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Application practice of filtration membrane in beer factory

Microporous membrane filtration principle: The use of biological and chemical stability of synthetic fibers and plastic materials made of porous film as the filter medium, the application of microporous membrane filtration to remove the gas phase or liquid phase substances in bacteria, yeast and other microorganisms, small particles and colloidal particles process.

According to the different classification of the medium phase

Gas filtration: polluted gas becomes dry after passing through the filter; For gas, mechanical blocking or screening directly intercepts particles with a diameter of 1 micron or larger, particles with an inertial impact of 0.3*1.0 micron, particles with a Brownian motion below 0.3 micron, etc.

Liquid filtration: Polluted liquid after the filter into a clean liquid, filter interception, adsorption retention, inertial collision, electrostatic action.

According to the removal of impurities characteristics of different filter material selection principle: if the removal of more than 40 microns of naked eye visible impurities, choose the relative accuracy of 5 microns filter membrane: if the removal of fog, suspended impurities, then choose the absolute accuracy of 1-3 microns or relative accuracy of 0.5 microns filter membrane; If remove bacteria, then choose the absolute accuracy of 0.20-0.45 micron or 0.1 micron filter membrane: if remove microplasma bacteria, then choose the absolute accuracy of 0.1 micron, positive charge filter membrane; If the pyrogen endotoxin is removed, the positive charge filter material and ultrafiltration membrane are selected: if the protein is removed, it is filtered after heating; If the ester is removed, the first cooling after filtration: if the glial components are removed, the first should be placed after filtration, the selection of positive charge filter material, the absolute accuracy of 0.2 micron filter film.

The factors to be considered in the selection of filters include: chemical adaptability to filter products: chelation reaction, unit flow rate, total amount of filtration, batch filtration or continuous filtration; The influence of the material released from the filter material on the product quality; The influence of filter material shedding fine debris: impurity characteristics, content, whether absolute filter is needed; Filtration temperature and sterilization methods: safety and health requirements

Membrane filtration aperture is divided into relative accuracy and absolute accuracy: under normal circumstances, the relative accuracy interception rate is about 80%, and the absolute accuracy interception rate is as high as 99.99%, or higher: pre-filtration, the relative accuracy of membrane aperture is generally within the range of 0.65-1.20 microns, and the final filtration, the absolute accuracy of membrane is below 0.45 microns.

Gas film filtration, generally using the absolute accuracy of 0.2 micron filter film:

ClP (in situ cleaning system) with hot water, cold water, lye, acid, disinfectant, using a relative accuracy of 1.2 micron filter membrane;

Filtration of draft beer, generally using 2 relative precision O.65 micro

M pre-filtration membrane and two final filtration membranes with absolute accuracy of 0.45 micron are composed of two groups; There is also a single set of single filter system, that is, the use of absolute precision 0.45 micron final filter membrane group form.


Post time: Aug-29-2022