Soybean Processing for Hexanal Reduction in Food Products
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Solution Overview
Problem
Soy-based food products often have unfavorable beany and/or cereal-like taste characteristics due to lipid oxidation during processing, packaging, and storage, which is indicated by high hexanal levels, and existing methods like UHT pasteurization have limited success in reducing these levels.
Innovation Solution
Using soybeans with a high protein:oil ratio greater than 2.3, heating, and grinding them with water at 180° F. to 190° F. to produce a soy extract with hexanal levels below 50 parts per billion, which is then combined with other ingredients to create soy-based food products with improved taste characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional soybeans are used in soy-based food products, then the products can be manufactured with standard ingredients, but the products develop unfavorable beany and cereal-like taste characteristics due to lipid oxidation
Solution Approach 1:
The patent changes the compositional parameter of soybeans by selecting varieties with high protein:oil ratios (greater than 2.3). This parameter change inherently reduces the substrate available for lipid oxidation, thereby preventing the formation of unfavorable beany and cereal-like taste characteristics while maintaining ease of manufacture with standard soybean processing methods
2Productivity
If UHT pasteurization is used to reduce hexanal levels, then the processing method is simple and rapid, but the reduction in hexanal levels is limited and insufficient
Solution Approach 1:
The patent applies preliminary action by selecting soybeans with high protein:oil ratios before processing. This pre-selection prevents the formation of excessive hexanal during subsequent UHT pasteurization and storage, making the simple and rapid UHT process sufficiently effective where it would otherwise fail, thus maintaining processing efficiency while achieving adequate hexanal reduction
3Manufacturing precision
If soybeans with high protein:oil ratios are used, then hexanal levels are reduced to below 50 ppb, but the selection of soybean varieties is more restricted
Solution Approach 1:
The patent establishes a specific parameter threshold (protein:oil ratio greater than 2.3) that defines suitable soybean varieties. This quantitative criterion provides clear guidance for variety selection, enabling precise control of hexanal levels below 50 ppb while maintaining adaptability by identifying multiple soybean varieties that meet this specification
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 effectively reduces hexanal levels in soy extracts, resulting in soy-based food products with more favorable taste profiles and reduced grain/cereal taste characteristics, allowing for either similar or higher protein content compared to current products while maintaining favorable taste.
Implementation Method 1
These taste characteristics may be the result of lipid oxidation during processing, packaging, and/or storage of the products
Data Source
AI summary
In one embodiment, a method comprises adding a plurality of soybeans to an extractor, the soybeans having an average protein:oil ratio of greater than 2.3, heating the soybeans, removing hulls from the plurality of soybeans, and grinding the plurality of soybeans with water at a temperature between 180° F. and 190° F. to yield a soy extract having hexanal levels of less than 50 parts per billion (ppb).