Bioremediation of contaminated groundwater
Disclosed is an apparatus and method for in situ remediation of contaminated subsurface soil or groundwater contaminated by chlorinated hydrocarbons. A nutrient fluid (NF) is selected to simulated the growth and reproduction of indigenous subsurface microorganisms capable of degrading the contaminants; an oxygenated fluid (OF) is selected to create an aerobic environment with anaerobic pockets. NF is injected periodically while OF is injected continuously and both are extracted so that both are drawn across the plume. NF stimulates microbial colony growth; withholding it periodically forces the larger, healthy colony of microbes to degrade the contaminants. Treatment is continued until the subsurface concentration of contaminants is acceptable. NF can be methane and OF be air, for stimulating production of methanotrophs to break down chlorohydrocarbons, especially TCE and tetrachloroethylene.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- SRS; SCA: 540220; 540250; PA: EDB-96:061304; NTS-96:012846; SN: 96001550310
- Patent Number(s):
- PATENTS-US-A8207506
- Application Number:
- ON: DE96006516; PAN: 8-207,506
- OSTI ID:
- 205137
- Resource Relation:
- Other Information: PBD: 1994
- Country of Publication:
- United States
- Language:
- English
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