Main Title |
Packed-Tower Aeration Study to Remove Volatile Organics from Groundwater at Wurtsmith Air Force Base, Michigan. |
Author |
Stallings, R. L. ;
Rogers, T. N. ;
|
CORP Author |
Research Triangle Inst., Research Triangle Park, NC.;Air Force Engineering and Services Center, Tyndall AFB, FL. Engineering and Services Lab. |
Year Published |
1985 |
Report Number |
EPA-68-03-3149; 2103; 70; AFESC/ESL-TR-84-60; |
Stock Number |
AD-A157 679/2 |
Additional Subjects |
Water treatment ;
Ground water ;
Packing materials ;
Air force facilities ;
Costs ;
Economic analysis ;
Trade off analysis ;
Gas chromatography ;
Mass spectroscopy ;
Coefficients ;
Mass transfer ;
Benzene ;
Cyclohexanes ;
Field tests ;
Fuels ;
Storage ;
Aeration ;
Pressure ;
Reduction ;
Efficiency ;
Removal ;
Rings ;
Trichloroethylene ;
Air water interactions ;
Ratios ;
Volume ;
Xylenes ;
Efficiency ;
Removal ;
Operation ;
Volatility ;
Water ;
Water pollution detection ;
Water pollution control ;
Air pollution
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
AD-A157 679/2 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
215p |
Abstract |
The packing materials investigated were 1-inch Pall rings, Number 1 Jaeger Tri-Packs, 1-inch Flexi-saddles, and Flexipak Type II structured packing. Analysis of the groundwater in the fuel storage area by the headspace technique using gas chromatography/mass spectroscopy (GC/MS) identified 16 volatile organics. The six major VOC contaminants identified were: n-pentane, cyclohexane, trichloroethylene, benzene, ethylbenzene, and xylene. Field trials in a pilot-scale air stripper (1.5 feet diameter by 10 feet, with an 8-foot packed section) yielded removal efficiencies above 90 percent for all VOCs except isobutane, under a water loading rate of 2.13 cu. ft./min.sq.ft. (0.649 cu. f./min./sq. m.), and a volumetric air-to-water ratio (G/L) of approximately 65). Based on measured overall mass transfer coefficients (KLa), a packed-tower height of 25 to 30 feet should be effective in achieving a 95 percent removal efficiency. Of the four packing materials tested, the 1-inch Pall rings consistently exhibited the highest mass transfer coefficients for all the VOCs over the broadest range of air- and water-loading conditions. In some cases, the other packings had mass transfer coefficients comparable to the Pall rings for some but not all the VOCs or only for a more narrow range of tower operation conditions. However, since the Pall rings had the highest operating pressure drop, economic trade-off analyses of system capital and operating costs should be performed in making a packing selection for a full-scale treatment system. |
NTIS Title Notes |
Final rept. 1 May-1 Oct 84. |
PUB Date Free Form |
Jun 85 |
Category Codes |
1E; 7D; 68D; 51; 99A; 68A |
NTIS Prices |
PC A10/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
529800135 |
Origin |
NTIS |
Type |
CAT |