Wheat Protein Isolate Production Without Sulfites
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Solution Overview
Problem
Existing wheat protein isolates often contain sulfites, which can cause allergic reactions in consumers and preclude the use of 'natural' or 'organic' descriptors, and lack desirable viscosities and flavor profiles.
Innovation Solution
A process involving the admixing of water and an acid with wheat gluten to form a gluten slurry, agitated at a reaction temperature to produce isolated wheat proteins substantially free of sulfites, achieving suitable viscosities and flavor profiles without enzyme hydrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sulfites are added to wheat protein isolates to reduce viscosity, then the product becomes more liquid and easier to process, but allergic responses are triggered in certain consumers and natural/organic descriptors cannot be used
Solution Approach 1:
The patent changes the chemical parameters of the wheat protein isolate by using alternative reducing agents (ascorbic acid, cysteine, glutathione) instead of sulfites. These alternatives achieve the desired viscosity reduction through different chemical mechanisms while avoiding the harmful allergic responses associated with sulfites.
Solution Approach 2:
The patent employs food-grade acids (citric acid, acetic acid, lactic acid) as temporary pH modifiers during processing. These acids serve their purpose of facilitating protein extraction and then can be neutralized or removed, leaving no harmful residual effects unlike sulfites which persist and cause allergic reactions.
2Ease of operation
If sulfites are used to modify wheat protein isolates, then viscosity is reduced, but the product cannot be labeled as natural or organic
Solution Approach 1:
The patent achieves viscosity control through pH adjustment using food-grade acids and alternative reducing agents. This parameter change approach modifies the protein structure temporarily during processing to achieve desired flow properties without incorporating prohibited sulfite additives that would compromise natural/organic certification.
Solution Approach 2:
The patent introduces intermediary substances such as ascorbic acid and cysteine that act as mediators between the wheat protein and the desired liquid state. These intermediaries facilitate the viscosity reduction process through reversible chemical interactions, allowing the final product to maintain its natural/organic status without direct sulfite contamination.
3Ease of operation
If enzyme hydrolysis is used to produce wheat protein isolates, then protein structure is modified, but the process becomes more complex and may introduce unwanted byproducts
Solution Approach 1:
The patent replaces the biological enzymatic system with a chemical system using pH adjustment and alternative reducing agents. This substitution achieves similar protein solubility enhancement through acid-denaturation and disulfide bond reduction mechanisms, avoiding the complexity of enzyme selection, optimization, and control that characterizes enzymatic hydrolysis processes.
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 resulting isolated wheat proteins have improved viscosities, foaming characteristics, and flavor profiles, allowing for the production of 'natural' and 'organic' labeled food products without sulfite-related allergens, with faster foaming and blander flavors compared to sulfite-containing isolates.
Implementation Method 1
Reducing agents are added to the wheat protein isolates to cleave the inter- and/or intra-strand cross-links between protein strands
Implementation Method 2
A process involving the admixing of water and an acid with wheat gluten to form a gluten slurry, agitated at a reaction temperature to produce isolated wheat proteins
Implementation Method 3
generation of foam and other types of controlled air entrapment
Data Source
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AI summary
Isolated wheat protein compositions that are substantially free of sulfites and which comprise an isolated wheat protein and an acid are described. Methods of forming such compositions are also described.