Using in-situ hot air/steam stripping (HASS) of hydrocarbons in soils
- NOVATERRA, Inc., Los Angeles, CA (United States)
The remediation of soils containing volatile (VOC) and semi-volatile (SVC) hydrocarbons is most desirably accomplished in-situ, i.e., without removal of the contaminated soils from the ground. This approach mitigates the environmental problem, i.e., does not transport it to another location, and when properly applied, does not impact on the local environment during remediation NOVATERRA has demonstrated commercially an in-situ, hot air/steam stripping (HASS) technology to remove VOC and SVC from soils both in the vadose and saturated zones. The technology consists of a drill tower which injects and mixes steam and hot air continuously into the soil below ground and a method to immediately capture all vapors escaping to the surface and remove the vaporized VOC/SVC using condensation and carbon beds. The air can be recompressed and recycled. The condensed liquid containing hydrocarbons is purified by distillation. The recovered hydrocarbons can be destroyed or recycled. The technology has successfully removed various chlorinated aliphatics and aromatics, glycol ethers, phthalates, polyaromatic compounds, ketones, petroleum hydrocarbons and many other compound types from sand to clay soils to risk based standards; e.g. 1 increased cancer risk in 1,000,000 using currently acceptable risk assessment standards.
- OSTI ID:
- 77997
- Report Number(s):
- CONF-9406319-; TRN: IM9531%%47
- Resource Relation:
- Conference: HazMat `94: international environmental management and technology conference and exhibition, Philadelphia, PA (United States), 15-17 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of HazMat 94 international. Twelfth annual environmental management and technology conference international: Proceedings; PB: 696 p.
- Country of Publication:
- United States
- Language:
- English
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