Wild fermentations

When you are working with interesting hand-gathered ingredients, you might get some ride-alongs. At least that’s what happened in a secondary fermentation involving some wild local fruits that we gathered. We ended up with a really nice, if unwelcome, pellicle on this homebrew prototype recipe. This sucker was so eager to get into the beer, we figured why not oblige it? So now we’ve harvested it and brought it into our culture collection as Aeronaut’s first wild yeast strain.

A wild yeast pellicle grows on our wheat beer.
A wild yeast pellicle grows on a prototype wheat beer.

We isolated the strain and then took a closer look. These are some handsome yeast cells! Probably Brettanomyces/Dekkera. They give off a really nice aroma when we grow them in flasks. We can’t wait to see what kinds of beers they can produce.

Aeronaut's first wild yeast strain. Image taken using differential interference contrast imaging.
Aeronaut’s first wild yeast strain. Image taken using differential interference contrast imaging.
Aeronaut's wild yeast. Image taken using transmitted light.
Aeronaut’s wild yeast. Image taken using transmitted light.