Ceramic Membrane Filtration for Fermented Malt Beverage
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Solution Overview
Problem
Cross-flow filtration using ceramic membrane filters in fermented malt beverage production experiences a rapid increase in transmembrane pressure when silica xerogel with low drying loss is added, making long-term filtration operations challenging.
Innovation Solution
The method involves cross-flow filtering a fermented liquid containing malt through a monolithic ceramic membrane filter with a pore size of 0.5 µm or less, using silica gel with a drying loss of 10% or less, and maintaining a transmembrane pressure of 0.6 MPa or less, allowing for continuous filtration for 3 hours or more without additional disinfection or sterilization treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If silica xerogel with low drying loss is added as a stabilizer to fermented liquid, then stabilizing effect is improved, but transmembrane pressure increases rapidly making long-term filtration difficult
Solution Approach 1:
The patent changes the pore size parameter of the ceramic membrane filter to 0.5 μm or less, which is a specific parameter adjustment that resolves the contradiction between stabilizing effect and filtration duration. This parameter change allows the system to maintain effective stabilization while preventing rapid TMP increase during long-term filtration operations.
2Manufacturing precision
If ceramic membrane filter with small pore size is used, then filtration precision is improved, but permeation flux decreases making long-term operation difficult
Solution Approach 1:
The patent specifies a pore size of 0.5 μm or less for the ceramic membrane filter, which is a critical parameter change that simultaneously achieves high filtration precision and maintains adequate permeation flux for long-term operations. This specific parameter value resolves the contradiction between precision and productivity.
3Productivity
If cross-flow filtration is performed through ceramic membrane filter, then filtration efficiency is improved, but transmembrane pressure increases rapidly requiring frequent maintenance
Solution Approach 1:
The patent employs a ceramic membrane filter with pore size of 0.5 μm or less, which is a parameter change that maintains high filtration efficiency while preventing rapid TMP increase. This enables continuous operation for 3 hours or more without additional disinfection or sterilization, thereby improving operational continuity and reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively suppresses the rapid increase in transmembrane pressure, enabling a long-term filtration operation while maintaining the quality and filterability of the fermented malt beverage.
Implementation Method 1
cross-flow filtering a fermented liquid containing malt as a raw material through a monolithic ceramic membrane filter
Implementation Method 2
allowing the fermented liquid to permeate through at least one of the monolithic ceramic membrane filters
Implementation Method 3
silica gel, polyvinylpolypyrrolidone (PVPP) or the like is generally used as a stabilizer in order to adsorb and remove causative substances of turbidity
Data Source
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AI summary
Provide is a method of producing a fermented malt beverage, which includes a cross-flow filtration step using a ceramic membrane filter, contains silica xerogel in a fermented liquid, suppresses a rapid increase in transmembrane pressure, and enables a long-term filtration operation. The method of producing a fermented malt beverage, which includes cross-flow filtering a fermented liquid containing malt as a raw material. In this production method, the cross-flow filtration is performed through a monolithic ceramic membrane filter disposed apart from a flow path of the fermented liquid, including a slit having an opening in its side surface, and having a membrane pore size of 0.5 µm or less. The fermented liquid contains silica gel having a drying loss of 10% or less.