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Old 03-27-2012, 05:49 AM   #1
kickrjason
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Default Contaminated Fermentation?

I checked on my batch of hefe this afternoon. I found a bunch of white spots floating on the surface. When I popped the airlock to look/smell I snapped a quick pic. It has a bit of a sulphery smell mixed in with the usual banana notes.

Since this is only my 6th batch of beer this isn't something I have run into before. They appear to clusters of tiny bubbles. Will these drop out like krausen when fermentation is complete? This is a standard extract hefe recipe from northern brewer brewed on march 20th. High krausen has already come and gone.

What am I looking at here? (and don't say beer!)

image-571094420.jpg   image-439937905.jpg  
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Old 03-27-2012, 05:56 AM   #2
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Yeast rafts. In other words, soon to be beer!

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Old 03-27-2012, 01:23 PM   #3
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I thought that was a possibility. Is there anything that leads to the formation of them? This is my third batch of hefe with the same recipe so I'm just curious if I did something.

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Old 03-27-2012, 02:09 PM   #4
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This was a giant yeast raft of some weizen yeast. The article it came from states that the beer turned out JUST fine. If this is OK, your small rafts are OK

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Old 03-27-2012, 02:53 PM   #5
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Yup thats all i needed to see to put my mind at ease!

Last thing i want to do is throw a batch of beer! i was thinking last night that if it is funky id run off and get some brett and pitch that, sit on it for a lot longer and see.

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Old 03-27-2012, 02:59 PM   #6
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BTW, sulfur is a pretty common aroma produced during fermentation, especially for wheat beers. Nothing to worry about.

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Old 03-28-2012, 06:37 PM   #7
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So do I wait for the little cakes to fall like krausen?

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Old 03-28-2012, 06:43 PM   #8
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PS - that's one dark looking hefe

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Old 03-28-2012, 06:49 PM   #9
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Pics are from my iPhone. The flash inside of my ferm chamber = poorly exposed photo.

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