@Sequel
I just found this website about washing and reusing the yeast from your beer for the next batches.
https://homebrewacademy.com/yeast-washing/
Another site (
https://cooking.stackexchange.com/questions/34558/how-can-i-make-nutritional-yeast) led me to find the link about washing your yeast for reuse.
There is a great comment on that second link that explains how to make "nutritional" or brewers yeast, from the gunk, or "trub", as I've learned its technical name. (Since I feel confident from my research they are indeed the same thing.)
The first comment explains how to culture the yeast, but if you're brewing, you've already got the yeast cultured. To harvest the yeast, siphon off the beer from the trub in the primary ferment stage, add a gallon of boiled, then cooled, water and shake it up well. You then let it sit, article says about 20 minutes, and the trub will settle on the very bottom, with a layer of milky white on top. That milky stuff is your yeast!!
You'll want to carefully pour the yeast off into another sterile container, add some more boiled, then cooled, water, and repeat the shake and wait steps. This helps to "purify" your yeast and remove even more of the "trub", which give the yeast the bitter flavor. (The bitterness comes from the hops I believe I read, removing all that particulate removes the bitterness.)
Now here, to make the yeast edible, you pour off the yeast and let it settle. Siphon off as much water as possible, pour the yeast out on sterilized foil in a pan. Bake it in the oven on low heat until its dried out completely. This baking process kills off the live yeast and makes it safe for consumption.
If you were reusing this yeast for your next batch of beer, you would skip the baking process and store it in a sealed jar in the refrigerator.
Baking the yeast seems to be a very important part of the process. Idk what happens when you eat live yeast the way you would nutritional yeast, but I'm guessing the results aren't pleasant....
I believe someone mentioned earlier they think a centrifuge might be necessary. While it can be used to hasten the process of removing the heavier trub from the lighter yeast, and may provide a purer end product, it is no way a necessity, more of a convenience!
