7 Month Old beer creating tons of Co2

[qgriffith]

I brewed a Honey Basil beer about 7 months ago. It aged for 2 months in the secondary before I kegged it. SInce then it has been sitting in the basement. I finally put it in the keg fridge 2 days ago. I went to sample it today to see how it was doing. I got a huge glass of foam so I blew off all the Co2 and let it rest a few hours. I do not have the gas line hooked up. When I went back to get a sample, I was still getting foam, and the keg had a ton of pressure built back up, with out the gas line hooked up. So I blew off all the gas again and took off the keg lid and foam starting pouring out of the keg. I have never seen this before, not sure what is going on. Anyone else seen this or know of a way I can salvage?

 

[onthekeg]

You had it overcarbed. Keep letting off the pressure and eventually it will be right.

 

[homebeerbrewer]

Did you check the gravity before kegging? I had one do that once. The gravity was a little high, but stayed the same when I checked it a few days before kegging, and the day I kegged it, so I thought it was finished. It apparently started fermenting in the keg, and built up a lot of pressure. Took me over a week of purging the keg every day before it settled down.

 

[qgriffith]

Sadly I didn't check the gravity before kegging I figured after two months it would be all through. The yeast was Wyeast Belgium Sassion. I took it out of the fridge about 40 mins ago, and now that the beer has warmed up a bit in the keg, it isn't creating over flowing foam, and the Co2 creation has dropped dramatically. Not sure why the beer getting warmer is making it calm down.

 

[onthekeg]

When it gets warmer the co2 comes out of the liquid into the airspace at the top of the keg.

 

[qgriffith]

Ok thanks everyone for your replies, I will just keep on venting it every day till it calms down! Odd I didn't even add any priming sugar when I kegged it. I aged the beer for 2 months, kegged it and pumped 30 PSI into the keg, and let it sit for around 7 months in the basement which is around 65 degrees.