Quick-Cooking Barley via Case-Hardening Drying Process
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Solution Overview
Problem
The lengthy cooking and soaking times required for barley products hinder their market acceptance and use as a quick-cooking, nutritious alternative to rice and other grains, despite barley's nutritional benefits.
Innovation Solution
A process involving pearling, soaking, and drying barley to achieve a moisture content of at least 60% followed by high-temperature drying to case harden the kernels, then further drying at a lower temperature to produce a quick-cooking barley product with a moisture content of less than 10%, maintaining the original shape and nutritional value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional barley processing methods (blocking, pearling, flaking, milling) are used, then the barley can be prepared for consumption, but the cooking time becomes excessively long (approximately one hour)
Solution Approach 1:
The barley grains are precooked under pressure before drying, which gelatinizes the starch and softens the grain structure in advance. This preliminary cooking action eliminates the need for lengthy cooking times later, as the grains only require rehydration and brief heating to become edible.
Solution Approach 2:
The invention changes the physical and chemical parameters of the barley through controlled pressure cooking and specific drying conditions. The pressure cooking increases moisture content and gelatinizes starch, while the subsequent drying at controlled temperatures creates a case-hardened exterior that protects the softened interior, resulting in grains that cook quickly upon rehydration.
2Reliability
If whole grain hulless barley is used to maintain nutritional value, then a lengthy soak (several hours) is required prior to cooking
Solution Approach 1:
The whole grain hulless barley undergoes preliminary pressure cooking that penetrates the intact hull and gelatinizes the starch throughout the kernel. This advance treatment eliminates the need for prolonged soaking, as the grain structure has already been softened and made accessible to water during the pressure cooking phase.
Solution Approach 2:
The pressure cooking process changes the physical state of the starch and moisture distribution within the whole grain kernel, while the controlled drying process preserves these changes. The resulting product maintains the complete nutritional profile of whole grain barley but requires no extended soaking, as the grain structure has been permanently altered to facilitate rapid water absorption during final preparation.
3Loss of time
If excessive pearling is performed to remove hull and bran, then cooking time is reduced, but nutritional value is significantly reduced
Solution Approach 1:
The invention applies preliminary pressure cooking to lightly pearled or minimally processed barley, which gelatinizes the starch and softens the grain without requiring extensive removal of nutritional layers. This advance treatment achieves quick-cooking properties while preserving the nutritional integrity of the remaining grain structures.
Solution Approach 2:
The pressure cooking and controlled drying process changes the physical properties of the barley kernel, creating a case-hardened exterior that protects the softened interior. This allows minimally processed barley with intact nutritional layers to achieve quick-cooking characteristics without the need for excessive pearling that would remove valuable nutrients.
4Loss of time
If compression is applied during cooking to reduce cooking time, then the barley appears physically deformed
Solution Approach 1:
The barley grains are precooked under pressure without mechanical compression, allowing the starch to gelatinize and the grain to soften uniformly. The subsequent drying process creates a case-hardened exterior that maintains the grain's original shape while preserving the softened interior structure, eliminating the need for compression that would cause deformation.
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 process results in a quick-cooking barley product that reconstitutes in under 20 minutes, retaining the texture, appearance, and nutritional profile of traditional barley, overcoming the limitations of lengthy cooking times and nutritional loss in existing methods.
Implementation Method 1
drying the precooked barley at a first temperature of greater than about 160° C. until case hardening of the barley kernel is achieved
Implementation Method 2
soaking and precooking the barley in a single step to gelatinize starch within the barley kernel
Implementation Method 3
drying the precooked barley at a first temperature of greater than about 160° C.
Data Source
AI summary
A method for processing barley to make a quick-cooking barley product is described. Barley is pearled to remove hulls, and is then precooked to raise the moisture content and gelatinize starch in a single step. The precooked barley is dried in two stages. The first drying stage causes case hardening of the kernel, while the second stage heats moisture trapped within the kernel to cause steam expulsion from the hardened kernel and final drying of the precooked barley. The resulting dried product is a porous kernel that may be shipped, stored, and easily reconstituted by the end user.