Dry Hopping Foam Back-up Airlock
#1
Posted 21 November 2009 - 08:12 AM
#2
Posted 21 November 2009 - 08:37 AM
#3
Posted 21 November 2009 - 09:08 AM
I'm pretty sure fermentation was done- it was 6 weeks after brewing that this event occurred (though I didn't check FG since it was a routine batch I'd brewed a dozen+ times before). I think you're right- I highly doubt it was fermentation (unless it was from bad organisms vice yeast) and it was likely a result of the binding agents used to make the hop plugs releasing gas as they broke down. Since I didn't have enough head-space, it foamed until the lock was plugged creating back pressure and trapping the gas. Since the beer was likely already saturated with CO2 for the given Temp and pressure, the gasses had no where to go hence the action seen in the carboy. I found it interesting nonetheless.I have often dry hopped a lot of beers that I have brewed APA and IPA too. I believe what may have occurred is that nucleation site idea. I forget the principle behind it but I have heard of that. I think its like it kicked up your beer a bit. I figure after 3 weeks primary your fermentation is done. Did you verify if your FG changed after you added the hops? I would not expect there to have been any further fermentation after the hop addition though. At least you got it in a keg and if it taste good then all the better. Prost.
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