The Application and Process Key Points of Membrane Filtration Technology in Beer Brewing

In beer manufacturing, membrane filtration technology is primarily used to remove yeast and other microorganisms, ensuring the sterility of the final product. The commonly used microporous membrane pore sizes range from 1.2 microns to 0.6 microns, selected based on specific needs to filter out bacteria while retaining the original flavor of the beer. Compared to traditional heat sterilization, this method operates at room temperature, which helps maintain the colloidal stability and foam characteristics of the beer, avoiding the flavor loss and nutrient destruction caused by high-temperature treatment, and reducing energy consumption and production costs.

Key Steps in Beer Membrane Filtration Process

1. Pretreatment and Cleaning
   The assembled membrane filtration unit must first undergo sterilization with hot water, be rinsed with sterile water filtered through a 0.45-micron microporous membrane, or use CO₂ gas to displace the sterilizing water, ensuring a sterile environment.

2. Pressure Testing
   The integrity of the membrane is tested by applying pressure, with specific maximum allowable pressure differences corresponding to different pore sizes. If the pressure exceeds the limit, the membrane should be checked for damage.

3. Graded Filtration
   The beer first undergoes preliminary filtration through a centrifuge or diatomaceous earth filter, followed by fine filtration through a membrane filter to ensure sterility before entering the bright beer tank

4. Filtration Termination and Protection
   At the end of the process, the beer supply should be cut off before shutting down the machine to prevent impurity infiltration. The entire process must maintain sterile conditions, with particular attention to the cleanliness of water, CO₂, and air contact points.

5. System Regeneration and Maintenance
   After the production cycle, execute a CIP cleaning program to clean and disinfect the system. Use CO₂ back pressure to maintain system seal integrity and prevent external contamination.

6. Environmental Control and Aseptic Filling
   Ensure good filterability of the beer, maintain a highly clean production environment, and meet strict aseptic standards for the filling and capping stages.

Membrane filtration, Beer Brewing, BMembrane filtration technology,pressure difference, concentration difference,

Membrane filtration, Beer Brewing, BMembrane filtration technology,pressure difference, concentration difference,

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