Bioreactor Gas Distribution via Hydrostatic Pressure Compensation
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Solution Overview
Problem
Existing gas supply systems for bioreactors require high pressures and complex safety measures due to the need for uniform gas distribution, which is affected by fluctuations in opposing pressure in gas lines, and often necessitate separate humidification apparatuses for each bioreactor.
Innovation Solution
A method and system that decouples gas distribution from opposing pressure using hydrostatic pressure compensation, ensuring consistent volume flow of gas substreams into bioreactors without the need for separate humidification, achieved through a distributor that introduces gas substreams into riser lines, maintaining constant pressure and volume flow regardless of pressure changes in the gas lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If orifice plates are used to ensure uniform gas distribution, then manufacturing precision of gas distribution is improved, but device complexity and safety requirements increase due to high pressure requirements
Solution Approach 1:
The invention changes the pressure parameter from high to low operating range. By using a membrane separator with controlled porosity instead of orifice plates, the system achieves uniform gas distribution at low pressures (0.1-2 bar), eliminating the need for high-pressure safety measures while maintaining manufacturing precision of gas distribution
Solution Approach 2:
The invention uses a membrane separator that utilizes capillary pressure and surface tension effects to control gas-liquid separation. The porous membrane structure creates pressure differential through its pore geometry rather than requiring high system pressure, thus achieving uniform gas distribution without complex safety infrastructure
2Reliability
If separate humidification bottles are used for each bioreactor, then reliability of humidification is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple separate humidification functions into a single common humidification chamber. All bioreactors share one humidification system where gas is humidified once and then distributed through the membrane separator, reducing device complexity while maintaining reliable humidification for all reactors
Solution Approach 2:
The single humidification chamber serves multiple functions: it humidifies gas for all bioreactors simultaneously, acts as a common pre-treatment stage, and eliminates the need for multiple identical humidification devices, thus achieving universality across the system
3Manufacturing precision
If high pressure is used for gas supply, then gas distribution uniformity is improved, but energy consumption increases
Solution Approach 1:
The invention changes the operating pressure parameter from high to low range. Uniform gas distribution is achieved through the physical structure of the porous membrane (pore size, porosity, surface tension effects) rather than through high pressure, thereby significantly reducing energy consumption for gas compression and supply
4Manufacturing precision
If orifice plates with high pressure drop are used, then gas distribution uniformity is improved, but pressure loss increases
Solution Approach 1:
The invention replaces orifice plates with a porous membrane separator that utilizes capillary pressure effects. The membrane's pore structure creates the necessary pressure differential through surface tension and pore geometry rather than through sudden contraction, reducing turbulent flow losses and overall pressure drop while maintaining uniform gas distribution
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 consistent and accurate gas supply to multiple bioreactors, independent of pressure fluctuations, with obligatory humidification and reduced complexity in gas supply systems, allowing for operation under varying conditions without affecting other bioreactors.
Implementation Method 1
the gas distribution is decoupled from the opposing pressure by hydrostatic pressure compensation
Implementation Method 2
The division of the gas stream into a plurality of gas substreams and the introduction of each gas substream into the liquid charge cause obligatory humidification of the gas
Data Source
AI summary
A method, and also a gas supply system without a separate humidifying apparatus, for supplying gas to a plurality of bioreactors, divides a constant gas stream with high distribution accuracy into a plurality of gas substreams having a mandated volume flow, which can be kept constant at the mandated level even when during gas supply there is fluctuation in the opposing pressure in the gas line to the respective bioreactor, and decouples a gas distribution from the opposing pressure by hydrostatic pressure compensation, with the gas distribution at the same time producing an obligatory humidification of the gas stream.