Expanded Bed Adsorption Lactoferrin Isolation
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Solution Overview
Problem
Current expanded bed adsorption (EBA) technology is inefficient for large-scale commercial isolation of lactoferrin and other milk proteins due to high liquid volumes and the use of sodium hydroxide, which can cause protein denaturation, limiting their use in nutritional compositions like infant formulas.
Innovation Solution
An improved EBA process involving a diafiltration step, citrate addition, and elution with a sodium chloride buffer of varying concentrations to enhance protein binding and reduce denaturation, allowing for efficient isolation of lactoferrin and other milk proteins from mammalian milk sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current EBA technology uses high concentration sodium hydroxide (e.g., 200 mM) during elution, then lactoferrin can be eluted from the matrix, but protein denaturation occurs causing irreversible structural changes
Solution Approach 1:
The patent changes the chemical parameters of the elution buffer by replacing high concentration sodium hydroxide with sodium chloride at optimized concentrations (0.5-2.0 M), thereby maintaining elution effectiveness while preventing protein denaturation and preserving lactoferrin structural integrity
Solution Approach 2:
The patent introduces citrate as an intermediary substance in the elution buffer system. Citrate acts as a mediator that facilitates lactoferrin elution from the cation-exchange matrix while maintaining gentle conditions that preserve protein structure, avoiding the harsh denaturing effects of high concentration NaOH
2Productivity
If current EBA technology uses large volumes of liquid during processing, then complete elution of lactoferrin can be achieved, but process efficiency and commercial viability are reduced
Solution Approach 1:
The patent optimizes the ionic strength and composition parameters of the elution buffer using sodium chloride at specific concentrations (0.5-2.0 M), which improves elution efficiency and allows for reduced liquid volumes while maintaining complete lactoferrin recovery, thereby enhancing process productivity
Solution Approach 2:
The patent applies a concentrated elution buffer with optimized sodium chloride concentration that achieves complete elution in a single step with reduced volume, rather than using large volumes of dilute buffer, thus improving process efficiency and commercial viability
3Ease of manufacture
If conventional purification methods are used to obtain bovine lactoferrin, then lactoferrin can be isolated, but the processes are inefficient for widespread commercial use
Solution Approach 1:
The patent segments the purification process into distinct stages: (1) cation-exchange EBA for initial concentration and partial purification, (2) optimized elution with sodium chloride-citrate buffer for lactoferrin recovery, and (3) further purification steps if needed. This segmented approach improves both commercial scalability and purification efficiency compared to conventional single-step methods
Solution Approach 2:
The patent performs preliminary concentration and pre-purification of lactoferrin from bovine whey using cation-exchange EBA before final elution and purification steps. This preliminary action removes bulk contaminants and concentrates the target protein, making subsequent processing more efficient and commercially viable
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 process reduces liquid volume, minimizes protein denaturation, and increases the yield of lactoferrin, making it suitable for commercial production and use in nutritional products.
Implementation Method 1
applying a milk source to the matrix, and eluting the lactoferrin
Implementation Method 2
The milk source is subjected to a diafiltration process
Implementation Method 3
adding citrates to the milk source in a concentration ranging from about 0.01 % to about 2.0% w/v of the milk source
Data Source
AI summary
The present disclosure relates to improved expanded bed adsorption processes for isolating proteins from milk sources. In particular embodiments, the present disclosure provides a process for isolating a milk protein, such as lactoferrin, from a milk source comprising establishing an expanded bed adsorption column comprising a particulate matrix, applying a milk source to the matrix, and eluting the lactoferrin from the matrix with an elution buffer comprising about 0.3 to about 2.0 M sodium chloride.