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Biological degradation of PCBs in the environment occurs by anaerobic dechlorination of highly chlorinated congeners followed by the aerobic degradation of the dechlorination products.  However, a key bottleneck is the low native abundance of PCB degrading bacteria found naturally in sediments. Treatment with bioamended AC enhances the natural degradation of PCBs by increasing the numbers of PCB anaerobic dechlorinating and aerobic degrading bacteria in the contaminated sediment.  The microbes are grown in high volume bioreactors, concentrated by centrifugation or filtration and shipped to the field for deployment.  The bioamendments occur naturally in the environment and are non-GMO and non-pathogenic. (U.S. Patent No. 6,946,248, 7,462,480 B2)

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