Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
March 1997
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Stripping Volatile Organic Compounds and Petroleum Hydrocarbons
From Water by Tray Aeration
6. AUTHORS
David F. LaBranche and M. Robin Collins
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
Civil Engineering Department
University of New Hampshire
Special Report 97-6
Durham, NH 03824-3591
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
USACRREL
North East Environmental Products, Inc.
AGENCY REPORT NUMBER
Hanover, NH 03755-1290
West Lebanon, NH 03784
Environmental Research Group
University of New Hampshire
Durham, NH 03824
11. SUPPLEMENTARY NOTES
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
13. ABSTRACT (Maximum 200 words)
Volatile organic compounds (VOCs) and petroleum products are ubiquitous groundwater contaminants.
Petroleum products, e.g., diesel fuel, contain a wide array of volatile, semivolatile, and long-chain hydrocarbon
compounds. This research sought to determine whether air stripping can provide a site-specific treatment
solution for petroleum-contaminated groundwaters and to document the abilities and limitations of tray-type
(ShallowTray) air stripping technology. Full factorial experimental trials were conducted to determine the
influence of inlet water flow rate and temperature on trichloroethylene (TCE), perchloroethylene (PCE) and
total petroleum hydrocarbon (TPH) removal. As expected, TPH removal controlled air stripper performance,
and liquid temperature affected removal more than flow rate. The mass transfer rate of TCE and PCE from
water to air was controlled by the compound's volatility, while the TPH mass transfer rate was controlled by
the compound's concentration gradient. Results indicate that economical air stripping of VOC and TPH
compounds can be achieved using low liquid flow rates (2075 L/min) and medium liquid temperatures (16
28C) in tray-type air strippers.
14. SUBJECT TERMS
15. NUMBER OF PAGES
24
Air stripping
Diesel fuel
Modeling
Remediation
16. PRICE CODE
Groundwater
Petroleum
Tray-type air strippers
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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