Microwave Crystal Malt Processing for High Crystallinity
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Solution Overview
Problem
Conventional methods for producing crystal malts result in low yields and crystallization rates, and may contain harmful compounds like 4-methylimidazole, which is a potential carcinogen.
Innovation Solution
A method involving microwaving germinated malt to achieve a crystallization rate of at least 85%, reducing moisture content, and subsequent kiln drying to produce high-crystallinity malt with minimal 4-methylimidazole levels, using microwave radiation frequencies of 915 MHz to 2450 MHz and temperatures of 65° C to 68° C, followed by cooling and further drying to achieve desired moisture levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional kiln drying or roasting is used to produce crystal malt, then the malt can be dried and processed, but the crystallization rate is limited to 50-60% and harmful compounds like 4-methylimidazole are produced
Solution Approach 1:
The patent applies parameter changes by using microwave heating instead of conventional kiln drying or roasting. The microwave frequency (2450 MHz) and controlled temperature range (65-68°C) create different thermal conditions that enable complete saccharification (100% crystallization) without producing 4-methylimidazole, thereby resolving the contradiction between achieving high crystallization rates and avoiding harmful compounds
Solution Approach 2:
The patent substitutes the conventional thermal-mechanical drying system with a microwave electromagnetic field system. This replacement allows for more uniform and controlled heating that achieves complete starch conversion to sugar without the harmful byproducts associated with traditional high-temperature roasting, thus improving crystallization while eliminating harmful factors
2Manufacturing precision
If roasting is used instead of kiln drying to produce crystal malt, then the grain is roasted at higher temperatures, but the throughput is lower and yields are reduced
Solution Approach 1:
The patent changes the heating parameters by using microwave radiation at 2450 MHz with controlled power levels to maintain temperatures between 65-68°C. This parameter change enables faster and more efficient processing compared to conventional roasting, achieving 100% crystallization while maintaining high throughput and yield
3Quantity of substance
If conventional kiln drying is used to dry germinated grain, then the drying process can be completed, but the crystallization rate remains limited at 50-60%
Solution Approach 1:
The patent replaces the conventional kiln drying system with microwave heating. This substitution not only achieves moisture reduction but also simultaneously achieves complete saccharification (100% crystallization) through the unique heating characteristics of microwaves that promote uniform starch conversion without the limitations of conventional thermal drying
Solution Approach 2:
The patent utilizes phase transitions in the microwave heating process. The microwave energy causes water molecules to rotate and generate heat, creating steam that penetrates the grain kernel and facilitates complete starch conversion. The controlled temperature phase transition enables 100% crystallization while effectively reducing moisture content
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
The method significantly increases crystallinity, reduces energy costs, eliminates detectable 4-methylimidazole, and produces a wort with favorable beta-glucan levels and flavor profiles, achieving crystallization rates of up to 100% and enhancing brewing properties.
Implementation Method 1
The batch of germinated malt is microwaved such that at least 85% of the batch of germinated malt saccharifies. During micrawving, the first moisture content is reduced to a second moisture content.
Implementation Method 2
the process may also include a step of cooling the batch of germinated malt after micrawving to allow the saccharified batch of germinated malt to crystallize
Implementation Method 3
the method also includes a step of drying the batch of germinated malt so as to reduce the second moisture content to a third moisture content
Data Source
AI summary
A process of producing crystal malt in which a batch of malted grain or germinated malt having a first moisture content is provided. The batch is heated by mircowaving or steaming such that at least 85% of the batch saccharifies. During heating, the first moisture content is reduced to a second moisture content. Embodiments of a batch of crystal malt are also provided. The batch of crystal malt includes at least 90% crystallized malt kernels. Further, the batch of crystal malt contains less than 50 ppb of 4-methylimidazole (4-MeI).