Record Display for the EPA National Library Catalog


Main Title Recovery of oil spills using vortex assisted airlift system /
Author Walkup, P. C., ; Walku, P. C. ; Smit, J. D. ; Simonso, E. R.
Other Authors
Author Title of a Work
Smith, J. D.,
Simonson, E. R.,
Smith, John Dexter,
Walkup, P. C.
CORP Author Pacific Northwest Laboratory.
Publisher United States Environmental Protection Agency, Water Quality Office,
Year Published 1970
Report Number EPA/810-R-70-025; 15080DJM07/70; EPA-14-12-513; EPA-WQO-15080-DJM; 13896
Stock Number PB-203 489
OCLC Number 00207736
Subjects Oil spills
Additional Subjects ( Water pollution ; Oils) ; ( Materials recovery ; Oils) ; ( Separators ; Water pollution) ; Vortices ; Vacuum apparatus ; Feasibility ; Design criteria ; Ocean waves ; Pumping ; Coanda effect ; Performance evaluation ; Field tests ; Emulsions ; Oil pollution ; Oil pollution recovery ; Oil slicks
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 810-R-70-025 Headquarters Library/Washington,DC 06/06/2014
ELBD ARCHIVE EPA 810-R-70-025 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
NTIS  PB-203 489 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18, [21] pages : illustrations, figures, tables ; 28 cm
Studies were conducted to determine the feasibility of a concept for recovery of floating oil slicks which utilizes a pump induced vortex and a vacuum suction or Coanda nozzle. The apparatus used for developmental experimentation comprised a pumping system for vortex production, a large water basin, a flapper type wave generator, and several configurations of the experimental assembly. The range of influence was smaller than was anticipated. Approximately a 25-foot influence diameter was achieved for the maximum strength vortex generated in this apparatus. Extrapolation of measured performance data showed that a 1/8-inch thick slick could be recovered at the rate of 960 gallons per hour. Experiments with and without a variety of oils showed that enhanced oil recovery rates with the vortex was due entirely to the surface current generated by the vortex. This effect was found to improve oil recovery by a factor of 7.9 above the rates achieved with a suction nozzle alone. The surface position of the vortex cavity was found to be sensitive to surface waves. The cavity moved in a circular path within three vortex cavity radii of the still water cavity location as a wave passed through the assembly. Tests with a Coanda nozzle (a fluid attachment eductor) showed improved performance in surface waves. However, the recovered oil-water mixture was highly emulsified. (Author)
U.S. Environmental Protection Agency Contract No. Contract Number: 14-12-513. "July 1970." Includes bibliographical references (pages 17-18).