Urea Electrooxidation and Electrodialysis for Portable Dialysis Reuse
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Solution Overview
Problem
Existing dialysis systems struggle to remove urea from blood without generating toxic end products, which are costly and unsuitable for portable or wearable applications due to the use of sorbents that add bulk.
Innovation Solution
A device comprising a urea decomposition unit and an electrodialysis unit that oxidizes urea into nitrogen, hydrogen, and carbon dioxide through electrooxidation, using electrodes with transition metals and alkaline polymeric gel, and an electrodialysis unit to adjust pH levels, effectively cleansing renal therapy solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If enzymatic degradation of urea is used, then urea removal is achieved, but toxic ammonium is generated that requires additional sorbents
Solution Approach 1:
The patent changes the chemical reaction pathway by applying electrooxidation instead of enzymatic degradation. This parameter change transforms the degradation mechanism from biological (urease enzyme) to electrochemical, fundamentally altering the products from toxic ammonium to harmless nitrogen gas and carbon dioxide.
Solution Approach 2:
The patent converts the harmful accumulation of ammonium into beneficial nitrogen gas through electrooxidation. The harmful factor (ammonium generation) is transformed into a beneficial outcome (harmless nitrogen gas), eliminating the need for sorbents while maintaining urea removal effectiveness.
2Object-generated harmful factors
If sorbents are employed to bind toxic end products, then toxic substance removal is improved, but device bulk and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for sorbents by fundamentally changing the degradation pathway. Instead of generating toxins that require binding, the electrooxidation process directly converts urea into harmless products, removing the entire sorbent subsystem and its associated bulk and cost.
Solution Approach 2:
The patent eliminates the need for sorbents by converting the harmful degradation pathway into a beneficial one. The electrooxidation process transforms urea directly into harmless nitrogen gas and carbon dioxide, making sorbents unnecessary and thereby reducing device bulk.
3Object-generated harmful factors
If electrooxidation is used to decompose urea, then toxic byproducts are eliminated, but pH control becomes critical
Solution Approach 1:
The patent implements multi-functionality by combining urea decomposition and pH control into a single electrochemical system. The electrodialysis unit with bipolar membranes serves dual purposes: decomposing urea via electrooxidation and simultaneously generating and regulating pH through water electrolysis, eliminating the need for separate control mechanisms.
Solution Approach 2:
The system performs self-regulation of pH through the inherent electrochemical reactions. The bipolar membranes automatically generate H+ and OH- ions during operation, creating a self-balancing pH control mechanism that requires no external intervention or additional control systems.
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 device efficiently removes urea from renal therapy solutions, maintaining a neutral pH and reducing toxic byproducts, making it suitable for reusable and portable dialysis systems.
Implementation Method 1
A device for the removal of urea from a fluid having urea to produce a cleansed fluid... oxidizes urea into nitrogen, hydrogen, and carbon dioxide through electrooxidation
Implementation Method 2
an electrodialysis unit to adjust pH levels, effectively cleansing renal therapy solutions
Data Source
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AI summary
The present disclosure provides devices and methods of using same for cleansing a solution (e.g., a salt solution) of urea via electrooxidation, and more specifically to cleansing a renal therapy solution/dialysis solution of urea via electrooxidation so that the renal therapy solution/dialysis solution can be used or reused for treatment of a patient. In an embodiment, a device for the removal of urea from a fluid having urea to produce a cleansed fluid includes a urea decomposition unit and an electrodialysis unit.