Sixmilecross
Well-Known Member
Something has been plaguing a few of my batches and I have no idea what the problem is. 3 of my last six or seven batches have all kicked off with great fermentation and no signs of contamination - no white bubbly filmy "skin" on top but healthy looking/smelling krausen. The first time this happened, I was bottling, while the next 2 were kegged. The first time the beer went into the bottles what I thought looked relatively clear but came out cloudy and stinking of pineapple, and the taste was sourish. The second time it came out the keg smelling and tasting the same, and the third time I could distinctly smell pineapple when opening the fermentor and it seems to be developing the same taste as it sits in the keg.
So I consulted the pdf at more beer and right away it says the smell of pineapple is a result of oxidation. Sounds cut and dry except this doesn't make sense give the circumstances, ie the beer smelled like pineapple prior to racking to the keg, which means it would have had to occur sometime between pitching the yeast and kegging....but aerating the wort prior to pitching is necessary and doesn't cause these kinds of problems. So what could it be?
I'm thinking it may just be something with the fermentor, but I'm surprised that there have been no signs of infection and all fermentations have smelled great. It could be the tubing, but then other batches that I've brewed would also have been contaminated.
Any help is much appreciated!
So I consulted the pdf at more beer and right away it says the smell of pineapple is a result of oxidation. Sounds cut and dry except this doesn't make sense give the circumstances, ie the beer smelled like pineapple prior to racking to the keg, which means it would have had to occur sometime between pitching the yeast and kegging....but aerating the wort prior to pitching is necessary and doesn't cause these kinds of problems. So what could it be?
I'm thinking it may just be something with the fermentor, but I'm surprised that there have been no signs of infection and all fermentations have smelled great. It could be the tubing, but then other batches that I've brewed would also have been contaminated.
Any help is much appreciated!