To increase the efficiency of crossflow filtration, MAHLE InnoWa GmbH relies on turbidity sensors from Anderson-Negele for automatic filter monitoring.
MAHLE InnoWa develops and produces wine and fruit juice filtration systems that meet high quality and reliability requirements. The crossflow filtration method, which is also known as tangential flow filtration, is used to filter liquids such as those used in the food industry, for example by wine and fruit juice producers. The advantage of this filtration method is that the tangential flow across the filter medium delays the formation of a filter cake.
The crossflow filtration system in the microfiltration range is used to remove trub, colloidal solids and yeasts. It can be employed in various stages of wine preparation – for example in the cellar filtration during maturation or in the filtration prior to bottling.
In crossflow filtration with hollow fibers, the suspension being filtered is pumped into the interior of the hollow fibers and a portion of it is drawn off via the sleeve surface of the hollow fiber membrane in a direction perpendicular to the flow. The rest circulates as a concentrate and is returned to the hollow fiber module, until it likewise leaves the system as filtrate. The resulting filtrate is clear and free of solids. Microbiological stability is achieved at this point.