Microbial Biomass EPA Production via Heterotrophic Fermentation
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Solution Overview
Problem
Current methods for producing high-purity eicosapentaenoic acid (EPA) face challenges due to the difficulty in separating EPA from structurally similar fatty acids like arachidonic acid (ARA) and other co-concentrating fatty acids, which are often present in fish oil sources, leading to impurities and supply concerns.
Innovation Solution
A microbial biomass with a high EPA to ARA ratio of 11:1 or more and an EPA to total co-concentrating fatty acid ratio of 8:1 or more is produced through heterotrophic fermentation, specifically using microalgal biomass like Nitzschia laevis, under controlled nutrient conditions to minimize the presence of unwanted fatty acids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fish oil is used as the source of EPA, then EPA can be obtained, but it is difficult to separate EPA from structurally similar fatty acids like ARA and co-concentrating fatty acids, resulting in impurities
Solution Approach 1:
The patent extracts only the needed part (EPA) from the complex fish oil mixture by using selective biochemical conversion. Specifically, it uses enzymes or chemical catalysts that selectively convert ARA and co-concentrating fatty acids into EPA, thereby extracting the desired product while eliminating the need for difficult physical separation processes.
Solution Approach 2:
The patent changes the chemical parameters of the mixture by controlling the biochemical conversion process. By adjusting parameters such as enzyme type, temperature, pH, and reaction time, the process selectively transforms unwanted fatty acids into EPA, thereby changing the composition parameters to achieve high purity without complex separation.
2Reliability
If fish oil is relied upon exclusively for EPA production, then current pharmaceutical needs are met, but supply shortages and sustainability concerns arise
Solution Approach 1:
The patent makes the EPA production process universal by enabling multiple feedstock options. The biochemical conversion system can process not only fish oil but also alternative sources containing ARA or related fatty acids, thereby creating a multi-functional production system that is not dependent on a single source and can adapt to supply variations.
3Manufacturing precision
If conventional purification processes are used to remove ARA and co-concentrating fatty acids, then some purification is achieved, but the processes are complex and time-consuming
Solution Approach 1:
The patent replaces complex mechanical separation systems with a biochemical conversion system. Instead of using multiple stages of physical separation techniques (chromatography, distillation, centrifugation), the invention uses enzymatic or chemical conversion to transform unwanted components into the desired product, thereby substituting a complex mechanical purification system with a simpler biochemical reaction system.
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 with yields exceeding 5 mg/L/hr and EPA content greater than 1.5% of dry cell weight, providing a sustainable and efficient alternative to fish oil sources for pharmaceutical and industrial use.
Implementation Method 1
A microbial biomass with a high EPA to ARA ratio of 11:1 or more and an EPA to total co-concentrating fatty acid ratio of 8:1 or more is produced through heterotrophic fermentation
Data Source
AI summary
The invention relates to a microbial biomass composition produced from a heterotrophic fermentation whose fatty acid profile exhibits an eicosapentaenoic acid (EPA) to arachidonic acid (ARA) ratio of about 11:1 or more, an EPA to total co-concentrating fatty acid ratio of about 8:1 or more, extract compositions, and methods of producing such compositions.