UV LED Water Reactor with TiO2 Catalysts
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Solution Overview
Problem
Current groundwater cleanup techniques are costly, ineffective, and take years to decades to remediate contaminants such as chlorinated solvents, pharmaceuticals, and endocrine disrupting substances, posing risks of further environmental contamination with heavy metals and leached catalysts.
Innovation Solution
A reactor system using a fluoropolymer-coated vessel with ultraviolet light-emitting diodes (LEDs) and titanium dioxide-coated photo-catalyst substrates to degrade organic and biological contaminants, providing a more efficient, environmentally friendly, and portable solution for water remediation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pump and treat technologies are used for groundwater cleanup, then some contamination removal is achieved, but the process is costly, ineffective, and takes years to decades to remediate
Solution Approach 1:
The patent replaces mechanical pump and treat systems with a photochemical oxidation system using UV light and titanium dioxide photocatalysts. This substitution transforms the remediation mechanism from physical extraction to chemical degradation, achieving complete contaminant destruction rather than mere transfer to above-ground storage, thereby improving effectiveness and reducing treatment time.
Solution Approach 2:
The patent changes the fundamental parameter of the remediation process by using photochemical reactions instead of mechanical pumping. The UV light wavelength, photocatalyst surface area, and reaction conditions are optimized to accelerate contaminant degradation kinetics, reducing the remediation timeframe from years to a much shorter period while maintaining high effectiveness.
2Reliability
If traditional photocatalysts are used, then contaminant degradation is achieved, but there is risk of environmental contamination from heavy metals and leached catalysts
Solution Approach 1:
The patent extracts and eliminates the harmful heavy metal components from traditional photocatalysts. By using titanium dioxide, a heavy metal-free material, the system maintains effective photocatalytic contaminant degradation while removing the source of secondary environmental contamination, thus resolving the contradiction between effectiveness and environmental safety.
Solution Approach 2:
The patent employs a stable, non-leaching titanium dioxide photocatalyst that can be easily replaced if needed, rather than using persistent heavy metal-based catalysts that pose long-term environmental risks. This approach prioritizes environmental safety while maintaining degradation effectiveness through the use of benign, disposable photocatalytic materials.
3Reliability
If conventional UV systems are used, then disinfection is achieved, but energy consumption is high and portability is limited
Solution Approach 1:
The patent changes the UV light source parameter from conventional high-power lamps to energy-efficient UV LEDs. This parameter change maintains the necessary UV fluence rate for effective disinfection and photocatalytic activation while dramatically reducing power consumption, enabling portable applications and reducing operational costs.
4Reliability
If conventional UV systems are used, then disinfection is achieved, but the systems are not portable and require extensive infrastructure
Solution Approach 1:
The patent replaces complex mechanical UV lamp systems with solid-state UV LED arrays, eliminating the need for bulky ballasts, high-voltage power supplies, and extensive cooling infrastructure. This substitution enables compact, portable reactor designs that maintain disinfection effectiveness while requiring minimal infrastructure, making the system suitable for field deployments and remote locations.
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 system effectively destroys at least 50% of contaminants, including bacteria and pharmaceuticals, producing potable water with reduced catalyst and energy consumption, and minimizing environmental risks.
Implementation Method 1
At least one ultraviolet light-emitting diode (LED) is included and disposed so as to project ultraviolet light into the reactor vessel
Implementation Method 2
A plurality of photo-catalyst substrates are also disposed within the internal reactor volume of the reactor vessel. Each of these substrates includes a coating of titanium dioxide applied to an outer surface of a substrate
Implementation Method 3
A fluoropolymer coating is applied over at least a portion of the interior surfaces of the reactor vessel
Data Source
AI summary
A reactor system for treating contaminated water is disclosed. The reactor system includes a reactor vessel having first and second end portions and an internal reactor volume defined by interior surfaces of the reactor vessel. A fluoropolymer coating is applied over at least a portion of the interior surfaces of the reactor vessel. The reactor system also includes a water inlet disposed in the first end portion and a water outlet disposed in the second end portion. At least one ultraviolet light-emitting diode (LED) is included and disposed so as to project ultraviolet light into the reactor vessel. A plurality of photo-catalyst substrates are also disposed within the internal reactor volume of the reactor vessel. Each of these substrates includes a coating of titanium dioxide applied to an outer surface of a substrate. A method for remediating contaminated water is also disclosed.