Never ending pressurised CO2 supply?

[stan.distortion]

What if you mixed up a cheap as chips brew, probably just sugary water and yeast and let it do it's thing in a pressure vessel, maybe something like a food grade plastic weed sprayer with a relief valve... would it be enough to run something like a corny keg? Someone had mentioned trying to capture CO2 from fermentation a while back but it only just dawned on me it doesn't cost a whole lot to make the stuff.

 

[Bigcol49]

Hi!
There's a thread from Another Place about this - post No. 5 is interesting.
https://www.homebrewtalk.com/forum/threads/homemade-co2-production.17297/

 

[stan.distortion]

Thanks :) Post 15 is interesting too, seems 35psi is about the limit. I'm guessing that's plenty for pouring but would it be enough for carbonating? Temperature is mentioned in another of the posts and there might be something interesting in it, controlling the temp of the fermentation vessel to wake the yeast up or put it to sleep as needed.

Seems the stuff released besides C02 may be an issue though, might be another dynamic for tweaking but probably not.

EDIT: A thread linked in that post is making a good read:
http://www.brewboard.com/index.php?showtopic=7848&st=0
That Oldfart dude is a nutter Good idea there on using mains water pressure to pressurise a tank of CO2, just fill it from the overflow from regular beer fermentation and a sight tube to stand 30psi or so wouldn't be hard to make up to avoid overflows.

 

[Ghillie]

Thanks :) Post 15 is interesting too, seems 35psi is about the limit. I'm guessing that's plenty for pouring but would it be enough for carbonating?

You could fully carb a beer in 24 hours with 35PSI. If the beer you're carbonating is cold enough, you'd be amazed at just how quick the CO2 is absorbed into solution.

Those who "set and forget" force carb their beers can go as low as 10PSI for a couple of weeks.