Distributed Bioreactor System with Modular Segmentation
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Solution Overview
Problem
Conventional bioreactor scale-up techniques face challenges such as reduced performance due to mass transfer issues, variability in operational and performance characteristics at each scale-up step, and the need for sterilization of bioreactor components, leading to technical and financial risks, as well as difficulties in satisfying regulatory and safety requirements.
Innovation Solution
A distributed bioreactor system with modular, plug-and-play peripheral bioreactors that can be easily scaled up by coupling additional units to a central nurse bioreactor, maintaining one-way fluid communication and isolation to prevent contamination, allowing for continuous operation and real-time control without the need for sterilization of the entire system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If conventional scale-up techniques are used to increase bioreactor volume, then manufacturing capacity is improved, but mass transfer performance deteriorates leading to reduced biological activity
Solution Approach 1:
The system divides a large bioreactor volume into multiple smaller modular bioreactors (e.g., four 2L bioreactors instead of one 8L bioreactor). Each module maintains optimal mass transfer characteristics while collectively achieving the desired total volume. The modular units can be independently operated and scaled by adding or removing modules.
2Productivity
If bioreactor scale-up steps are increased to achieve manufacturing volume, then productivity is improved, but operational variability increases making reproducibility difficult
Solution Approach 1:
The system uses identical modular bioreactor units that can be replicated to achieve any scale. Each module has the same design, control system, and operational parameters, ensuring consistent performance across all units. This eliminates the variability introduced by scaling up to different sizes while maintaining reproducibility.
Solution Approach 2:
The system maintains constant operational parameters (temperature, pH, agitation speed, aeration rate) across all modular units regardless of total system size. By keeping critical parameters unchanged and only increasing the number of modules, the system achieves scaling without compromising operational consistency or reproducibility.
3Reliability
If conventional sterilization procedures are applied at each scale-up step, then contamination risk is reduced, but system complexity and processing time increase
Solution Approach 1:
The system employs disposable single-use bioreactor modules that are pre-sterilized and sealed. Each module is used once and then discarded, eliminating the need for complex sterilization procedures. The disposable nature ensures sterility while simplifying the overall process and reducing validation requirements.
4Productivity
If modular bioreactors are coupled to scale up the system, then productivity is improved, but contamination risk increases due to additional connection points
Solution Approach 1:
Each modular bioreactor unit is a disposable, pre-sterilized component with sealed connections. The modules are connected via sterile barriers or sealed interfaces that prevent contamination during assembly. Since each module is used once and discarded, there is no risk of cross-contamination between uses, and the sealed design eliminates exposure to non-sterile environments during operation.
Data Source
AI summary
Embodiments provide a distributed bioreactor system in which a plurality of modular bioreactors are operated in parallel to produce and maintain a biological cell culture. A central or nurse perfusion bioreactor produces and maintains a cell culture and transfers portions of the cell culture to a plurality of modular peripheral perfusion bioreactors, each of which produces and maintains the cell culture in turn. In order to prevent contamination and facilitate segregation of particular peripheral bioreactors, the distributed system is configured such that one-way fluid communication is established from the central/nurse bioreactor to each of the peripheral bioreactors while maintaining fluid isolation among the peripheral bioreactors. Each modular peripheral bioreactor unit has a plug-and-play configuration and may be plugged into or otherwise coupled to the central/nurse bioreactor to scale up the overall size of the cell culture without requiring sterilization or redesign or reconfiguration of the system.