Filtrationsschwierigkeiten sind von einer Reihe unerwünschter Erscheinungen begleitet. In der Reihenfolge ihrer wirtschaftlichen Bedeutung handelt es sich dabei um höheren Bierschwand, größeren Verbrauch an Kieselgur und Filterschichten, mehr Personalkosten, größeren Bedarf an Wasser, Wärme und Strom sowie höhere Abwasserbelastung.
Determination of the filterability is performed by filtering beer through a membrane filter under constant pressure. This allows a prediction of the filtration properties of beer and is quite meaningful in the review of measures to improve the filterability. The volume of the filtrate exiting the filter in the process is determined over time.
Beer
Beer chilled to 0 °C is filtered through a membrane filter at that temperature under constant pressure. The amount of filtrate is recorded periodically during filtration. The amount of filtrate is used as the basis for a characteristic number, which serves as a comparison of the filterability of the sample.