A study of augmented bioremediation for gasoline-contaminated soil
Conference
·
OSTI ID:377192
- Univ. of Arkansas, Fayetteville, AR (United States)
- Pollution Management, Inc., Little Rock, AR (United States)
A field-scale study was performed to evaluate the efficacy of augmenting bioremediation of gasoline-contaminated soil using commercially available products. A portion of the contaminated backfill from recently removed underground storage tanks (UST`s) at a bulk fuel facility in Northeast Arkansas was used in this bioremediation study. Seven polyethylene lined bermed areas (cells), were filled with 3.8 cubic meters (5 cubic yards) of contaminated soil. The USTs had leaked gasoline, diesel and kerosene into the surrounding soil. Four bioaugmentation product vendors participated; each one demonstrated their product in a separate cell. An additional cell was subjected to soil vapor extraction, and the remaining two were used as experimental controls. One control cell remained covered with polyethylene sheeting for the duration of the study period. The other control cell was subjected to mechanical processes similar to the bloaugmented cells. That is, if a vendor rototilled his cell, the control cell was rototilled with a clean rototiller, however, no soil amendments or microorganisms were added. Samples were collected from each comer and the center of each cell over a 39 week period. A composite sample for each cell was placed in a glass sample, container with a lid, packed on ice and delivered to an analytical laboratory for total petroleum hydrocarbon (TPH) analysis. After 39 weeks, the covered control showed little or no decrease in TPH concentration. The remaining cells all had varying degrees of TPH loss. However, the bioaugmentation products did not significantly outperform the tilled control. Both the fertilized control and the oil vapor extraction treatments proved to be nearly as effective as the best of the products and significantly better than two of the products in terms of final TPH and the first order removal rate constant.
- Research Organization:
- USDOE, Washington, DC (United States); Amoco Production Co., Houston, TX (United States); Conoco, Inc., Stamford, CT (United States)
- OSTI ID:
- 377192
- Report Number(s):
- CONF-9509296--; ON: DE96001221
- Country of Publication:
- United States
- Language:
- English
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