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Title: Method for phosphate-accelerated bioremediation

Abstract

An apparatus and method 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 fluid 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 thereof 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. 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.

Inventors:
 [1];  [2];  [2];  [3];  [3];  [4]
  1. Aiken, SC
  2. Augusta, GA
  3. Knoxville, TN
  4. Seattle, WA
Issue Date:
Research Org.:
WESTINGHOUSE SAVANNAH RIVER CO
OSTI Identifier:
870230
Patent Number(s):
5480549
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; phosphate-accelerated; bioremediation; apparatus; supplying; vapor-phase; nutrient; contaminated; soil; situ; housing; adapted; containing; quantity; liquid; conduit; fluid; communication; interior; means; causing; gas; flow; contacting; portion; evaporates; mixes; mixture; vapor; delivered; site; via; injection; extraction; configured; partial; pressure; vaporized; desired; heated; increase; concentration; preferably; volatile; substantially; nontoxic; nonflammable; organic; phosphate; environmental; temperatures; triethyl; tributyl; housing adapted; contaminated soil; tributyl phosphate; vapor pressure; fluid communication; partial pressure; organic phosphate; situ bioremediation; contaminated site; vapor-phase nutrient; environmental temperature; phosphate-accelerated bioremediation; liquid nutrient; /210/166/405/

Citation Formats

Looney, Brian B, Lombard, Kenneth H, Hazen, Terry C, Pfiffner, Susan M, Phelps, Tommy J, and Borthen, James W. Method for phosphate-accelerated bioremediation. United States: N. p., 1996. Web.
Looney, Brian B, Lombard, Kenneth H, Hazen, Terry C, Pfiffner, Susan M, Phelps, Tommy J, & Borthen, James W. Method for phosphate-accelerated bioremediation. United States.
Looney, Brian B, Lombard, Kenneth H, Hazen, Terry C, Pfiffner, Susan M, Phelps, Tommy J, and Borthen, James W. Mon . "Method for phosphate-accelerated bioremediation". United States. https://www.osti.gov/servlets/purl/870230.
@article{osti_870230,
title = {Method for phosphate-accelerated bioremediation},
author = {Looney, Brian B and Lombard, Kenneth H and Hazen, Terry C and Pfiffner, Susan M and Phelps, Tommy J and Borthen, James W},
abstractNote = {An apparatus and method 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 fluid 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 thereof 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. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

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