Co-electrospun Microtubes for Bacterial Cell Attachment
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Solution Overview
Problem
Current methods for water purification, such as those using granulated active carbon, are inefficient and costly due to the need for continuous carbon source addition and are ineffective against toxic heavy metals and organic pollutants like atrazine, which require bacterial strains like Pseudomonas ADP for degradation.
Innovation Solution
A method involving co-electrospinning of polymeric solutions to create microtubes with attached or encapsulated bacterial cells or membrane-coated particles, allowing for effective degradation and removal of contaminants through bioremediation, without the need for additional carbon sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If granulated active carbon is used for water purification, then organic compounds can be degraded, but continuous carbon source addition is required which increases operational costs and promotes other bacterial growth
Solution Approach 1:
The patent applies preliminary action by pre-embedding bacterial cells within the electrospun microtube structure before deployment. The microtube is fabricated with bacterial cells already incorporated and protected within the porous polymer matrix, eliminating the need for continuous external carbon source addition. The cells utilize the structural framework and trapped nutrients within the microtube itself, performing the degradation function autonomously without requiring ongoing external carbon supplementation.
2Duration of action of stationary object
If granulated active carbon particles are used, then organic pollutants can be removed, but the particles are only effective for a limited time and require continuous replenishment
Solution Approach 1:
The patent implements continuity of useful action through the electrospun microtube structure that maintains a stable, long-lasting purification environment. The porous polymer matrix continuously traps and facilitates bacterial cell activity without degradation over time. The microtube's structural integrity and the embedded cells' metabolic continuity enable prolonged operation without the limited effectiveness period inherent in granulated carbon particles, which require continuous replenishment.
3Reliability
If bacterial strains are used to degrade toxic chemicals, then water purification is achieved, but the bacteria require continuous carbon source supply to maintain activity
Solution Approach 1:
The patent applies self-service by designing the microtube to be self-sufficient for bacterial cell maintenance. The electrospun porous structure traps and retains the bacterial cells while providing a stable environment that eliminates the need for external carbon source supplementation. The microtube itself serves as the functional unit, with its porous framework and trapped nutrients supporting continuous bacterial activity without requiring external carbon inputs, thereby achieving self-maintaining degradation functionality.
4Reliability
If electrospun microtubes with attached cells are created, then bacterial activity is maintained and contaminants are degraded, but the microtube structure must be carefully constructed to preserve cell viability
Solution Approach 1:
The patent applies parameter changes by optimizing the electrospinning process parameters to create a porous polymer matrix with specific pore size, surface area, and structural characteristics that preserve bacterial cell viability. By controlling factors such as polymer type, solvent composition, electrospinning voltage, and flow rates, the microtube structure is tuned to provide an environmentally friendly matrix that maintains cell metabolic activity while facilitating contaminant degradation, thus achieving reliable cell functionality through controlled parameter adjustment.
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
The microtubes enable efficient degradation and removal of contaminants like atrazine and heavy metals, maintaining bacterial activity and reducing operational costs by eliminating the need for continuous carbon source addition, while providing a sustainable solution for water purification.
Implementation Method 1
electrospinning process... applying electrostatic forces to a polymeric solution
Implementation Method 2
The resulting framework is porous and can be used to attach, trap or encapsulate cells or other objects of interest... providing a large surface area for bacterial cell attachment
Data Source
AI summary
A method of attaching a cell or a membrane-coated particle-of-interest to a microtube is provided. The method comprising: co-electrospinning two polymeric solutions through co-axial capillaries, wherein a first polymeric solution of the two polymeric solutions is for forming a shell of the microtube and a second polymeric solution of the two polymeric solutions is for forming a coat over an internal surface of the shell, the first polymeric solution is selected solidifying faster than the second polymeric solution and a solvent of the second polymeric solution is selected incapable of dissolving the first polymeric solution and wherein the second polymeric solution comprises the cell or the membrane-coated particle-of-interest, thereby attaching the cell or the membrane-coated panicle-of-interest to the microtube. Also provided are microtubes with attached, entrapped or encapsulated cells or membrane-coated particles and methods of using same.