Microbial dehalogenation using methanosarcina
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United States of America Patent
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Aug 30, 1994
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N/A
app pub date -
Sep 4, 1992
filing date -
Aug 4, 1992
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Abstract
A method for bioremediation of hazardous wastes is disclosed. The method can be used for anaerobic treatment of a liquid or slurry hazardous waste stream (e.g., industrial wastewater or sludge) or for treatment of contaminated groundwater. Removal of halogenated (e.g., chlorinated) hydrocarbons, such as tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane and similar xenobiotics is possible. The method involves biotransformation of (dehalogenation) halogenated hydrocarbons by means of natural methanogenic bacteria, Methanosarcina barkeri strain 227 and/or Methanosarcina vacuolata. These methanogens can accomplish cometabolism of chlorinated hydrocarbons during metabolism of a primary substrate such as hydrogen-carbon dioxide, methanol, methylamine, dimethylamine, trimethylamine and acetate. Reductive dechlorination, energy conservation and control of air pollution are accomplished.
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