Continuous Grain Germination for Low-Energy Cereal Brewing
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Solution Overview
Problem
The traditional malting process for beer production is lengthy, energy-intensive, and involves costly kiln-drying and transportation of malt, with issues like rootlet formation, enzyme insufficiency, and undesirable protein and β-glucan levels affecting beer quality and process efficiency.
Innovation Solution
A continuous and integrated brewing process that combines steeping and germination to achieve rapid moisture uptake and enzyme activation in barley grains, eliminating kiln-drying and allowing immediate division, using controlled aeration and optional gibberellic acid to accelerate germination, and employing exogenous enzymes for efficient starch and protein degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional two-step steeping process is used to increase moisture content to 40%, then grain moisture content is improved, but processing time increases to 32 hours
Solution Approach 1:
The patent combines the steeping process and germination process into a single integrated operation. By providing continuous aeration during germination in the steeping tank, the process achieves both moisture uptake and enzyme activation simultaneously, eliminating the need for separate steeping and germination stages, thereby reducing total processing time from 32 hours to approximately 2 days.
Solution Approach 2:
The patent implements continuous aeration throughout the germination process in the steeping tank, maintaining constant oxygen supply to the grain. This continuous action ensures uninterrupted enzyme synthesis and starch degradation, maximizing the efficiency of the process and reducing idle time between operations.
2Reliability
If kiln-drying is performed to remove rootlets and preserve malt, then malt quality is improved, but energy consumption increases significantly
Solution Approach 1:
The patent extracts and removes rootlets from the germinated grain before the mashing process. By separating the harmful rootlet component (which causes bitterness and off-flavors) from the useful germinated grain, the process achieves malt quality comparable to or better than kiln-dried malt without requiring the energy-intensive drying operation.
Solution Approach 2:
The patent uses a disposable filtration medium (such as filter press fabric or similar filtering material) to remove rootlets and solid matter from the mash. This inexpensive, single-use filtering approach replaces the expensive and energy-intensive kiln-drying process, achieving the same quality improvement through a low-cost, low-energy method.
3Power
If germination time is extended to activate enzymes, then enzyme activity is improved, but rootlet formation increases causing bitterness
Solution Approach 1:
The patent extracts and removes rootlets from the germinated grain through filtration during the mashing process. By separating the harmful rootlet component (which causes bitterness and off-flavors) from the useful germinated grain, the process achieves high enzyme activity without the negative effects of extended germination.
Solution Approach 2:
The patent performs preliminary germination with continuous aeration to activate enzymes and begin starch degradation before mashing. This preliminary action ensures sufficient enzyme activity is achieved while the grain is still in the germinated but not overly mature state, minimizing rootlet development before the rootlets are removed through filtration.
4Reliability
If conventional separate malting and brewing facilities are used, then process control is improved, but transportation costs and time increase
Solution Approach 1:
The patent merges the malting process and brewing process into a single integrated operation within one facility. By combining the steeping tank with continuous aeration for germination directly with the mashing and filtration equipment, the process eliminates the need to transport malt between separate facilities, reducing transportation time and costs while maintaining process control through integrated operation.
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 method significantly reduces the malting time to ~2 days, saves energy and water, minimizes rootlet formation, and enhances beer quality by maintaining high fermentable sugar levels and reducing β-glucan and xylan, thus lowering production costs and environmental impact.
Implementation Method 1
O2 is supplied to said liquid, preferably continuously throughout said incubation
Implementation Method 2
GA is added to speed up the process of enzyme secretion from the aleurone layer
Implementation Method 3
The starch-degrading enzymes - which include α- and β-amylases, starch debranching enzymes and α-glucosidases - partially depolymerize the starch reserves of the grain to monosaccharides, oligosaccharides, and glucose
Implementation Method 4
The depolymerization products of starch are subsequently used by yeast cells as a carbon source and are fermented into beer ethanol
Data Source
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Figure 2A
Figure 2A
AI summary
The present invention relates to methods for preparing cereal-based beverages. Particularly, the present invention provides, for example, methods for steeping and germination of cereal grain under continuous aeration. The present invention also provides for wet milling of germinated cereal grains and direct transfer of the germinated grain, without drying, to the brewery for further processing. Compared to current methods the methods of the present invention significantly reduces water consumption, energy consumption and transport need.