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| Resource Library > Technology Transfer > Programs and Initiatives > Off-gas Treatment |
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Remediation systems, such as bioventing or soil vapor extraction, which require air to penetrate
through contaminated media to stimulate biological activity, can lead to uncontrolled emissions of contaminant vapor. In some states, off-gas treatment is
required to meet state air-quality standards.
The choice of off-gas treatment depends largely on the characteristics of the contaminant vapor. Fuels are combustible organic compounds that can be treated
by either separating organic compounds from the vapor stream or by chemically transforming (combustion/oxidation) the organic into harmless end products.
Chlorinated solvents are not easily amenable to transformation approaches because the end products usually include hydrogen chloride, which has corrosive
attributes. AFCEE has successfully investigated four approaches to off-gas treatment. These include an internal combustion engine, a regenerative resin system,
a flameless thermal oxidizer, and biofiltration. Performance and cost evaluations of technologies are available:
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