Enzymatic Triglyceride Extraction from Oleaginous Microorganisms
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Solution Overview
Problem
Current methods for extracting triglycerides from oleaginous microorganisms are inefficient, environmentally unsustainable, and high-energy consuming, making them unsuitable for both small-scale and industrial applications, particularly due to the need for multiple steps and the use of organic solvents which affect the quality and purity of the extracted triglycerides.
Innovation Solution
A single-step method involving an enzyme system with hydrolase activity for cell wall hydrolysis, followed by protease treatment and the addition of a short-chain polymer for demulsification, allowing for the separation of triglycerides, cell debris, and sugars/amino acids into distinct layers without the use of solvents, enabling scalable and low-energy lipid recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional two-step extraction procedures (cell-wall lysis followed by organic solvent extraction) are used, then triglycerides can be extracted from oleaginous microorganisms, but the process requires multiple discrete steps, uses harmful organic solvents, and incurs high costs and energy consumption
Solution Approach 1:
The patent combines cell-wall lysis and triglyceride extraction into a single integrated step using a specific enzyme system (cellulase, hemicellulase, and pectinase) that simultaneously breaks down the cell wall and releases triglycerides, eliminating the need for separate lysis and extraction steps while maintaining high purity
Solution Approach 2:
The patent replaces mechanical cell-wall lysis methods (temperature shocks, high pressure homogenization) with an enzymatic system that selectively degrades cell wall components, achieving both cell wall disruption and triglyceride release without mechanical damage to the product
2Productivity
If organic solvents (petroleum ether, methanol, or chloroform) are used for triglyceride extraction, then extraction efficiency is improved, but the quality of the finished product is negatively impacted and solvent removal requires additional cost and energy
Solution Approach 1:
The patent uses water as a benign, inexpensive extraction medium instead of expensive, harmful organic solvents, achieving effective triglyceride extraction through enzymatic cell wall degradation followed by simple centrifugation and filtration
Solution Approach 2:
The patent converts the typically harmful organic solvent extraction step into a beneficial enzymatic process that not only releases triglycerides but also degrades cell wall components into useful byproducts, eliminating the need for harmful solvents while maintaining high extraction efficiency
3Ease of operation
If enzyme-assisted lipid release is applied to enhance cell rupture, then lipid extraction is improved, but various pretreatments are still required and organic solvents must be added for lipid recovery
Solution Approach 1:
The patent performs preliminary enzymatic degradation of cell wall components (cellulose, hemicellulose, pectin) before lipid extraction, creating a预处理 that naturally facilitates lipid release without requiring additional mechanical or chemical pretreatment steps
Solution Approach 2:
The patent uses a multi-enzyme system that simultaneously performs multiple functions: cell wall degradation, lipid release, and byproduct generation, eliminating the need for separate pretreatment and extraction steps while improving overall extraction efficiency
4Productivity
If high-energy pretreatments (ultrasonic irradiation and heating at 95°C) are applied for enzyme-assisted aqueous extraction processing, then lipid extraction is enhanced, but the process becomes high-energy consuming and inapplicable at industrial scale
Solution Approach 1:
The patent changes the temperature parameter from high-energy heating (95°C) to mild enzymatic treatment temperatures (37-50°C), and replaces ultrasonic irradiation with enzymatic catalysis, achieving effective lipid extraction at significantly lower energy consumption suitable for industrial scaling
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 method achieves high-purity triglyceride extraction with up to 99.9% recovery rate, reducing operational costs by tenfold compared to traditional methods and ensuring the triglycerides are free from organic solvent traces, making it suitable for both food and pharmaceutical applications.
Implementation Method 1
adding an enzyme system to the oleaginous microorganism, wherein the enzyme system comprises hydrolase activity to hydrolyze the cell wall of the microorganism
Implementation Method 2
adding a short-chain polymer, which is for example linear, branched or cross-linked, to the hydrolyzed oleaginous microorganism of step a) and/or b) for demulsification, wherein three separate layers are formed
Data Source
Figure 1A~1D
Figure 2~3
Figure 4~5
AI summary
The present invention refers to a method for extracting a triglyceride from an oleaginous microorganism. Further, it is directed to an enzyme system comprising an enzyme having hydrolase activity for use in such method.