Trailer Mounted Thermal Oxidizer Unit for Environmental Site Remediation
Executive Summary
Epcon delivered a self-contained, trailer-mounted thermal oxidizer unit designed for environmental-site remediation, enabling safe, flexible, mobile destruction of volatile organic compounds (VOCs) and other contaminants extracted from soils or soils/groundwater during cleanup projects. The unit achieves a destruction-removal efficiency (DRE) greater than 99%, accommodates widely varying gas flow rates and contaminant loads, and offers a cost-effective, low-maintenance remediation solution — ideal for remote or temporary sites.
Project Overview
The project targeted soil remediation at sites contaminated by oil-drilling rigs or chemical storage — typical sources of VOCs and hazardous pollutants in soil. The remediation process extracts contaminated air/gases from soil vapor extraction (SVE) or related cleanup methods. These off-gases require reliable destruction before release to atmosphere.
Epcon engineered and supplied a fully self-contained, trailer-mounted thermal oxidizer unit, allowing deployment directly on-site. The system is designed for high destruction efficiency, built-in flexibility to handle variable flow and contaminant loads, and easy transport, making it suitable for remote, temporary or multi-site remediation projects.
The Challenge
Site remediation of contaminated soil often involves:
- Highly variable exhaust/vapor stream loads — depending on soil conditions, extraction rates, contaminant concentrations, and the remediation phase. The treatment system must handle a wide “turn-down ratio” (i.e. large swings from low to high flow/concentration) reliably.
- Requirement for high pollutant destruction efficiency (DRE) — to ensure that VOCs, hazardous air pollutants (HAPs), and other volatile contaminants are converted into harmless byproducts (CO₂, H₂O) before release or heat recovery, ensuring compliance with environmental regulations.
- Need for mobility and flexibility — many contaminated-site projects are temporary or spread across multiple locations; a fixed oxidizer with permanent ductwork may be impractical or economically unfeasible.
- Cost, installation and maintenance realism — remediation budgets often rely on minimizing capital cost, installation effort, and ongoing maintenance — especially for projects with limited duration or uncertain scope.
The Solution
Epcon provided a Trailer-Mounted Thermal Oxidizer System tailored for remediations, with these core features:
- Self-contained trailer design: The oxidizer, combustion chamber, controls, and all necessary systems are mounted on a mobile trailer — allowing transport by truck to different sites, and enabling rapid deployment without civil-work or permanent ductwork.
- High-efficiency thermal oxidation process: The oxidizer destroys VOCs/HAPs in the extracted soil vapor / off-gas stream by combustion, converting pollutants into CO₂ and H₂O — following standard thermal-oxidizer principles.
- Wide turndown / modulating burner for variable flow & concentration: The system is engineered to adjust to fluctuating flow rates and solvent/contaminant concentrations, maintaining DRE > 99% even under low or high load conditions.
- Zero-infrastructure or minimal-installation requirement: Since the unit is trailer-mounted and self-sufficient, there’s no need for permanent installation, ductwork, or site modifications — reducing upfront cost and speeding up mobilization.
Technical Specifications
Unit Type: Trailer-mounted Thermal Oxidizer for environmental site remediation (soil-vapor / contaminated soil off-gas)
Destruction Efficiency: DRE > 99% for VOCs/HAPs — ensuring compliant emissions treatment and safe exhaust
Flow / Load Flexibility: Large turn-down ratio: capable of handling widely varying vapor flow rates and contaminant concentrations via modulating burner / adjustable flow control
Mobility & Deployment: Fully self-contained on mobile trailer — transportable to remote or temporary sites; no permanent ducting or civil installation required
Operation Mode: Combustion-based thermal oxidation: contaminated off-gas drawn in, heated, combusted; clean exhaust vented post-oxidation or reused if heat-recovery is integrated
Maintenance & Costs: Low-installation cost, low fixed infrastructure cost — suitable for temporary or short-term remediation projects; maintenance requirements minimal relative to fixed systems
The Results
After deployment, the trailer-mounted oxidizer provided:
- Effective VOC/HAP destruction even with variable loads — the system maintained high destruction efficiency across varying flow rates and contamination levels, making it reliable for soil-remediation exhaust.
- High operational flexibility and mobility — remediation teams could relocate the oxidizer between sites or across a site as needed — ideal for cleanup operations with shifting extraction points or multiple contaminated zones.
- Reduced capital and installation cost vs. fixed systems — no need for permanent installation, ductwork, or infrastructure, making it cost-effective for temporary or interim clean-up assignments.
- Lower total cost of ownership for soil-remediation projects — reduced upfront investment, flexible deployment, and minimal maintenance requirements — all helping lower overall project costs.
- Regulatory compliance & environmental safety — by reliably destroying VOCs and hazardous emissions, the solution supports compliance with air-quality regulations and reduces risk of uncontrolled pollutant release.
- Scalability and adaptability for future use — the mobile oxidizer can be reused for additional remediation projects, leased, redeployed or relocated — giving it long-term value beyond a single site.
