Gravity-Driven Bioreactor for Stress-Free Microorganism Transport
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Solution Overview
Problem
Existing bioreactors for phototrophic microorganisms and photocatalytic processes subject microorganisms to stress due to high pressure, negative pressure, high acceleration, or squeezing during medium transport, leading to damage and reduced photosynthetic or photocatalytic capabilities.
Innovation Solution
A method where the reaction medium is conducted perpendicularly or inclined through a reactor in a meander-shaped way, allowing continuous introduction and removal without pressure, utilizing hydrostatic pressure compensation to create a stress-free flow, with additives introduced at the bottom to promote diffusion and turbulence, and gaseous products removed through the medium surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If customary pumping methods are used to transport the reaction medium, then the transport can be carried out efficiently, but the microorganisms are subjected to stress (high pressure, negative pressure, high acceleration) which damages them and reduces photosynthetic capabilities
Solution Approach 1:
The patent applies hydraulic principles by using gravity-driven flow through vertically arranged reactor elements. The reaction medium flows from the uppermost element downward through interconnected lower-side openings, eliminating the need for mechanical pumps. This hydraulic approach maintains stress-free conditions for microorganisms while achieving continuous transport through gravitational potential energy conversion.
Solution Approach 2:
The reactor is segmented into multiple vertically arranged reactor elements with interconnected openings at their lower sides. This segmentation allows the reaction medium to flow sequentially through each element under gravity, creating a stepped hydraulic path that eliminates the need for high-pressure pumping while maintaining continuous flow and reducing stress on microorganisms.
2Speed
If the reaction medium is transported with high pressure or acceleration, then the flow rate increases, but the microorganisms and molecules are destroyed or damaged and require additional time and metabolic products for regeneration
Solution Approach 1:
The reactor elements are arranged vertically with interconnected openings at their lower sides, creating a gravity-driven equipotential flow path. The reaction medium flows downward through each element under gravitational force alone, without additional pressure or acceleration. This equipotential approach maintains microorganism integrity while achieving continuous flow through potential energy conversion.
3Ease of operation
If pumps are used to conduct the reaction medium through the bioreactor, then continuous flow is achieved, but the microorganisms are damaged and photosynthetic capabilities are reduced
Solution Approach 1:
The reactor system uses self-service gravity-driven flow where the reaction medium automatically flows from the uppermost reactor element through the vertically arranged elements and out through the lowermost element. This self-service hydraulic system achieves continuous flow capability without external pumps, thereby eliminating mechanical stress and damage to microorganisms while maintaining operational continuity.
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 method enables gentle transport of microorganisms, minimizes damage, and optimizes energy use, light distribution, and gas recovery, while maintaining process efficiency and reducing pollutant levels.
Implementation Method 1
both an introduction and removal of the reaction medium into and from the reactor are preferably carried out continuously, without pressure and freely to the atmosphere via the upper reaction medium surface, wherein due to the hydrostatic pressure compensation and leveling a flow of the reaction medium that is stress-free for the microorganisms is produced
Implementation Method 2
additives introduced at the bottom to promote diffusion and turbulence
Data Source
AI summary
Photochemical process and device adapted to breed, produce, or hydrocultivate microorganisms. The process includes conveying a reaction medium in a reactor in a meander-shaped way that includes moving the reaction medium along a direction that perpendicularly or inclined at an angle to an imaginary horizontal plane, wherein, during the conveying, the reaction medium moves in the reactor at least once along a first direction defined as one of a top down direction and a direction of gravity, moves in the reactor at least once along a second direction defined as one of a bottom up direction and against the direction of gravity, and moves in the reactor one of freely under atmospheric pressure and while exposed to the atmosphere. The process also includes introducing into and removing from the reactor the reaction medium in a continuous manner.