Actively Aerated Bioreactor for Controlled Hyphal Matrix Morphology
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Solution Overview
Problem
Existing bioreactor systems for producing secondary extra-particle hyphal matrices face limitations in controlling morphology and properties due to passive diffusion of oxygen and temperature, leading to restricted scalability and increased morphological heterogeneity.
Innovation Solution
A Type II actively aerated static packed-bed bioreactor system is used, where a pre-conditioned air stream is passed through a substrate inoculated with filamentous fungus, allowing for direct modification of gas and temperature inputs to control the development of an isotropic inter-particle hyphal matrix, which then forms an extra-particle hyphal matrix with controlled morphology and properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If passive diffusion of oxygen and temperature is used in Type I tray-based bioreactors, then the system is simple to operate, but the scalability is restricted and morphological heterogeneity increases
Solution Approach 1:
The patent replaces passive diffusion (natural physical process) with active aeration (mechanical system). A sparged stirred-tank bioreactor uses mechanical agitation and controlled gas sparging to deliver oxygen directly to the liquid medium, substituting the passive diffusion mechanism of tray-based systems. This enables scalable production while maintaining operational control through mechanical parameters.
Solution Approach 2:
The patent changes the fundamental operating parameters from passive diffusion conditions to active aeration parameters. By controlling agitation speed, sparging rate, and dissolved oxygen levels, the system transitions from diffusion-limited oxygen transfer to controllable oxygen supply, enabling both scalability and morphological control through parameter adjustment.
2Device complexity
If passive diffusion is used for gas exchange in tray-based bioreactors, then the device complexity is low, but the manufacturing precision of mycological material morphology deteriorates
Solution Approach 1:
The patent uses parameter changes to control morphology by adjusting dissolved oxygen levels, agitation speed, and sparging rates. These parameters directly influence hyphal differentiation and secondary mycelium formation, enabling precise morphological control. The transition from passive to active aeration parameters provides multiple control levers for morphology optimization.
Solution Approach 2:
The patent implements feedback control through dissolved oxygen sensors and control systems that adjust aeration and agitation in real-time. This closed-loop feedback enables precise control of oxygen transfer rates, which directly affects fungal morphology. The system monitors and adjusts parameters to maintain optimal conditions for desired morphological outcomes.
3Productivity
If actively aerated packed-bed bioreactor is used, then the productivity and scalability are improved, but the device complexity increases
Solution Approach 1:
The patent employs a multi-functional bioreactor design that combines sparging, agitation, heating/cooling, and pH control in a single vessel. This universal platform can produce different mycological materials by adjusting operational parameters rather than requiring different equipment, thereby managing complexity through parameter flexibility rather than structural complexity.
Solution Approach 2:
The patent uses pneumatic sparging systems to deliver oxygen through gas bubbles injected into the liquid medium. This hydraulic/pneumatic approach enables efficient oxygen transfer and mixing without complex mechanical agitation systems, simplifying the aeration function while maintaining high productivity and scalability.
4Extent of automation
If diffusion-based gas exchange is used, then the system requires less active control, but the morphological heterogeneity of the product increases
Solution Approach 1:
The patent uses parameter changes to control morphology by adjusting dissolved oxygen levels, agitation speed, and sparging rates. These parameters directly influence hyphal differentiation and secondary mycelium formation, enabling precise morphological control. The transition from passive to active aeration parameters provides multiple control levers for morphology optimization.
Solution Approach 2:
The patent implements feedback control through dissolved oxygen sensors and control systems that adjust aeration and agitation in real-time. This closed-loop feedback enables precise control of oxygen transfer rates, which directly affects fungal morphology. The system monitors and adjusts parameters to maintain optimal conditions for desired morphological outcomes.
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 efficient production of mycological materials with controlled morphology and properties, simplifying the manufacturing process and increasing scalability, while reducing the need for complex airflow systems and active gas composition control.
Implementation Method 1
a pre-conditioned air stream is passed through a substrate of discrete elements inoculated with a filamentous fungus for diffusion between the discrete elements
Implementation Method 2
Type II actively aerated and unmixed bioreactors... with air actively introduced from either end of the particle bed with forced diffusion through the particle matrix
Data Source
AI summary
The invention describes a methodology for production of a secondary extra-particle fungal matrix for application as a mycological material, manufactured via a Type II actively aerated static packed-bed bioreactor. A pre-conditioned air stream is passed through a substrate of discrete elements inoculated with a filamentous fungus to form an isotropic inter-particle hyphal matrix between the discrete elements. Continued feeding of the air through the substrate of discrete elements and isotropic inter-particle hyphal matrixes develops an extra-particle hyphal matrix that extends from an isotropic inter-particle hyphal matrix in the direction of airflow into a void space within the vessel.