Liquid purification or separation – Processes – Treatment by living organism
Patent
1997-05-27
1999-10-19
Wyse, Thomas G.
Liquid purification or separation
Processes
Treatment by living organism
210631, 210909, 4352625, 588207, 134 42, C02F 334, B09B 300
Patent
active
059683600
ABSTRACT:
Methods and compositions are disclosed for the microbial degradation of polychlorinated biphenyl compounds (PCBs) at a concentration of 100-200 mg/kg soil in contaminated environments, using natural, non-toxic, environmentally-acceptable compounds for application to such environments, such that PCB-contaminated environments are bioremediated by inducing a metabolic pathway in PCB-degrading microbes. Inoculated or indigenous PCB-degrading microbes, such as Arthrobacter strain B1B are induced to decontaminate the PCBs. Also disclosed are a plant and chemical screening assays for identifying plants that produce metabolites which promote PCB cometabolism. Further disclosed is a method for bioremediating PCB-contaminated environments in a commercially practical manner using l-carvone, a nontoxic and inexpensive chemical component of spearmint, for the in situ cleanup of PCB-contaminated soils, to induce Arthrobacter strain B1B to cometabolize and to substantially degrade PCBs.
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Crowley David E.
Focht Dennis D.
Gilbert Eric S.
Hernandez Blanca S.
The Regents of the University of California
Wyse Thomas G.
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