Pre-programmed Continuous Cell Culture Feeding via Mass Balance
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Solution Overview
Problem
Current cell culture feeding methods, such as bolus feeding, are inefficient as they do not provide precise nutrient quantities, leading to overfeeding, waste accumulation, and variability in cell culture performance due to manual operation and reliance on instrument feedback.
Innovation Solution
A continuous feeding method that determines preferred nutrient consumption and growth rates to maintain optimal nutrient levels without feedback control, using a controller module to adjust the flow rate of nutrients based on empirically or modeled values, ensuring consistent and automated nutrient delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bolus feeding is used to simplify the feeding operation, then ease of operation is improved, but manufacturing precision deteriorates due to inability to provide precise nutrient quantities
Solution Approach 1:
The patent replaces manual mechanical feeding operations with an automated computer-controlled system that calculates and delivers precise nutrient quantities based on cell culture parameters, eliminating the imprecision of manual bolus feeding while maintaining operational simplicity through automation
Solution Approach 2:
The system dynamically changes feeding parameters (flow rate, timing, nutrient composition) based on real-time cell culture measurements and predictive algorithms, transitioning from fixed bolus doses to adaptive continuous or semi-continuous feeding that maintains precision while simplifying operator intervention
2Manufacturing precision
If continuous feeding is used to improve nutrient delivery precision, then manufacturing precision is improved, but device complexity increases due to automation requirements
Solution Approach 1:
The system incorporates automated sensors, controllers, and algorithms that enable the feeding system to self-regulate nutrient delivery based on real-time cell culture conditions, reducing the need for complex manual intervention and operator training while maintaining high precision
Solution Approach 2:
The patent implements feedback control loops where cell culture parameters (cell density, metabolite levels) are continuously monitored and fed back to the control system, which automatically adjusts feeding rates to maintain optimal nutrient levels, simplifying the overall system through intelligent control rather than mechanical complexity
3Device complexity
If manual bolus feeding is used to reduce equipment requirements, then device complexity is reduced, but productivity deteriorates due to operator time consumption and variability
Solution Approach 1:
The patent transitions from intermittent bolus feeding to continuous or semi-continuous nutrient delivery, ensuring constant optimal nutrient supply to cell cultures without interruption or operator intervention, thereby maximizing cell growth and protein production efficiency while using standardized automated equipment
4Adaptability or versatility
If feedback control is used to adapt to changing cell culture needs, then adaptability is improved, but reliability deteriorates due to instrument variability and operator intervention
Solution Approach 1:
The system uses predictive algorithms and pre-established cell culture growth models to calculate optimal feeding strategies, creating a virtual model of cell culture needs that guides automated feeding decisions, thereby achieving consistent adaptive responses without relying on variable operator judgment or instrument feedback
Data Source
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AI summary
A pre-programmed non-feedback continuous feeding method based on mass balance of the substrate in the bioreactor for use in cell culture growth and maintenance is provided. The disclosed method does not rely on instrument, probe or operator feedback. The method provides an efficient and effective alternative to bolus feeding.