Performance of the PADRE{reg{underscore}sign} A3100 unit to control vapor emissions from a soil vapor extraction system
An innovative adsorption/regeneration treatment system is being used to treat vapor emissions from a soil vapor extraction (SVE) system installed to remediate a site affected by volatile organic compounds (VOCs). The SVE system uses high vacuum (15 inches of mercury) to extract soil vapor from 24 vadose zone wells. The chemicals of concern include trichloroethene (TCE); tetrachloroethene (PCE); 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113); and other halogenated and nonhalogenated solvents. The vapor control system is a PADRE{reg{underscore}sign} A3100 unit manufactured by Thermatrix, Inc., that features two adsorption/desorption beds filled with a carbonaceous adsorbent resin. While one bed adsorbs VOCs, the second regenerates using heat and nitrogen gas stripping. The concentrated VOC vapor in the regenerative gas stream is condensed and an end product of solvent and water is recovered. The PADRE{reg{underscore}sign} A3100 unit was selected for this application over traditional vapor-phase granular activated carbon (GAC) adsorption systems, thermal oxidation systems, and other regenerative-type systems using steam. The selection was based on operation and maintenance requirements and costs, as well as waste- handling requirements. To date, the PADRE{reg{underscore}sign} A3100 unit has performed above expectations: after 14 months of operation it has not required significant maintenance, while recovering approximately 20,000 pounds of solvent from the vapor stream. During this same period, the VOC recovery efficiency by the PADRE{reg{underscore}sign} A3100 has been approximately 93%, and operating availability has exceeded 90%.
- Research Organization:
- Geomatrix Consultants, Inc. (US)
- OSTI ID:
- 20006475
- Report Number(s):
- CONF-990608-; TRN: IM200008%%82
- Resource Relation:
- Conference: Air and Waste 92nd Annual Meeting and Exhibition, St. Louis, MO (US), 06/20/1999--06/24/1999; Other Information: 1 CD-ROM. Operating Systems: Windows 3.1, '95, '98 and NT; Macintosh; and UNIX; PBD: 1999; Related Information: In: Air and Waste 92nd annual meeting and exhibition proceedings, [9500] pages.
- Country of Publication:
- United States
- Language:
- English
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