How much CO2 is produced during fermentation?

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Gnomebrewer

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I came up with 22.3 moles of CO2 for a 20 L batch, with slightly different assumptions than yours. Both ways get a decent ballpark number.
So that's about 25 moles of CO2 for a 22L batch. +/- 20% of each other is close. A fair chunk of that would be taken up by me assuming a 1.010FG, when in reality it was probably more like 1.015. That's 10% of my calculation straight up.
 

hottpeper13

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Too bad we can't go to the hardware store and purchase a MOLE trap to store the extra CO2 in! ;)
 

McMullan

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Too bad we can't go to the hardware store and purchase a MOLE trap to store the extra CO2 in! ;)
Get at least a couple to store all the carbon based biomass produced during a good fermentation.
 
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Wables

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If you strung together 2 or 3 kegs on a 30 psi fermentation, you would have plenty of CO2 to run your keggerator, and the beer would already be carbonated.
 

renstyle

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While I am resurrecting an old thread, it's to give thanks.

I just started a dark mild fermenting in a keg, and have a serving keg freshly cleaned and sanitized, but used the sanitizer during the mild brew day.

Armed with the knowledge of this thread and the quoted "Keg Purging..." I am confident that my current batch could easily purge my eventual serving keg to O2 levels in the low PPB range over the course of a normal (non-spunded) fermentation.

It saved me from a wee bit of work, as well as some tank CO2 once I realized if I hooked this up right away my serving keg we would be ready to roll once we hit FG.

I ran a line from the gas OUT on the serving keg to a bubbler on my workbench. It's nice to see things working.. remotely LOL.
 
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