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Gravity Dispense - O2 vs. CO2

Posted by Nick B. on 2014-08-04 23:16:55

With kegs though, you have CO2 pumping the beer out and replacing it, so that oxygen (or rather, natural ambient air) does not affect the beer. CO2 "preserves" the beer. With a bayerisch Anstich / gravity barrel (or real ale cask), you have ambient air with oxygen replacing the beer. It appears that this will have negative effects on "dead" lager even after one night of exposure, whereas "living" real ale continues to produce its own CO2 to protect it from the oxygen. I imagine one could inject CO2 into an opened gravity barrel to protect the beer if one wanted to save it for later use....? Or one could use a "cask breather" so that CO2 replaces the beer volume in bayerisch Anstich barrels, just like they are sometimes used with real ale casks in the UK, right? (This CAMRA member would not object!)

Followups:

Gravity Dispense - O2 vs. CO2 by Mosquit on  2014-08-05 00:08:12

Gravity Dispense - O2 vs. CO2 by Barry on  2014-08-05 01:26:02

Gravity Dispense - O2 vs. CO2 by mike004 on  2014-08-05 02:53:51

Gravity Dispense - O2 vs. CO2 by Barry on  2014-08-05 03:22:48

Gravity Dispense - O2 vs. CO2 by mike004 on  2014-08-05 03:43:24

Gravity Dispense - O2 vs. CO2 -- Where is Jos B.? by Nick B. on  2014-08-05 04:56:08

Gravity Dispense - O2 vs. CO2 -- Where is Jos B.? by Barry on  2014-08-05 08:01:20

Witzgall Keller by Mark Andersen on  2014-08-05 13:24:07

Witzgall Keller by Nick B. on  2014-08-06 01:57:26

Witzgall Keller by Mosquit on  2014-08-11 00:06:57

Witzgall Keller by Nick B. on  2014-08-11 03:08:43

Witzgall Keller by Mosquit on  2014-08-11 03:15:42

Witzgall Keller by Nick B. on  2014-08-11 23:45:58

Witzgall Landbier by Mosquit on  2014-08-12 00:13:40