In situ bioremediation of a pipeline spill using nitrate as the electron acceptor
Conference
·
OSTI ID:490925
- Environmental Protection Agency, Ada, OK (United States). R.S. Kerr Environmental Research Lab.
The Robert S. Kerr Environmental Research Lab (RSKERL) is monitoring the progress of nitrate-based bioremediation at Park City, Kansas, where recharge water is being applied to a heterogeneous petroleum-contaminated aquifer through numerous injection wells. The remediation system provides recharge amended with nitrate and nutrients to two cells and nutrients without nitrate to one cell. One recovery well recirculates groundwater and another provides hydraulic control. Treatability studies demonstrated that the requisite microbial activity is distributed throughout the site. A total of 15 m of recharge containing 700 kg NO{sub 3}-N was applied by two combined cells. Denitrification was evidenced by transient production of both nitrite and nitrous oxide during operation. However, petroleum hydrocarbons are still being leached from the contaminated intervals. Core analyses reveal that certain zones are being remediated, whereas other are not. Although site heterogeneity precludes an accurate assessment of the extent of remediation at this time, analyses of ratios of various components indicate that bioremediation is occurring.
- Sponsoring Organization:
- Environmental Protection Agency, Washington, DC (United States)
- OSTI ID:
- 490925
- Report Number(s):
- CONF-950483--; ISBN 1-57477-007-1
- Country of Publication:
- United States
- Language:
- English
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