EPA Purification via Enzymatic Hydrolysis of Polar Lipids
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Solution Overview
Problem
Current methods for producing high-purity eicosapentaenoic acid (EPA) are hindered by the presence of undesired molecules in fish oil, which are structurally similar to EPA and difficult to remove, leading to inefficient purification and high costs, while alternative sources like microalgae offer a complex fatty acid composition that can facilitate purification but require optimized culture conditions.
Innovation Solution
A process involving largely heterotrophic microalgae cultures under controlled illumination and nutrient limitation to maximize polar lipid production, specifically targeting EPA-rich galactolipids, followed by enzymatic hydrolysis to isolate EPA, allowing for efficient purification and high-purity EPA composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fish oil is used as the source for EPA production, then EPA can be obtained, but undesired molecules are present and difficult to remove, leading to inefficient purification and high costs
Solution Approach 1:
The patent extracts and removes undesired molecules from the EPA composition through purification processes. By taking out the harmful components (such as docosahexaenoic acid and other fatty acids) from the fish oil source, the method achieves high-purity EPA while maintaining the beneficial EPA content, thus resolving the contradiction between quantity and purity.
Solution Approach 2:
The patent employs changes in physical and chemical parameters during purification processes, such as temperature, pressure, pH, and solvent selection. These parameter changes enable selective removal of undesired molecules while preserving EPA, allowing efficient purification without compromising the EPA quantity or increasing costs excessively.
2Manufacturing precision
If microalgae are used as an alternative source for EPA production, then a complex fatty acid composition is produced, but this facilitates purification while requiring optimized culture conditions
Solution Approach 1:
The patent optimizes culture parameters such as light intensity, temperature, nutrient composition, and CO2 concentration to control the fatty acid composition of microalgae. By carefully adjusting these parameters, the method produces microalgae with favorable fatty acid profiles that facilitate EPA purification, achieving high purity while managing the complexity of culture condition control through systematic parameter optimization.
3Quantity of substance
If fish oil is used for EPA production, then EPA can be sourced, but production costs are high and environmental challenges arise from fish oil sourcing
Solution Approach 1:
The patent creates a sustainable alternative to fish oil by using microalgae as a biotechnological copy or surrogate source. Instead of relying on wild fish populations, the method cultivates microalgae that produce EPA and similar fatty acids, thereby maintaining EPA availability while eliminating the environmental and economic problems associated with fish oil sourcing and reducing production costs.
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 approach enables the production of high-purity EPA compositions with reduced levels of undesired molecules, enhancing bioavailability and therapeutic efficacy while reducing production costs and environmental challenges associated with fish oil sourcing.
Implementation Method 1
a capability of photosynthetic lipid production
Implementation Method 2
largely heterotrophic culture
Implementation Method 3
enzymatic hydrolysis to isolate EPA
Data Source
AI summary
Eicosapentaenoic acid (EPA) compositions and EPA-rich polar lipids for prophylactic or therapeutic applications are described. Production from certain cultured micro-organisms (like Nitzschia laevis) promotes synthesis of EPA, including polar lipids including EPA. The EPA-rich polar lipids themselves may be used as polar compounds. EPA can be selectively hydrolysed from particular positions in isolated polar lipids by lipase activity, then optionally further purified. The process bypasses reliance on diminishing fish stocks and on physico-chemical processes that may not adequately separate desirable n-3 HUFAs from unwanted products like DHA also found in fish oil and cultured organisms.