yeast washing with star san

Mon Oct 09, 2006 3:48 pm

I had a vile of white labs dry English ale yeast. I pitched the tube into starter the day of.

I looked at the vile and noticed some residual yeast in the vial. I put it in the fridge for a day. I then thought of Justin's Star San beer and Charlie Talley indicating that the yeast probably would have fermented a Star San beer.... So I figured, what the heck. This is the first time I've used Star San, I made 5 gallons.... Why not put some Star San in the vile, shake it up, and store it in the fridge until I decide what to do with it later. About a week later, I pitched this very small amount of yeast (yeast had settled), after decanting the star san, into a 300 milliliter wort that was shaken a few times the first day. After 4-5 days, I have a noticeable clumps of yeast, and the wort smells like it is giving off CO2. Does anyone have any insight as to if using Star San is good for washing the yeast:

Am I killing the bacteria and keeping the yeast viable enough to build up in starters? If so, I was wondering if it were possible to wash the yeast 3 times with Star San (as discribed on one of the yeast sites) from primary to get a clean sample of yeast sitting in star san to use for my next batch. Any thoughts would be appreciated. Maybe this has already been done before.
bubba
 
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Thu Oct 12, 2006 2:03 pm

its all going to depend on the pH of the solution, for washing yeast phos acid is best, and the ph needs to be around 2, but if it sits there for longer than 2 hours its going to cause problems

Make a gallon or so and see what happens
Thank God All Mighty For Titties and Beer
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