Harvesting Commercial Yeast from Keg

[Stretch1991]

So being a bartender at a big Taphouse I'm constantly getting to the bottom of certain kegs and it's just a yeast pour of sludge. Today that happened with stone brewing tangerine express, but instead of dumping it like usual I was hit with inspiration

Could I use this to grow whatever strain of yeast they used? I enjoy this beer and want to fool around with this.

Could I pitch this sludge into a starter and let it grow? Or does stone pasturize and kill the yeast?

 

[Stretch1991]

Well I went for it anyways, I let it chill in my fridge to separate the yeast slurry from the beer.

I then made a starter at about 1.030 with light dme and mixed them together in a mason jar and covered with foil. I don't have a stir plate but it's worth the shot in the dark

 

[Gnomebrewer]

Yep, it's worth a go. They are very unlikely to be pasteurising - not many breweries do that anymore. Worst case it's just trub and nothing grows.