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Possibility of monitoring beer haze with static light scattering, a theoretical background
T. Teumer, M. Rdle and F.-J. Methner

In the process engineering sub-steps of beer production, turbidity formation occurs during the brewing process. There may be several reasons for this, such as the precipitation of dissolved substances during the brewing process. However, it can also be caused by equipment malfunctions, for example malfunctions in filtration. This review examines what types of turbidity are present in beer, their origins and how they are currently measured. In order to better understand the process of turbidity, the physical meaning of turbidity will be highlighted. For this purpose, the scattering behaviour of a light beam hitting a particle will be explained. This is supplemented by a presentation of common measuring methods of such disperse-phase systems, which show how the particle size or particle size distribution can be determined and, if possible, also how to provide information about the particle composition. The focus is on static scatter measurement methods.

Descriptors: Beer, haze, static light scattering, optical measurement

BrewingScience, 72 (Juli/August 2019), pp. 132-140