Method and system for treating contaminated materials

WO2025219705A3 Publication Date: 2025-11-27ACCA TECH LTD
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Patent Information

Application Number
PCT/GB2025/050809
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-04-19
Filing Date
2025-04-15
Publication Date
2025-11-27

AI Technical Summary

Technical Problem

Existing soil remediation methods for hydrocarbon-contaminated sand and soil are inefficient, energy-intensive, and environmentally harmful, often requiring significant resources and posing risks to ecosystems and human health, especially in arid landscapes with scarce energy and water resources.

Method used

A method and system utilizing ultrasonic treatment with degassed water and surfactants to form a slurry mixture, followed by acoustic cavitation to dislodge contaminants, combined with mechanical and chemical processes for separation and recycling, achieving minimal resource utilization and efficient contaminant removal.

Benefits of technology

The method and system achieve rapid clean-up times with reduced energy and water consumption, producing soil with <1% hydrocarbon residual content, while being scalable and modular to handle various contaminated materials.

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Abstract

The present invention relates to a method for remediating hydrocarbon-contaminated soil, comprising the steps of: size-reducing the hydrocarbon-contaminated soil particles; mixing the size-reduced soil particles with water to form a slurry mixture, wherein the water is degassed prior to or during mixing within a processing vessel; subjecting the slurry mixture to ultrasonic treatment to induce acoustic cavitation and dislodge contaminants from the soil particles; separating the cleaned soil particles from the slurry mixture; and washing the cleaned soil particles with clean water to remove contaminants.
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