Yeast Harvesting: A Novel Approach?

I began washing and harvesting my own yeast about a year ago. I got excited and harvested 4 jars from 4 batches in the first month, leaving me with 16 jars of 4 different yeasts. Since I usually brew twice per month, I had a ton of yeast just sitting in my fridge. After using some of this stored (aka old) yeast in beers that came out less than perfect, I began tossing it – hours of work, down the drain. Then I had an idea – why can’t I just harvest clean yeast directly from my starter? After trying out a few techniques, here’s the process that seems most efficient:

Step 1: Make a starter (3 days prior to brewing) that is .5 liter larger than you need for your beer. Since the majority of 5 gallon batches require no more than a 1 liter starter, a standard 2000 mL flask or even gallon growler will work great. In the photo below, I needed a 2 L starter for a 10 gallon batch, so I made 2.5 L.

Yeast Harvesting: A Novel Approach? - Brulosopher - 1-232.jpg

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