brewbama
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Pardon me if this has been answered before, if it has I overlooked it In my search.
When beer ferments, it is in a closed system expelling CO2 from an airlock of some sort. When that airlock is broken (say I pull the blow off tube out of the liquid solution in a jar) and the spigot at the bottom of the fermenter is opened, as the beer fills a CO2 purged keg it pulls air thru the tube into the headspace of the fermenter. This air mixes with the CO2 and begins to oxidize the beer. Here’s the question(s):
Is the top layer oxidize slightly at first, then gradually more and more saturated and begins to slowly work its way lower and lower into the beer? If so, how long does this take? Filling a keg with 5 gallons takes about 15 minute. If the fermenter was filled to 5.5 gallons will the oxygen have reached the half gallon depth (or more) in that 15 minutes or is the underlying 5 gal of beer protected by this top sacrificial half gallon layer resulting in a keg filled with near zero O2 beer?
When beer ferments, it is in a closed system expelling CO2 from an airlock of some sort. When that airlock is broken (say I pull the blow off tube out of the liquid solution in a jar) and the spigot at the bottom of the fermenter is opened, as the beer fills a CO2 purged keg it pulls air thru the tube into the headspace of the fermenter. This air mixes with the CO2 and begins to oxidize the beer. Here’s the question(s):
Is the top layer oxidize slightly at first, then gradually more and more saturated and begins to slowly work its way lower and lower into the beer? If so, how long does this take? Filling a keg with 5 gallons takes about 15 minute. If the fermenter was filled to 5.5 gallons will the oxygen have reached the half gallon depth (or more) in that 15 minutes or is the underlying 5 gal of beer protected by this top sacrificial half gallon layer resulting in a keg filled with near zero O2 beer?