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Old 10-13-2012, 05:34 AM   #991
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Sid, Watched your video, very nicely done. I do the same except I use two bags, mashout at 170-175 deg and then sparge in about 2 gallons of 175 deg water (my hose water is pretty nasty). In the end I take my bags of grain and drop them into a bucket with holes in the bottom which is suspended inside another bucket and I push to squeeze the xs wort out. Together the first wort, the sparge water and the squeezings make up my full volume. Probably no necessity to mash out but that is the proceedure I have come up with and its working well for me. Also, regular old large black binder clips from an office supply fit great over the upper ring of the keggle. Thanks for your ideas.

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Old 10-13-2012, 08:02 AM   #992
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Default An unscientific experiment

There has been a bunch of back and forth lately about squeezing the grain bag and weather it's worth the effort. So the other day I did a brew and took careful notes.
This is what I came up with.

4.43 lbs of grain mashed in 1.5 gallons in my 5 gallon Colman cooler.
From this I got 1.2 gallons from just the dripping w/a brix of 18.5 (1.073)
Squeezed another 0.1 gallon w/a brix of 20 (1.079)
-----------------------------------------------------------------
That gave me 1.3 gallons w/a brix of 19 (1.075)
-----------------------------------------------------------------
Put bag back in cooler and slowly added 1.5 gallons of water at 170*
This gave me an aditional 1.4 gallons w/a brix of 5 (1.0168)
Squeezed another 0.1 gallons w/a brix of 12 (1.045)
-----------------------------------------------------------------------------------
That gave me a total of 1.8 gallons w/a brix of 12.8 (1.049) pre-boil
------------------------------------------------------------------------------------
I was supprised that I got back the whole 1.5 gallons of sparge water.
Then it hit me. The grain was saturated with 0.2 gallons of water from the mash
So it could not absorbe any of the sparge water and it all came out in the squeeze.
----------------------------------------------------------------------
Post boil volume was 2.15 gallons w/a brix of 16.2 (1.063)
--------------------------------------------------------------------------
I've done this brew twice before w/o sparge but always boiled down to about 1.8 gallons which gave me a brix of about 18 (1.071). Less liquid/same grain higher SG
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So it looks like sparging or rinsing did little except take time and effort.
Since I squeezed all three times I can't compare squeezing or not but...
It looks like my sparge/rinse was a waist of time and effort.
--------------------------------------------------------------------------
But I think the squeeze is needed to get the volume of wort needed. If not
I'd have to add more grain which means more money and since I'm retired
I have more time than money so I'll continue to squeeze and eliminate the sparge
--------------------------------------------------------------------------

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Old 10-13-2012, 03:26 PM   #993
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Hello C-Rider, Great job, Thanks.

Cheers

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Old 10-13-2012, 03:55 PM   #994
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Hello marshallwms, That makes perfect sense.

Thanks

Cheers

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Old 10-13-2012, 04:00 PM   #995
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Hello sidbedi, Great idea splitting up the grain, making it easily manageable for one person is awesome.

Nice video bu the way.

Cheers

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Old 10-13-2012, 04:30 PM   #996
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I've been searching the forum to see if anyone has successfully done a 10 gallon BIAB? I'm going to set up a pulley system to handle the weight of the bag.
My concern is whether my 20 gallon boilermaker will hold the grain bill and water? I'm also thinking of using the hop blocker at the bottom....using a tapered bag from Jeff Omundsun. Another thought is to go partial mash....grain for five gallons and extract for the rest. Any thoughts?

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Old 10-13-2012, 10:32 PM   #997
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Quote:
Originally Posted by mnmatt View Post
I've been searching the forum to see if anyone has successfully done a 10 gallon BIAB? I'm going to set up a pulley system to handle the weight of the bag.
My concern is whether my 20 gallon boilermaker will hold the grain bill and water? I'm also thinking of using the hop blocker at the bottom....using a tapered bag from Jeff Omundsun. Another thought is to go partial mash....grain for five gallons and extract for the rest. Any thoughts?
Didn't sidbedi just cover that in his video?
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Old 10-14-2012, 02:39 AM   #998
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My bad. I posted while on a connection that wouldn't support streaming video - checking it out now.

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Old 10-14-2012, 07:55 AM   #999
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1.st post from Finnish lurker , my 2 cents:

If you squeeze grain bag you waste less wort in grains.
That means that you can use less water overall and still get amount of pre boil wort you want.

Because you can use less water, wort is less diluted and SG is higher, and that means you can use little bit less grains to get same SG than without squeezing, and you get efficieny gain !

Squeezing works same way than batch sparging. When you do batch sparge you dilute wort that is remaining in grains, so you waste less of it. When you squeeze, the wort remaining in grains is still stronger stuff, but you waste much less of it.

EDIT: I noticed that by squeezing I actually do not mean really "squeezing" , but letting wort drip out of bag somehow. I have not actually measured how much more wort is removed from grains if I really squeeze bag vs I just let it hang and drip slowly on top of kettle.

Here Iam mashing 5gal's of 1.100 Barley Wine, total efficiency according to Beersmith2 was 70%, it is enough for me, did not do batch sparge :


Brew kettle (50l) has 3000w custom made immersion element and it is controlled with arduino based control box. Software is home made (Iam SW engineer), DS18S20 digital temperature sensor monitoring wort temperature and cheap chinese pump doing wort circulation. Out of picture is winch which Iam using to lift grain bag out of kettle. Iam very happy with this setup, works excellently.

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Old 10-15-2012, 04:37 AM   #1000
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Quote:
Originally Posted by mnmatt
I've been searching the forum to see if anyone has successfully done a 10 gallon BIAB? I'm going to set up a pulley system to handle the weight of the bag.
My concern is whether my 20 gallon boilermaker will hold the grain bill and water? I'm also thinking of using the hop blocker at the bottom....using a tapered bag from Jeff Omundsun. Another thought is to go partial mash....grain for five gallons and extract for the rest. Any thoughts?
My friend and I have cranked out quite a number of 10 gallon BIAB batches in a 20 gallon Boilermaker. Works great. We don't use the hop blocker but we do keep the false bottom in to filter out the break and hops.
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