Global to push GA events into
skip to main content

Title: Bioremediation of contaminated groundwater

An apparatus and method for in situ remediation of contaminated subsurface soil or groundwater contaminated by chlorinated hydrocarbons. A nutrient fluid is selected to stimulate the growth and reproduction of indigenous subsurface microorganisms that are capable of degrading the contaminants; an oxygenated fluid is selected to create a generally aerobic environment for these microorganisms to degrade the contaminants, leaving only pockets that are anaerobic. The nutrient fluid is injected periodically while the oxygenated fluid is injected continuously and both are extracted so that both are drawn across the plume. The nutrient fluid stimulates microbial colony growth; withholding it periodicially forces the larger, healthy colony of microbes to degrade the contaminants. Treatment is continued until the subsurface concentration of contaminants is reduced to an acceptable, preselected level. The nutrient fluid can be methane and the oxygenated fluid air for stimulating production of methanotrophs to break down chlorohydrocarbons, especially trichloroethylene (TCE) and tetrachloroethylene.
Inventors:
 [1];  [1]
  1. (Augusta, GA)
Issue Date:
OSTI Identifier:
869718
Assignee:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5384048
Contract Number:
AC09-89SR18035
Research Org:
WESTINGHOUSE SAVANNAH RIVER CO
Country of Publication:
United States
Language:
English
Subject:
bioremediation; contaminated; groundwater; apparatus; method; situ; remediation; subsurface; soil; chlorinated; hydrocarbons; nutrient; fluid; selected; stimulate; growth; reproduction; indigenous; microorganisms; capable; degrading; contaminants; oxygenated; create; aerobic; environment; degrade; leaving; pockets; anaerobic; injected; periodically; continuously; extracted; drawn; plume; stimulates; microbial; colony; withholding; periodicially; forces; larger; healthy; microbes; treatment; continued; concentration; reduced; acceptable; preselected; level; methane; air; stimulating; production; methanotrophs; break; chlorohydrocarbons; especially; trichloroethylene; tce; tetrachloroethylene; chlorinated hydrocarbons; contaminated groundwater; selected level; subsurface soil; water contaminated; preselected level; chlorinated hydrocarbon; contaminated subsurface; situ remediation; /210/405/435/588/

Similar records in DOepatents and OSTI.GOV collections: