Combined air stripper/membrane vapor separation systems. Final report
Air stripping is an economical and efficient method of removing dissolved volatile organic compounds (VOCs) from contaminated groundwater. Air strippers, however, produce a vent air stream, which must meet the local air quality limits. If the VOC content exceeds the limits, direct discharge is not possible; therefore, a carbon adsorption VOC capture system is used to treat the vent air. This treatment step adds a cost of at least $50/lb of VOC captured. In this program, a combined air stripper/membrane vapor separation system was constructed and demonstrated in the laboratory. The membrane system captures VOCs from the stripper vent stream at a projected cost of $15/lb VOC for a water VOC content of 5 ppmw, and $75/lb VOC for a water VOC content of 1 ppmw. The VOCs are recovered as a small, concentrated liquid fraction for disposal or solvent recycling. The concept has been demonstrated in experiments with a system capable of handling up to 150,000 gpd of water. The existing demonstration system is available for field tests at a DOE facility or remediation site. Replacement of the current short air stripping tower (effective height 3 m) with a taller tower is recommended to improve VOC removal.
- Research Organization:
- Membrane Technology and Research, Inc., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10134632
- Report Number(s):
- DOE/CH--9209; ON: DE93009354
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
540220
540250
AIR
CHEMICALS MONITORING AND TRANSPORT
DECONTAMINATION
EXPERIMENTAL DATA
GROUND WATER
HEALTH AND SAFETY
MEMBRANES
NUCLEAR FACILITIES
ORGANIC COMPOUNDS
PROGRESS REPORT
REMEDIAL ACTION
REMOVAL
SEPARATION PROCESSES
SITE RESOURCE AND USE STUDIES
STRIPPING
US DOE