Saving CO2?

[ssashton]

After a keg is empty, it is of course full of CO2 at a reasonable pressure.

Any tips on saving this somehow?

Seems a shame to let it all out, but of course the keg needs to be opened for cleaning.

 

[Drunkula]

Purge another keg with it.
Use it to fill a bag / foil ballon than you can attach to a fermenter's airlock when you cold crash so it doesn't suck in air.

 

[ssashton]

Ahh a foil balloon! I had considered a balloon but knew it would leak.

I could purge another keg... if I had more than one empty at a time, lol. I've got to keep rusty turnaround going!

I have an air compressor... maybe I could find a way to feed the co2 to the inlet and pressurise another container with it?? Even a little 12v car tyre indicator might work.

 

[Ghillie]

Purge another keg with it.
Use it to fill a bag / foil ballon than you can attach to a fermenter's airlock when you cold crash so it doesn't suck in air.

Genius. I've never heard or read this suggested anywhere else before!

 

[foxy]

Don't use the air compressor, not only will you be getting air in with the co2 but oil and water. Use the co2 from the next ferment to push the co2 into the next keg or more daisy chained together.
Assuming you have a way of collecting the co2 from your fermenter.

Genius. I've never heard or read this suggested anywhere else before!

Coffin dodger wrote up a detailed post about capturing the co2. I think it was called Noddy to the rescue.( he used a foil balloon with Noddy on it)