If there are scratches, replace the vessel. If you ferment in a plastic bucket, ensure there are no scratches in the plastic, as they may harbor bugs. Usually, this is the result of yeast colonies being carried to the top of the beer from the trub or yeast cake by CO2, although in some cases, it can be a sign of a bacterial or wild yeast infection. Scrub all equipment thoroughly with cleaner, and sanitize carefully before brewing again. Particle orientation is also typical for a wheel-thrown pot, as the wheel rotation and hand pressure orient the particles. 2.15) 11, 143.The replacements are specially within the octahedral layer (Mg 2 +, Fe 2 +) and to a much lesser degree between the silicate layer (Al 3 +/Si 4 +). If the beer does smell/taste sour, then unfortunately, your beer has become infected. Bentonite is an important impure clay, aluminum phyllosilicate adsorbent, usually contains montmorillonite with structure a gibbsite layer placed between silica layers to produce the structural unit (Fig. They may persist until you rack the beer, but should settle upon racking, and will not affect the smell, taste, or appearance of your final carbonated beer. If not, you just have rogue colonies of yeast on your beer. If you can't smell anything unusual, give it a taste. Swirl it in a glass and see if it smells funky or infected. Usually, this is the result of yeast colonies being carried to the top of the beer from the trub or yeast cake by CO2, although in some cases, it can be a sign of a bacterial or wild yeast infection. It often happens in secondary, or in primary after the krausen falls.ĭon't worry - your beer is probably fine! White film or flakes on top of beer is fairly common.