Bioreactor System With Dialyzer Membrane For Waste Removal
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Solution Overview
Problem
Bioreactors face challenges in maintaining optimal cell culture conditions due to accumulation of waste products like lactic acid and ammonia, which can be toxic and deplete nutrients, requiring complete medium replacement that disrupts cell growth and can lead to cell loss.
Innovation Solution
A bioreactor system with a treatment unit that recycles the culture medium by removing waste products using a dialyzer with a semi-permeable membrane, allowing for continuous supply of fresh medium without interrupting cell culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the culture medium is completely replaced to remove waste products, then the waste products are removed effectively, but the cell culture is disrupted and cells are lost during the replacement process
Solution Approach 1:
The bioreactor system is divided into two separate tanks: a first tank for cell culture and a second tank for waste product removal. This segmentation allows the culture medium to be divided into cell-containing portions and waste-containing portions, enabling waste removal without disrupting the cell culture environment
Solution Approach 2:
A semi-permeable membrane is introduced as an intermediary between the first tank (cell culture) and second tank (waste removal). This membrane allows selective passage of substances - enabling waste products to be removed while preventing cells from escaping, thus mediating the conflict between waste removal and cell culture continuity
2Quantity of substance
If the culture medium is completely replaced to restore nutrient levels, then nutrient depletion is resolved, but the cell culture process is interrupted and productivity decreases
Solution Approach 1:
The system enables continuous cell culture by maintaining a constant supply of nutrients through the dual-tank configuration. While cells remain in the first tank continuously culturing, the culture medium is continuously refreshed through the second tank, ensuring uninterrupted nutrient availability and continuous productivity
Solution Approach 2:
The system discards waste products in the second tank while recovering and reusing the cleaned culture medium back in the first tank. This creates a continuous cycle where nutrients are recovered and reused, maintaining continuous nutrient availability without interrupting cell culture
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
Enables continuous cell culture by maintaining optimal medium conditions, preventing cell loss and nutrient depletion, while effectively removing waste products, thus promoting healthy cell growth.
Implementation Method 1
A bioreactor system with a treatment unit that recycles the culture medium by removing waste products using a dialyzer with a semi-permeable membrane
Data Source
AI summary
A bioreactor system includes a bioreaction unit configured to accommodate a culture medium, and a treatment unit configured to recycle the culture medium transferred from the bioreaction unit, wherein the treatment unit includes a treatment tank which accommodates the culture medium transferred from the bioreaction unit, a culture medium exchange part configured to exchange the culture medium between the bioreaction unit and the treatment tank, and a waste product removal part configured to remove waste products contained in the culture medium accommodated in the treatment tank.