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Old 08-25-2009, 01:46 AM   #1
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Default Photo Album -- Australian Method -- Brew In A Bag

I posted this in the Michigan Mashers section and Revvy suggested I post it over here too. I will post it in the Beginners' section as it may be a lower cost way to get into all-grain brewing for those of you presently using extract.

I recently scored some great garage sale finds and needed to give them a workout, so I tested them with a couple of experiments. I tried the Australian method of Brew In A Bag (BIAB) and also did a wet hopping.

Some of the advantages of BIAB are:
Low equipment cost -- only one kettle and a bag
Shorter brew time -- no sparge
Less to clean up

Some of the disadvantages:
Efficiency loss without sparge (somewhat offset by use of a finer crush, mash out, and long drain and squeeze of bag)
Effectively limited to 5-gallon batches
High liquid to grist ratio -- not appropriate for some recipes
Step mash becomes more of a ramp mash


Here are some pictures of my BIAB day.

Picasa Web Albums - Gary - BIAB Day

If you want to learn more, check out Aussie Brewer. There are some very innovative brewers down under and they have been extremely cordial and helpful to me.

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Old 08-25-2009, 01:52 AM   #2
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I was actually wanting to try this method after BYO did a writeup on it a few issues ago.

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Old 08-25-2009, 01:57 AM   #3
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cool pics, thanks for sharing... how was it trying to maintain mash temp with a burner? or were you able to not turn it back on?

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Old 08-25-2009, 02:25 AM   #4
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I have one question... how in the hell did you get a medical oxygen container... esp. one that still has some O2 left in it?

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Old 08-25-2009, 02:30 AM   #5
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Quote:
Originally Posted by android View Post
cool pics, thanks for sharing... how was it trying to maintain mash temp with a burner? or were you able to not turn it back on?

I turned the burner on twice very briefly.
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Old 08-25-2009, 02:31 AM   #6
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Quote:
Originally Posted by Vuarra View Post
I have one question... how in the hell did you get a medical oxygen container... esp. one that still has some O2 left in it?
a ten dollar bill (and going to many a sale)
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Old 01-30-2012, 11:27 PM   #7
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So finer crush of grains is necessity? Why only 5 gallon batch. I saw some one on the net make a 6-6.5 gallon batch.

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Old 01-31-2012, 12:27 AM   #8
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Quote:
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So finer crush of grains is necessity? Why only 5 gallon batch. I saw some one on the net make a 6-6.5 gallon batch.
A finer crush isn't necessary.....as long as you are willing to accept a lower efficiency. Traditional mash tuns have a limit to how fine of material they can have without it clogging up the screen. You may see references to a stuck sparge. With that limit the water can't get to the middle of the larger particles so they don't fully convert and their efficiency suffers for that. BIAB has a tremendous filter area comparatively so the stuck sparge isn't a problem (most don't even sparge because they can squeeze the wort out) thus allowing a finer particle which gets higher efficiency. There isn't a theoretical limit on the size of batch you can make; in fact some are doing 10 gallon batches but at some point you have to lift the bag of grains and it gets pretty heavy. The practical limit is when you are trying to lift the bag of grain to let it drain and the seam rips open, dropping your grain back into the kettle.
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