Fava Protein Composition Ultrafiltration Hexanal Removal
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Solution Overview
Problem
Existing methods for extracting fava proteins from fava beans result in compositions with inferior solubility and functional properties, often containing high levels of vicine, hexanal, and phenolic compounds, which can lead to undesirable flavors and nutritional reductions.
Innovation Solution
A fava protein composition comprising fava globulins and albumins with a solubility of at least 55% at pH 7 and 20°C, and a hexanal content of no more than 2.5 ppm, achieved through a method involving milling de-hulled fava beans, forming a suspension, removing solids, subjecting the liquid to ultrafiltration, and optionally pasteurizing and drying the retentate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If acid precipitation is used to extract fava proteins, then globulins are collected, but protein solubility is reduced and albumins are discarded
Solution Approach 1:
The patent applies parameter changes by using ultrafiltration with specific molecular weight cut-off values (30-50 kDa) to separate proteins based on their size and properties, allowing both albumins and globulins to be retained while removing harmful compounds. This alternative separation parameter enables maintaining high protein solubility (≥55% at pH 7) while collecting complete protein fractions.
Solution Approach 2:
The patent introduces ultrafiltration membranes as an intermediary separation mechanism between the extraction and final protein isolation steps. This intermediary device allows selective retention of proteins based on molecular weight while permitting harmful compounds (vicine, hexanal, phenolics) to pass through, thereby resolving the contradiction between protein collection and solubility maintenance.
2Productivity
If dried fava beans with seed coat and embryo radicle are used, then protein extraction is possible, but phenols, polyphenols, saponins and tannins are introduced causing browning
Solution Approach 1:
The patent applies preliminary action by de-hulling the fava beans before extraction to remove the seed coat and embryo radicle that contain harmful compounds (phenols, polyphenols, saponins, tannins). This preliminary removal step prevents browning during subsequent extraction and processing, while still allowing efficient protein extraction from the remaining protein-rich cotyledons.
Solution Approach 2:
The patent extracts and removes harmful compounds through ultrafiltration with appropriate molecular weight cut-off. The membrane selectively allows small harmful molecules (vicine, hexanal, phenolics) to pass into the permeate while retaining the larger protein molecules in the retentate, thereby separating the desirable proteins from the harmful substances.
3Stability of the object's composition
If high pH suspension is used for protein extraction, then protein solubility is improved, but browning and lysinoalanine formation increase
Solution Approach 1:
The patent optimizes the pH parameter to a neutral range (pH 7 ± 1) for the extraction suspension, which maintains good protein solubility while preventing the harmful effects of high pH such as browning and lysinoalanine formation. The ultrafiltration step then further purifies the protein concentrate to achieve the desired solubility (≥55% at pH 7) without compromising quality.
4Reliability
If pasteurization is performed before ultrafiltration, then microbial proliferation is prevented, but toxins may be expressed and protein quality reduced
Solution Approach 1:
The patent applies preliminary action by performing ultrafiltration before pasteurization. This sequence allows the protein concentrate to be separated and concentrated first, then pasteurized at an optimized temperature (60-70°C for 10-30 minutes) that ensures microbial safety while minimizing protein denaturation and toxin expression. The ultrafiltration step removes harmful compounds that would otherwise interfere with pasteurization effectiveness.
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 fava protein composition exhibits improved solubility, emulsifying properties, and a neutral flavor, making it suitable for various applications while being non-toxic and eco-friendly, capable of replacing synthetic and animal-derived emulsifiers.
Implementation Method 1
subjecting the liquid to ultrafiltration to form a retentate
Data Source
AI summary
The invention pertains to a fava protein composition comprising:fava globulins and fava albumins; andat most 2.5 ppm hexanal, based on the weight of the protein in the fava protein composition,wherein the solubility of the protein in water at a pH of 7 and at a temperature of 20° C. is at least 55%, and wherein the weight ratio of fava albumins to fava globulins in the fava protein composition is between 1:4 and 1:20.The invention further pertains to a method of extracting fava proteins from de-hulled fava beans.