Effects of flowrate and temperature during bioventing in cold climates
- Komex International Ltd., Calgary, Alberta (Canada)
- Univ. of Waterloo, Ontario (Canada). Waterloo Centre for Groundwater Research
A bioventing project was performed at a natural gas processing plant site in west central Alberta, where a light, nonaqueous-phase liquid (LNAPL) plume of natural gas condensate covers an area of approximately 65,000 m{sup 2}. Bioventing was tested in two phases using an existing soil vapor extraction (SVE) installation. The first phase was a flowrate variation test, during August 1993 to November 1993. The blower extraction rate was varied to determine the optimum air extraction rate at which biodegradation was maintained and volatilization was minimized, in order to reduce potential off-gas treatment costs. At the lowest extraction rate of 24 L/s the hydrocarbon mass removed due to biodegradation was 50 kg/day, with only 4 kg/day of extracted off-gas. The second phase of the test consisted of respiration testing from December 1993 to May 1994 to monitor biodegradation rates during winter. It is widely believed that biodegradation rates drop at low temperatures. However, the biodegradation rate was relatively high during the winter, averaging 20 mg of hydrocarbon/kg of soil per day, at in situ temperatures of 5 to 8 C.
- OSTI ID:
- 467748
- Report Number(s):
- CONF-950483-; ISBN 1-57477-003-9; TRN: 97:008332
- Resource Relation:
- Conference: 3. international in situ and on-site bioreclamation symposium, San Diego, CA (United States), 24-27 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of In situ aeration: Air sparging, bioventing, and related remediation process; Hinchee, R.E. [ed.] [Battelle Memorial Inst., Columbus, OH (United States)]; Miller, R.N. [ed.] [Air Force Center for Environmental Excellence, Brooks AFB, TX (United States)]; Johnson, P.C. [ed.] [Arizona State Univ., Tempe, AZ (United States)]; PB: 630 p.; Bioremediation, Volume 3(2)
- Country of Publication:
- United States
- Language:
- English
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