BENEV's Thermal Oxidation Process
The BENEV system at the Récupère Sol Treatment Facility is currently permitted to handle up to 10 tonnes of material per hour, depending on the type of material, the contaminants, its BTU content and moisture level.
The primary combustion chamber operates at 650 to 800ºC. In this chamber, all organic molecules are vaporized. This gas enters the secondary combustion chamber where air and fuel is injected and complete oxidation occurs at >1,000ºC. A control system monitors and regulates the process for purposes of safety and maximizing oxidation efficiency.
To upgrade the initial permit, a triplicate test burn for soil contaminated with PCBs was completed at the RSI Plant in August 1997. Measured destruction removal efficiency (DRE) was >99.99999% (the minimum required is 99.9999%). The combustion efficiency (CE) was >99.99985% (the minimum required is 99.9%).
Subsequent annual test burns confirm the continued, better than requirements, process destruction and removal efficiency. Testing on treated soil resulted in organic contaminant concentrations that were either non-detectable or were at the detection limit for organics. These test results confirm the high standard performance of the BENEV Thermal Oxidizer.
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