Low Temperature Thermal Treatment for Soil Remediation
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Solution Overview
Problem
Current remediation methods for organic chemicals in soil and groundwater are often invasive, costly, and can further contaminate the environment, lacking sustainability and efficiency.
Innovation Solution
The use of low temperature heating devices, such as electrically powered heaters, to enhance abiotic and biologically mediated chemical reactions, maintaining temperatures between 30 to 100°C to facilitate in situ remediation without vaporization or adverse byproducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high temperature thermal treatment is used to remediate organic chemicals, then degradation rate is improved, but vaporization and release of harmful byproducts occurs
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperature (above 100°C) to low temperature (below 100°C, typically 20-90°C) thermal treatment. This parameter change accelerates abiotic degradation reactions while preventing vaporization and release of harmful byproducts, as demonstrated by the enhanced hydrolysis rates at lower temperatures compared to conventional thermal methods.
Solution Approach 2:
The patent applies localized heating through subsurface heating elements that deliver heat directly to the contaminated zone. This creates a localized thermal field that enhances degradation reactions in the target area while maintaining lower temperatures in surrounding areas, preventing widespread vaporization and harmful emissions.
2Reliability
If conventional thermal remediation is used, then remediation effectiveness is improved, but infrastructure damage and subsidence occur
Solution Approach 1:
The patent changes the temperature parameter to below 100°C, which prevents the harmful effects of high temperature including infrastructure damage and subsidence. The low temperature thermal treatment maintains remediation effectiveness by enhancing abiotic degradation reactions without causing the thermal damage associated with conventional high temperature methods.
3Quantity of substance
If traditional remediation methods are used, then contaminant removal is achieved, but environmental contamination and invasiveness increase
Solution Approach 1:
The patent converts the naturally occurring abiotic degradation processes into a beneficial remediation mechanism by applying low temperature thermal enhancement. Instead of introducing harmful chemicals or invasive excavation methods, the patent uses gentle heating to accelerate existing benign degradation pathways, transforming natural processes into an effective remediation solution.
Solution Approach 2:
The patent enables the contaminated environment to self-cleanup by enhancing its natural abiotic degradation capacity through low temperature heating. The system uses the environment's own degradation mechanisms (hydrolysis, oxidation) and accelerates them thermally, eliminating the need for external chemical additives or invasive removal methods.
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 significantly accelerates the degradation of organic chemicals, reducing cleanup times and costs, while minimizing environmental impact and allowing for remediation in populated areas without damaging infrastructure.
Implementation Method 1
The heaters may be comprised of a variety of mechanisms; certain traditional methods use piping where heated fluids are run through such piping, while other mechanisms may rely on electrical current to generate heat. In some embodiments of the invention, the heaters are comprised of rods and/or wires with a heat transmissive outer shell wherein an electrical wire is run into the rod and/or wires and then out again, with the wire made of a material configured to provide some electrical resistance and generate an embodiment-appropriate amount of heat.
Implementation Method 2
For example, carbon tetrachloride, a common chlorinated solvent organic chemical, will degrade in the subsurface in the presence of water due to abiotic hydrolysis reaction mechanisms
Implementation Method 3
whereas benzene, toluene, ethylbenzene, and xylenes (BTEX), and petroleum hydrocarbons can be degraded by bacteria in the presence of oxygen
Data Source
AI summary
A system for the low-temperature remediation of a target volume comprised of at least one material, the system comprising: one or more heaters, wherein the one or more heaters are configured to connect to a power source and emit heat into their surrounding area at substantially uniform rates and the one or more heaters are at least partially embedded into the target area: a power control and monitoring system configured to deliver voltage and current to the one or more heaters at a substantially uniform rate; and a power source configured to deliver voltage and current to the power control and monitoring system for distribution.