What you see here is the result of yeast washing. Liquid yeast is fairly expensive, about $8 per vial. So it makes sense to reuse yeast multiple times. What I've done here is washing yeast, i.e. collecting the yeast from a primary fermenter after racking to a secondary fermenter or after bottling. Basically, you rinse the yeast cake in the bottom of the fermenter with water (pre-boiled and brought back to room temperature) and then separate the trub (the dead yeast cells and other unwanted particles) and living yeast cells by decanting into jars. You can see the yeast cells on the bottom of the jar. There might be as many as 100 billion cells in that slurry!
What I've learned from Brülosophy is that there's a far easier method: make a yeast starter with the liquid yeast and add an additional 500 ml of starter. Before pitching the yeast in the fermenter with the wort, collect the 500 ml in a separate jar.
The yeast collect here is Trappist WLP500, ideal for making tripel-style beers!
What I've learned from Brülosophy is that there's a far easier method: make a yeast starter with the liquid yeast and add an additional 500 ml of starter. Before pitching the yeast in the fermenter with the wort, collect the 500 ml in a separate jar.
The yeast collect here is Trappist WLP500, ideal for making tripel-style beers!