High-Pressure Homogenization for Chlorella Cell Wall Breaking
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Solution Overview
Problem
Current methods for breaking the cell walls of microalgae, such as Chlorella, face challenges in scalability, stability of emulsions, drying issues, and microbial contamination, particularly when using high-pressure homogenization technology, which limits their industrial application.
Innovation Solution
A process utilizing high-pressure homogenization at pressures between 300 and 400 MPa in a single pass or two successive passes at 150 to 300 MPa, combined with controlled temperature between 4 and 40°C, to achieve over 80% cell wall breaking efficiency, produce emulsions with particle sizes less than 1 µm, and significantly reduce microbial load, thereby simplifying the process and enhancing product stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical methods like microbead grinding or high pressure homogenization are used to break cell walls, then cell breaking efficiency is improved, but the process becomes difficult to extrapolate to industrial scale
Solution Approach 1:
The invention changes the pressure parameter to extremely high levels (300-500 MPa) and controls temperature parameters (4-40°C) to achieve effective cell breaking at industrial scale. This parameter optimization resolves the contradiction by making the process both efficient and scalable.
Solution Approach 2:
The invention segments the cell breaking process into controlled high-pressure passes through homogenization valves, allowing the complex task of breaking resistant Chlorella cell walls to be divided into manageable stages that can be scaled industrially.
2Productivity
If high pressure homogenization is used to break cell walls, then cell breaking efficiency is improved, but emulsion stability deteriorates
Solution Approach 1:
By optimizing pressure (300-500 MPa) and temperature (4-40°C) parameters, the invention achieves cell breaking while controlling emulsion formation to maintain stability. The controlled temperature prevents excessive heat generation that would compromise emulsion stability.
Solution Approach 2:
The invention applies pressure that is excessive compared to traditional methods (300-500 MPa), which completely breaks the resistant cell walls and simultaneously controls emulsion properties through the secondary valve, achieving both high efficiency and stability.
3Productivity
If high pressure homogenization is used to break cell walls, then cell breaking efficiency is improved, but microbial contamination increases
Solution Approach 1:
The invention converts the potentially harmful high pressure and heat generation into a beneficial sterilization effect. The extreme conditions (300-500 MPa, with temperature control) that break cell walls also reduce microbial load by a factor of 1000-10,000, turning a process parameter into a sanitation advantage.
4Productivity
If the cell density in the medium is high (>100g/L), then productivity is improved, but the technological choices for cell breaking become very limited
Solution Approach 1:
The invention changes the pressure parameter to extremely high levels (300-500 MPa) and controls temperature (4-40°C), enabling effective cell breaking at high cell densities (>100g/L) where other technologies fail. This parameter optimization expands technological adaptability to high-productivity conditions.
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 ensures a high cell wall breakage rate, produces a stable and fine emulsion, and effectively reduces microbial contamination, eliminating the need for additional processing steps and technologies, thus simplifying the industrial-scale processing of microalgae.
Implementation Method 1
high pressure homogenization is carried out: in at least one pass at a pressure between 300 and 400 MPa, or in at least two successive passes at a pressure between 150 and 300 MPa
Implementation Method 2
The rapid pressurization of the treatment fluid (up to 350 MPa) causes a temperature increase of around 3°C/100 MPa, while the instantaneous pressure drop occurring in the homogenization valve induces an increase in heat. greater (15 to 20 °C/100 MPa)
Implementation Method 3
Since the final temperature can be high, depending on the inlet temperature and operating pressure level, rapid cooling of the process fluid represents a good practice to preserve the heat-labile components of the processed product
Data Source
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AI summary
The present invention concerns an optimised method for breaking the cell walls of microalgae of the Chlorella genus, more particularly Chlorella vulgaris, Chlorella sorokiniana or Chlorella protothecoides on an industrial scale, implementing very high pressure homogenisation technology for processing microalgae biomass.