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Old 02-29-2008, 03:06 AM   #1
Cos
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Default Yeast washing

Everything I've read says to boil your quart jars, lids, etc for 15 minutes. Why not just use sanitizer?

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Old 02-29-2008, 03:09 AM   #2
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Sanitizer doesn't kill wild yeast spores.

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Old 02-29-2008, 03:28 AM   #3
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I think sanitizer would kill wild yeast (not sure about the "spores" part). I only know that I tried to "Acid wash" yeast one time and managed to kill them all very quickly with the usual mixture of star-san. This was a mistake but thankfully I had more yeast from that batch that I just washed the usual way.

Yeast can survive lower PH than bacteria, but even they have their limits.


From the description of star-san

Quote:
Star San is a flavorless, odorless, no-rinse food grade sanitizer. When used according to directions, Star San will completely eliminate all microorganisms that it comes into contact with by lowering the pH to a level that will destroy them quickly (5 minutes), and foams to sanitize cracks, crevices and other 'impossible' places in your equipment. Once fresh wort/must is added to your fermenter the pH will quickly rise to a level that is not only safe for yeast, but sometimes beneficial, making Star-san a true no-rinse sanitizer.
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Old 02-29-2008, 04:49 AM   #4
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I've only ever used Starsan on my washed yeast containers...

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Old 02-29-2008, 05:33 AM   #5
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Sanitizer doesn't get rid of the oxygen in the water. Get rid of the oxygen,the yeast go dormant.

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Old 02-29-2008, 12:30 PM   #6
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When yeast washing you need to be as sanitary as possible, even more so than when doing regular brewing. Starsan is great stuff, and excellent for brewing, but boiling is still better.

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Old 02-29-2008, 12:34 PM   #7
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When I'm readying my canning jars for washing, I boil them mainly because I know that it will kill all the nastys, and it's not that much more work. Plus, you know they'll be clean as a whistle that way.

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Old 02-29-2008, 06:07 PM   #8
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Actually, boilling for 15 is great, but presure cooking for 15 at 15 PSI is better. The reason for either is not only to kill wild yeast, but other more hardy bacteria that will screw with your cultures. The more sterile you can get the better off you are. Sanitizer is good, and bleach is better at killing nasties but they still do not leave a sterile enviroment for your yeast. End of story.

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Old 03-02-2008, 01:53 PM   #9
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how about an oxyclean/sanitizer double punch?

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Old 03-02-2008, 02:24 PM   #10
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Quote:
Originally Posted by homebrewer_99
I've only ever used Starsan on my washed yeast containers...
ditto. star-san the jars/lids. but I do use boiled/cooled water to pour into primary/wash the yeast.

but I'm not bothering with pressure cooking the jars.

zero problems thus far with 4 of the 5 Kolsch jars I washed the first time.
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