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Old 12-18-2013, 12:54 AM   #1
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Default Powdery Materials

Could anyone help me diagnose what this powdery material might be at the top of the funnel separator?

I made a batch of IPA using WY1217 (West Coast IPA) and wanted to start some slants from it. Obviously, I had already brewed and should have started with the original stuff but...

After racking the beer from the primary, and adding about a gallon of cooled, boiled H2O to the primary, I filled this conical funnel separator. After about a week, I had just found some Agar Agar and made my starter tubes. I pulled some of the yeast from the conical and made the slants. About 3 days later, I noticed this powdery material at the top of the conical. And low and behold the same powdery white material showed up in my slants.

Has anyone else seen this and if so, have you an idea what it might be? Is it nothing to worry about or should I take a small dose and skip the flu shot this year ?

http://www.homebrewtalk.com/photo/wh...-be-61630.html

Thanks, BB

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Old 12-18-2013, 02:15 PM   #2
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Are you describing what looks to be growing on the glass, just beneath the foil?

Mold is usually described as powdery. Those slants are a no-go if they are contaminated.

I had a batch with some mold and I could taste it, it was very apparent. Have you sampled it?

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Old 12-19-2013, 03:27 AM   #3
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Yes, I am talking about what is growing on the top of the glass. Didn't think I wanted to taste it but ...

As far as the slants go, can this be cleaned and then re-autoclaved?

Thanks,
BB

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Old 12-19-2013, 08:23 PM   #4
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Quote:
Originally Posted by bbbrew View Post
Yes, I am talking about what is growing on the top of the glass. Didn't think I wanted to taste it but ...

As far as the slants go, can this be cleaned and then re-autoclaved?

Thanks,
BB
Autoclave, or a pressure canner, ought to take care of anything that is left behind
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Old 12-23-2013, 10:40 PM   #5
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I took a sample of this powdery stuff and put it in the scanning electron microscope to see what it looked like. Can any of you organic people able to tell me what this stuff is?

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