice scoop might work). A bigger bag is the way to go, but be sure you clean and sanitize the crap out of it, I shuddered when I smelled the chemicals on the last bag I got. Also, a colander on the bottom of the bag to support it will help keep it from ripping when you pull it up.

Good job, and let us know how it comes out!
 
So with my handy-dandy digital thermometer from Canadian Tire, I went out into the snow. The temperature seemed to drop pretty quick, then stall around 90 degrees. Half an hour later I realized something was up, so I brought it inside and used a traditional thermometer - the temp fell below 50 degrees! Grrr, my digital thermometer lied to me! So I heated the batch up on the stove to get it up to 65 or 70 degrees before pitching the yeast. Is this a danger? Have I killed my beer?

Heating it up on the stove isn't an issue, but if your thermometer was wrong, what temp did you mash at? If your thermometer was also reading high at mash temps, you may end up with a very thin, dry beer.
 
Heating it up on the stove isn't an issue, but if your thermometer was wrong, what temp did you mash at? If your thermometer was also reading high at mash temps, you may end up with a very thin, dry beer.

Hmmm, I hadn't thought of that... I figured the thermometer crapped out during the temperature drop, but you're right - I may have been getting false readings all along.

I will be sure to follow up with the results. In the meantime, I'm going to be shopping for a hardier digital thermometer!

Jay
 
Could the temp suprise just be because you didn't stir the wort and it only read at one spot. Once you moved it and it mixed up the temp stabilized? Just a thought.

I always grab my IC and move it around in a gentle circle to move the wort around and it cools much quicker..
 
Could the temp suprise just be because you didn't stir the wort and it only read at one spot. Once you moved it and it mixed up the temp stabilized? Just a thought.

I always grab my IC and move it around in a gentle circle to move the wort around and it cools much quicker..

I wouldn't think a 2-3 gallon pot could have a 40 degree hot spot, though I've been wrong before.

I've had themometers get stuck going up or coming down... if you tap the face and it jumps to the correct temp, then it probably just stuck coming down, and was fine at the higher temps.

I just ordered a 19.99 digital thermometer from Northernbrewer so that I can RDW.
 
I have several digital thermometers, a multimeter with a thermocouple and the only thermometer that I own even when all are calibrated that is consistently correct is the $6 glass one from the brew store. Advice: Don't trust 'em 'till you test 'em. Especially the cheap digital ones.
 
i find the floating glass thermometers work the best. i even use them in my keggles, in conjunction with the metal ones installed on the unit. just don't break them in the beer ;)

sounds like you had a pretty good brew day. i wouldn't worry about the beer at this point. your mash temps were probably fine...i'd say your thermometer froze outside.
:mug:
 
I moved it into a 3 gal carboy for secondary fermentation last weekend, since I didn't have time to bottle. It smelled pretty good, much better than my last batch.

The OG was around 1.058 and the gravity when I moved it to the secondary was around 1.012, I think.

Can't wait to try it!
Jay
 
Finally got around to bottling this puppy, priming with white table sugar. I thought about using brown sugar (might be nice in a stout?) but didn't want to screw up the measurements in a batch this size.

I took a taste - taste very nice! I forgot to take a FG reading, though. D'oh!

Can't wait to taste a bottle... It's going to be hard to give this one a couple of weeks...

Jay
 
Finally tried a bottle of this all-grain stout on the weekend, two weeks after bottling.

WOW!

I was really impressed. It was delicious! Now I regret only doing 2.5 gallons - this won't last long at all!

I can really see the difference from using all grain to extract. The all-grain had such a nice flavour, it was wonderful. The BIAB technique seems to have worked out really well for me, too. I don't think I'll be able to do a 5 gallon BIAB batch until the Summer when I can brew outdoors, just not enough space in the kitchen, but I look forward to doing more of it!

Thanks to everyone whose posts have helped me so much!
Jay
:mug:
 
The brew in a bag method really interests me. I've got a 5 gal cooler and some 5 gal paint bags now, plus an 18" x 34" "course" straining back from Northern Brewer. Do the paint bags do a good enough job of filtering the wort from the mash? Or do you need to do a re-circulation to clear out the junk?

Also, I keep seeing posts about doing Single Infusion mashing with a double batch sparge (half your sparge once, then the other half separately). This seems simple and effective.
 
The brew in a bag method really interests me. I've got a 5 gal cooler and some 5 gal paint bags now, plus an 18" x 34" "course" straining back from Northern Brewer. Do the paint bags do a good enough job of filtering the wort from the mash? Or do you need to do a re-circulation to clear out the junk?

Also, I keep seeing posts about doing Single Infusion mashing with a double batch sparge (half your sparge once, then the other half separately). This seems simple and effective.

This is exactly how I brew. My eff is right around 70% right now, which isn't too bad. Honestly the only thing you have to worry about with this approach is cleaning the bag well after you're done.
 
Cleaning the bag:

1. Turn it inside out
2. Spray out whatever gunk you can
3. Let it hang some where overnight where it can drip and dry
4. knock off the dust that dries on the bag.

Cleaning those bags is incredibly easy.
 
Cleaning the bag:

1. Turn it inside out
2. Spray out whatever gunk you can
3. Let it hang some where overnight where it can drip and dry
4. knock off the dust that dries on the bag.

Cleaning those bags is incredibly easy.
Now that I've seen it written down, that looks so damn obvious it hurts. In fact, I think it's too obvious. Which is obviously why I never thought of it before. :D Thanks for the tip!
 
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