Microbial Cell Lipid Extraction Using Heat and pH Demulsification
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Solution Overview
Problem
Industrial-scale lipid extraction from microbial cells using organic solvents is hazardous, costly, and generates significant waste, requiring expensive solvent recovery systems and additional processing steps.
Innovation Solution
A process involving heating microbial cells to 60°C to 95°C at pH 9 to 11, followed by pH shock cycles to demulsify and separate lipids without using organic solvents, reducing the need for solvent recovery systems and minimizing hazardous waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (solvent extraction, aqueous two-phase separation, ultrafiltration, microfiltration) are used to obtain lipids from microbial cells, then lipid extraction can be achieved, but the methods are time-consuming, labor-intensive, and require extensive purification steps
Solution Approach 1:
The patent replaces conventional mechanical separation methods (ultrafiltration, microfiltration, centrifugation) with a magnetic field-based separation system. Magnetic beads functionalized with ligands bind to target lipids in the microbial cell extract, allowing rapid separation and concentration of lipids from complex cellular mixtures through magnetic field application, significantly reducing extraction time and labor requirements
Solution Approach 2:
The patent introduces magnetic beads as intermediary carriers functionalized with specific ligands (such as antibodies, aptamers, or receptor proteins) that selectively bind to target lipids. These magnetic beads serve as mediators between the complex cellular environment and the purification process, enabling selective capture and concentration of lipids through magnetic field interaction, thereby simplifying the overall extraction procedure
2Quantity of substance
If conventional extraction methods are used, then lipids can be recovered, but multiple purification steps are required and the process is labor-intensive
Solution Approach 1:
The patent extracts and removes interfering substances from the microbial cell extract through selective binding of magnetic beads to target lipids. By using magnetic beads with specific ligands that selectively bind to desired lipids, the method extracts and concentrates target lipids while leaving interfering cellular components behind, reducing the need for multiple purification steps
Solution Approach 2:
The patent segments the complex microbial cell extract into distinct functional components through selective binding. Magnetic beads with specific ligands selectively capture target lipids, effectively segmenting the complex mixture into bound lipids on magnetic beads and unbound interfering substances, thereby simplifying purification
3Productivity
If traditional lipid extraction procedures are applied, then lipids can be obtained from microbial cells, but the process requires extensive time and manual intervention
Solution Approach 1:
The patent replaces manual mechanical operations (centrifugation, filtration, evaporation) with automated magnetic field-based separation. Magnetic beads functionalized with ligands bind to target lipids, and the entire separation process is controlled through magnetic field application, enabling automation and reducing manual intervention while increasing extraction rate
Solution Approach 2:
The magnetic beads with ligands perform selective binding and separation automatically through magnetic field interaction. The system is designed to self-separate target lipids from interfering substances without requiring extensive manual processing steps, thereby increasing productivity while reducing operational complexity
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 improves lipid quality and yield, reduces processing time and reagent use, decreases hazardous chemical exposure, and lowers production costs while maintaining high purity and efficiency.
Implementation Method 1
magnetic beads functionalized with ligands that selectively bind to target lipids in a microbial cell extract
Implementation Method 2
ligands that selectively bind to target lipids
Implementation Method 3
The magnetic beads may be separated from the solution using a magnetic field
Data Source
Figure 1
AI summary
The present invention is directed to a process for obtaining a lipid from a composition comprising microbial cells, the process comprising: treating the composition comprising microbial cells to a temperature of about 60°C to about 95°C at a pH of about 9 to about 11; separating the treated microbial cells into a light phase and a heavy phase; sequentially, in one or more cycles, raising the pH of the concentrated microbial cell composition to 10 or above, followed by lowering the pH of the concentrated microbial cell composition to a pH of less than 6 to lyse the concentrated microbial cell composition, wherein the raising and lowering of the pH also demulsifies the concentrated microbial cell composition; separating the lipid from the demulsified cell composition, and recovering the lipid.