8/31/2023 0 Comments Cider nottingham yeast slowSo, what is it? In the parlance of microbiologists, it is a biofilm. If you are a brewer that leans toward the funky end of the spectrum (you brew with Brettanomyces or lactic acid bacteria), you probably have seen a pellicle forming in your fermenter. You can use google to find all the permutations a pellicle can take. I’ve included a few photos of pellicles from my own fermentations found in various places within this blog. I’ve seen ones that are slimy looking or looks like small dry patches of while floating on top of beer. ![]() It can also appear ropey or like a spider web. It can appear to be uneven or appear to have “bubbles” in it. What is a pellicle?Ī pellicle is the term brewer’s use for the layer that forms on top of the wort / beer in the fermenter (liquid-air interface). I will edit the article and give you credit for the edit. Whenever I publish one of these someone comes along and fills in important gaps I’ve left. Any comments, additions or corrections, leave a comment at the bottom. As with all my science posts, I hope you find this helpful or interesting, otherwise there will be a saison post in a few days for your digestion. This post is going to be about pellicles, what causes them, what organisms can make them, and what exactly they are and possibly their function. A large portion of this blog is dedicated to my own homebrew efforts but sprinkled throughout are articles like this one, where I isolate a biological or chemical aspect of the beer and explain it and if possible analyze it myself. and have been brewing for over 10 years at this point. I am a microbiologist by trade, I have a Ph.D.
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