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Old 02-02-2013, 12:22 AM   #1
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Default Acetobacter?

First I'd like to say if this thread is in the wrong section I apologize and thank any moderator that does me the favor of moving it.

Went to cold crash a Belgian specialty beer tonight (wlp500) and found this floating on top. I've seen it on a two saisons I have made and assumed it was just the yeast because the beer tasted fine. So does this beer but I'm starting to see a disturbing trend. This one tastes fine as well. Cold crashing now and will bottle next week.

Acetobacter? Should I dump all my plastic stuff? I do a bleach bomb fairly regular (since the last time I saw this). Bleach and pray perhaps?

Thanks in advance for all advice/input.

image-3267126208.jpg   image-463846296.jpg  
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Old 02-02-2013, 12:33 AM   #2
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I would say it is unlikely Acetobacter if you are not tasting or smelling vinegar. There are many things that could grow as a pellicle in that fashion, yeast included. It could be something that will make your beer cloudy but you will never taste. The same thing happened to me on a few saisons as well. Bleach always seems drastic, but do what you gotta do.

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Old 02-02-2013, 12:42 AM   #3
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I don't think acetobacter can form a pellicle on beer. Pellicles are often referenced as being a protective barrier against acetobacter, formed in repsonse to oxygen. I'd be concerned if I had 3 sacc only beers form pellicles. All 3 in the same fermenter? Looks like a green bucket from your pics?

Looks cool whatvere it is. If it tastes good, drink it!

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Old 02-02-2013, 01:43 AM   #4
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Quote:
Originally Posted by TNGabe View Post
I don't think acetobacter can form a pellicle on beer. Pellicles are often referenced as being a protective barrier against acetobacter, formed in repsonse to oxygen. I'd be concerned if I had 3 sacc only beers form pellicles. All 3 in the same fermenter? Looks like a green bucket from your pics?

Looks cool whatvere it is. If it tastes good, drink it!
After the first time I saw it I marked the original bucket and used it for another saison. Figured it's almost appropriate to the style to have some random funk going on. After the second time I saw it I threw the bucket out. This is a different bucket.

This bucket didn't have a good seal (no airlock bubbling). I let it ride because it was a session recipe and would only ferment a week or so and then into the secondary. Got the flu and it went three weeks..... So yeah it most likely got exposed to oxegen. Could that have caused the yeast to form a layer of pellicles?
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Old 02-02-2013, 01:45 AM   #5
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If by yeast you mean brett, then yes. I don't think sacc ever forms a pellicle.

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Old 02-02-2013, 01:53 AM   #6
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Is it the same yeast; that is, have you re-used it? If so, it is probably in the yeast. I don't remember WLP500 doing that to me.

If the beer tastes fine, keep the beer. Probably some form of Lacto or Pedio; both will take a long time to show up.

Acetobacter will give you vinegar flavor very quickly. If you don't taste vinegar, then that is not it.

How do you bleach your plastics? Too high a concentration is bad. You only need about a tablespoon of bleach per gallon. Also, bleach is not instant, if you really want to clean it, leave it filled with bleach for a week. It takes time for the bleach to permeate into all the scratches.

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Old 02-02-2013, 01:54 AM   #7
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Does it taste like vinegar? If so, you may have the beginning stages of acetobacter. If it is, take it out, put it in some leftover light ale, let it sit and pour your malt vinegar over your fish and chips

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Old 02-02-2013, 01:55 AM   #8
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its deffinitely not acetobacter. it looks to be either brett or lacto. the white bubbles look like brett but the white little streaks looks kinda like lacto. its an infection of some sort. personally, i would just ride it out and see how it ends up tasting.

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Old 02-02-2013, 02:56 AM   #9
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Does not taste like vinegar. Tastes fine. I pitched a new vile into a starter so it wasn't contaminated from improper washing. I thought I might have had brett the two times before but it has never effected the finished product (at least obviously). Could this be something random and some what benign?

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Old 02-02-2013, 03:01 AM   #10
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Quote:
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How do you bleach your plastics?
Tablespoon to a gallon. Procedure: Fill the five gallon bucket with water, place all to be bombed in the bucket,Add five tablespoons of bleach, place lid on the bucket and see bleach water come from the hole for the bung on top (and cover the top), Let sit 1 week.
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