In the filtering process of beer, wine, fruit juices and other beverages, diaphragm metering pumps are used for metering filter aids in the fluid. The pumps are in continuous operation and all installations must conform to strict hygiene standards.
With LEWA ecodos or LEWA ecodos sanitary/hygienic pumps, kieselguhr suspensions are metered during precoat filtration to separate undesirable substances from the fluid.
For metering filter aids during filtration, the LEWA ecodos sanitary/hygienic design is an optimum solution, because it is designed for handling diatomite suspensions.
How are filter aids metered in the beverage industry?
Before the bottling, beverages like beer, wine or fruit juices have to be filtered, which means, undesired solids have to be separated from the fluid. For successful filtration, a filter aid is needed. An example for such a filter aid is kieselguhr, which filters out yeast and protein components of high molecular weight. The filtration process begins with a precoating of the filter plates.
A consistently distributed kieselguhr suspension is metered into a water flow or directly into the product. From then, kieselguhr has to be added constantly, so that the filter cake remains porous. Because of the added filter aid, the filter cake grows continuously and increases the filter depth. If enough kieselguhr is dosed, the lifetime of the filter can be optimized.
The ecodos® mechanical diaphragm metering pump from LEWA is suitable for all pumping and metering tasks in the low-pressure range.
The LEWA ecodos® diaphragm metering pump with its sanitary/hygienic design is the ideal pump for food and pharmaceutical products in the low-pressure range.
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