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Trying to capture wild yeast (discuss.tchncs.de)
submitted 6 months ago by to c/homebrewing@sopuli.xyz
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Soaked some decomposing oak leaves for 36 hours in preboiled water with some yeast flakes. Stirred, put 1-2 ml into test tubes with 5 ml of malt beer ("Karamalz", I just picked a random brand), filled up with equal amounts of 5 % vinegar and whisky (didn’t have any vodka at hand). Put a thin layer of neutral vegetable oil on top.

Should keep out the vast majority of bad microbes and provide a mostly oxygen free environment for yeast.

IIRC, I’ve also read on suigeneris brewing that oak leaf litter has a 50 - 80 % chance of catching bretanomyce, which I’d be thrilled to find.

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[–] [S] 2 points 6 months ago (2 children)

I'll probably do that as well at some point. In my research though, I've come across the suspicion that hops would hinder the growth of Brettanomyces, so I deliberately left them out here. For whom it may concern, here is one of my sources: https://www.youtube.com/watch?v=G2nhUM5PIrg

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