HOMEBREW Digest #198 Tue 11 July 1989

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		Rob Gardner, Digest Coordinator

  Roto-Keg, Martin (David Carter)
  Freezing yeast cultures (Richard Hargan)

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---------------------------------------------------------------------- Date: Mon, 10 Jul 89 13:45:05 EDT From: davidc at northstar3.Dartmouth.EDU (David Carter) Subject: Roto-Keg, Martin To Martin who is interested in round plastic kegs: I lost your address. If you could send it to me I'll get you the info you're looking for on the Roto-Keg system. david.carter at dartmouth.edu Return to table of contents
Date: Mon, 10 Jul 89 15:51:36 EDT From: Richard Hargan <HARGAN at UMDD.UMD.EDU> Subject: Freezing yeast cultures Shortly after switching from dry yeast to Wyeast liquid yeast, I decided that I needed to find a way to get more than one batch of beer from a single package of Wyeast. I recently bought a product called a "yeast bank" which will, hopefully, allow me to freeze samples of liquid yeast to be used at a later date. After starting up the Wyeast sample, I pitched it into a gallon jug containing about a quart of sterile wort. When the fermentation was well under way I shook-up the jug to suspend the yeast and removed some of the solution to several culture tubes supplied with the kit. The remaining solution was pitched into 5 gallons of wort I had previously prepared. Following the instructions in the kit, I refrigerated the culture tubes and allowed the yeast (and anything else in suspension) to settle. I then decanted the liquid and added something they call "freeze shield". The culture tubes are then place in the freezer for future use. Now for my question. Does anyone know what this "freeze shield" actually is, and can it be purchased at a reasonable price uder a different name? One person suggested to me that is was probably glycerine. Does anyone have any experience with this product? If I can get a half dozen batches of beer out of one package of Wyeast, then I will contine to use it, but at $4.00 a pop liquid yeast seems a little expensive for one 5 gallon batch of beer. Thanks for your help. Return to table of contents
Richard B. Hargan hargan at umdd.umd.edu Systems Programmer Room 1309 (301) 454-2946 Computer Science Center University of Maryland College Park, MD 20742-2411 Return to table of contents
End of HOMEBREW Digest #198, 07/11/89
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