Title:
IN SITU BIODEGRADATION OF SUBSURFACE CONTAMINANTS BY INJECTION OF PHOSPHATE NUTRIENTS AND HYDROGEN
Document Type and Number:
WIPO Patent Application WO2003083260
Kind Code:
A9
Abstract:
The present invention provides a method and gaseous composition for the in situ bioremediation of soil and groundwater contaminated with organic compounds, including halogenated hydrocarbons. The gaseous composition, which readily permeates a subsurface region, comprises hydrogen (H2(H2)and one or more vo latile phosphates, such as triethylphosphate (TEP) and tributylphosphate (TBP). The volatile phosphates serve as nutrients that stimulate the growth and activity of indigenous microbes that are capable of degrading the contaminants. The addition of hydrogen facilitates the direct reductive dehalogenation of highly halogenated contaminants. The gaseous composition may optionally contain one or more of a volatile alkane and nitrous oxide as additional supports for microbial growth, and carbon dioxide to lower the pH of remediation sites that are highly alkaline.
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Inventors:
PRIESTER LAMAR E III (US)
HARMISON BRIAN (US)
HUFF JOHN (US)
HARMISON BRIAN (US)
HUFF JOHN (US)
Application Number:
PCT/US2003/007798
Publication Date:
June 03, 2004
Filing Date:
March 25, 2003
Export Citation:
Assignee:
PRIESTER LAMAR E III (US)
HARMISON BRIAN (US)
HUFF JOHN (US)
HARMISON BRIAN (US)
HUFF JOHN (US)
International Classes:
B09C1/10; C12S9/00; (IPC1-7): E21B43/22; A62D3/00; B09B1/00; B09B3/00
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