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WitSok
10/14/10 07:43 PM  
My Berliner Weisse in Producing Flamable Gas!
Okay my no boil BW has been in the fermenter for 10 days. Yesterday a new fermentation seems to have started. The krausen is made of thin large bubbles. The bubble are coming through the airlock. The foam has a mucus like viscosity and kind of stringy. It doesn't have a pleasent aroma. The strange thing is when I cleaned the air lock and the top of the carboy, I gave it a quick flame. I did not use any alcohol in the cleaning. Well the krausen burns. The flame move down into the carboy and continues to burn until it snuffed itself. Any idea what is going on here?
jbkinn
10/14/10 09:06 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
holy moly it's a good thing there was no explosion! did you notice the color of the flame?
WitSok
10/14/10 09:13 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
The flame was blue.
Ryane
10/14/10 11:40 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
I would love some of the culture!

Ive been researching an old beer style called uytzet, and one of the more interesting things about the beer was that you could ignite the gas coming off of it and it would burn blue!

Im guessing that hydrogen is being produced in excess and the other bugs in the culture arent utilizing it as fast as it is produced?

brewinhard
10/15/10 06:30 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
Hydrogen sulfide? Does it smell like rotten eggs?
WitSok
10/15/10 10:10 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
I haven't notice H2S. I've had that with some of my wines. The krausen had a cheesey aroma with mild vomit notes. Yet the aroma from the carboy was more fruity and sour, the vomity notes were not really present. Perhaps outside the airlock exposure to oxygen contributed to the difference in aroma. I spoke to a friend who works with some chemists, they think it is hydrogen from acid fermentation. That does make some sense. Perhaps the blue color would be from other gases mixed in plus the krausen.
sl8w
10/15/10 10:57 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
I have nothing to add to the conversation, other than to say that I, like Ryane, wouldn't mind having some of that culture. Something about beer catching on fire, cheese aroma and vomit notes really sounds delicious!
WitSok
10/16/10 09:32 AM  
Re: My Berliner Weisse in Producing Flamable Gas!
Ryane and sl8w, if your on the MoreBeer social networking site, you can PM your address and I can see about sending you some of the slurry. I have a case of 50 ml sterile vials that I can package it in.

http://morebeer.ning.com/profile/DanMorey

ryane
10/16/10 01:51 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
witscock, I just signed up on morebeer, I would really appreciate some of the slurry

hopefully i can return the favor somehow

brewinhard
10/17/10 02:56 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
funny, how art mimics life. Made a no boil BW last Thursday with the WY berliner blend and mine also has the funky rotten egg sulfur smell. I will not be lighting mine on fire though...ha ha
WitSok
10/27/10 05:35 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
Three vials of the no boil slurry remaining.
Rob B
10/27/10 07:38 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
I would like some...I just sent you a message through MoreBeer!
jaymo
10/28/10 03:04 AM  
Re: My Berliner Weisse in Producing Flamable Gas!
A friend of mine brewed a no-boil BW and then chucked a handful of grain into the primary after not seeing much activity over the first couple days. In the end it got nicely sour, but had vomit notes in the aroma (not the taste though.) At first it was really offputting, but over the course of several months the vomit character subsided little by little.

We've repitched that slurry twice now and neither of these subsequent generations of BW have had the vomit smell. It was theorized in another post here on BBB that the vomit aroma was due to butyric acid produced by enteric bacteria. These bacteria would then have been killed off by the low pH in the original batch. Thus, no vomit character in later batches. I'm curious how yours will act when repitched as well.

smellysell
10/29/10 08:05 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
When you repitch the cakes from your berliners, do you do a no boil again?
jaymo
10/30/10 04:10 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
No boils for any of the 3 so far. #2 & 3 aren't nearly as sour as the first one yet (just tried #2 last night, since it was just bottled) but #3 has some funky post-primary activity going on right now, so I'm going to leave it in the carboy for awhile.
sl8w
10/30/10 05:44 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
The brewing literature and the conventional wisdom on the internet would suggest that successive uses of a bw cake would lead to more and more sourness. While this has generally been my experience with flanders, lambics, brett beers, etc., my experience with berliner weisses have been quite the opposite. That is, all 3 times I've tried to re-use a berliner weiss cake, the subsequent batch has been less sour than the first. I can only guess that by the time berliner weiss fermentation is complete, the lacto have either gone dormant, or the number of yeast cells greatly outnumber the lacto. Whatever it is, I no longer re-use my cakes, but instead start new ones each time.
brewinhard
10/30/10 06:43 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
sl8w-

I have experienced the same with repitching BW cakes as well. My guess too is that the saccharomyces present simply out-reproduce the bacteria and quickly ferment the wort instead of allowing the lacto its turn on the delicious wort. Either way, I have repitched and simply augmented with sour dregs after fermentation is complete for long term aging with great success. Blending acidic fruits (apricots, sour cherries, peaches, etc) with a BW is always a good option to increase the sourness and get an interesting take on a fruit beer in the process.

sl8w
10/30/10 08:30 PM  
Re: My Berliner Weisse in Producing Flamable Gas!
Yeah, I guess I should have said that IF I want another berliner weiss, I start with fresh lacto and yeast each time. The three times I re-used the cake, I added fruit. They were great, which is why I did it three times, rather than stopping after the first.
 
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