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Old 09-12-2012, 09:36 PM   #1
TheCarnie
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Default Making your own CO2

So since the price of refilling my 5lb tank has risen to nearly $30, I was thinking of trying to capture the co2 from fermentation and use it to carb and dispense. I figure I could dedicate one of my corny kegs as a closed fermenter with the gas tube connected to a low pressure regulator, and connected to my kegs of beer after that. I figured this would be a simple experiment that could pay off well.
So any ideas or critiques would be appreciated.

Edit: I see some potential dangers with this, but I could use a fermentable simple syrup in order to prevent kraussen and potential clogs that could be linked with that.


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Old 09-12-2012, 09:43 PM   #2
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Capture, refine, compress, store.

Only cost the likes of Sierra Nevada hundreds of thousands to implement.

CO2 reclamation for Brewing Industry.


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Old 09-12-2012, 09:52 PM   #3
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My main question is what is your plan on getting it compressed?
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Old 09-12-2012, 09:55 PM   #4
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No need to compress, I'm talking low pressure. Less than 100psi before a regulator, and fermentation will do to compress that. I'm thinking that would suffice to serve a keg at 10psi.
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Old 09-12-2012, 10:00 PM   #5
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I'm not sure that a normal ferm creates a very high pressure.
What pressure can it make?
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Old 09-12-2012, 10:01 PM   #6
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Quote:
Originally Posted by GilaMinumBeer View Post
Capture, refine, compress, store.

Only cost the likes of Sierra Nevada hundreds of thousands to implement.

CO2 reclamation for Brewing Industry.
+1

IF it was easy as the OP wants, then you'd see tons of homebrew supply stores selling kits to do it.

You need to remove all O2 from the gas (to a level of <.1%) before using it. Otherwise, you'll oxidize your beer with it. Plus, you want to filter out the aromas that are kicked out during fermentation.

You might want to look into fermenting under pressure to at least partially carbonate your brew before going to serving keg.
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Old 09-12-2012, 10:02 PM   #7
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Holy crap. $30? I just filled mine month ago for like $10.
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Old 09-12-2012, 10:05 PM   #8
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Interesting idea ... although I question whether it would actually be cost effective, and whether your yeast would survive to continue producing CO2.

To carb and dispense a keg, you'd have to use quite a bit of sugar. While cheaper than brew, it aint free. Plus, you have the PITA factor of doing this for every keg you want to carb/dispense and not knowing if your yeast will survive the high alcohol content of the fermentor, and soon that $30 would seem like a bargain, if only for the convenience.

... That being said, I'm curious how much CO2 would actually be produced by a simple sugar fermentor.
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Old 09-12-2012, 10:05 PM   #9
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Quote:
Originally Posted by LoneWolfPR View Post
Holy crap. $30? I just filled mine month ago for like $10.
I think the OP needs to find another place to get his CO2 tanks filled up. Even the places that swap them out, in my area, don't charge that much. I can get my tanks filled for far less too. In line with the $10 for a 5# tank. Of course, the larger your tank, the lower the cost is per pound of CO2 (or how it appears). Such as $12 for a 10# tank. Or $17 for a 20# tank.

Look to places that also service fire extinguishers since they [often] have the means to fill CO2 tanks.
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Old 09-12-2012, 10:07 PM   #10
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Hmm, never thought of this. Interesting enough concept but will it work?


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