skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Apparatus and method for phosphate-accelerated bioremediation

Abstract

An apparatus and method are provided for supplying a vapor-phase nutrient to contaminated soil for in situ bioremediation. The apparatus includes a housing adapted for containing a quantity of the liquid nutrient, a conduit in communication with the interior of the housing, means for causing a gas to flow through the conduit, and means for contacting the gas with the liquid so that a portion evaporates and mixes with the gas. The mixture of gas and nutrient vapor is delivered to the contaminated site via a system of injection and extraction wells configured to the site and provides for the use of a passive delivery system. The mixture has a partial pressure of vaporized nutrient that is no greater than the vapor pressure of the liquid. If desired, the nutrient and/or the gas may be heated to increase the vapor pressure and the nutrient concentration of the mixture. Preferably, the nutrient is a volatile, substantially nontoxic and nonflammable organic phosphate that is a liquid at environmental temperatures, such as triethyl phosphate or tributyl phosphate. 8 figs.

Inventors:
; ; ; ; ;
Issue Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
644365
Patent Number(s):
5753109
Application Number:
PAN: 8-579,910
Assignee:
Dept. of Energy, Washington, DC (United States)
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 19 May 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; IN-SITU PROCESSING; BIODEGRADATION; REMEDIAL ACTION; SOILS; PHOSPHATES

Citation Formats

Looney, B B, Pfiffner, S M, Phelps, T J, Lombard, K H, Hazen, T C, and Borthen, J W. Apparatus and method for phosphate-accelerated bioremediation. United States: N. p., 1998. Web.
Looney, B B, Pfiffner, S M, Phelps, T J, Lombard, K H, Hazen, T C, & Borthen, J W. Apparatus and method for phosphate-accelerated bioremediation. United States.
Looney, B B, Pfiffner, S M, Phelps, T J, Lombard, K H, Hazen, T C, and Borthen, J W. Tue . "Apparatus and method for phosphate-accelerated bioremediation". United States.
@article{osti_644365,
title = {Apparatus and method for phosphate-accelerated bioremediation},
author = {Looney, B B and Pfiffner, S M and Phelps, T J and Lombard, K H and Hazen, T C and Borthen, J W},
abstractNote = {An apparatus and method are provided for supplying a vapor-phase nutrient to contaminated soil for in situ bioremediation. The apparatus includes a housing adapted for containing a quantity of the liquid nutrient, a conduit in communication with the interior of the housing, means for causing a gas to flow through the conduit, and means for contacting the gas with the liquid so that a portion evaporates and mixes with the gas. The mixture of gas and nutrient vapor is delivered to the contaminated site via a system of injection and extraction wells configured to the site and provides for the use of a passive delivery system. The mixture has a partial pressure of vaporized nutrient that is no greater than the vapor pressure of the liquid. If desired, the nutrient and/or the gas may be heated to increase the vapor pressure and the nutrient concentration of the mixture. Preferably, the nutrient is a volatile, substantially nontoxic and nonflammable organic phosphate that is a liquid at environmental temperatures, such as triethyl phosphate or tributyl phosphate. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {5}
}