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Total biodegradation of 4-chlorobiphenyl (4 CB) by a two-membered bacterial culture


Several bacterial strains that can oxidize mono- and dichlorinated biphenyls with one unsubstituted ring have already been described. The major route for this biodegradation leads ultimately to the corresponding chlorobenzoic acid, but several other minor chlorinated metabolites that might possibly be of concern for the environment have also been described previously. Since none of the bacterial strains that are able to oxidize these chlorinated biphenyls in pure culture are known to degrade chlorobenzoic acid, the oxidation of these substrates by axenic cultures always generates chlorobenzoates plus several other metabolites. In the present study, we have estimated the biodegradation of 4-chlorobiphenyl (4CB) by a two-membered bacterial culture containing one strain able to grow on 4CB and to transform it into 4-chlorobenzoate (4CBA) and one strain able to degrade 4CBA. The results were encouraging, since it was shown that the degradation of 4CB was more rapid and complete with the double bacterial culture.

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Correspondence to Michel Sylvestre.

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Sylvestre, M., Massé, R., Ayotte, C. et al. Total biodegradation of 4-chlorobiphenyl (4 CB) by a two-membered bacterial culture. Appl Microbiol Biotechnol 21, 192–195 (1985).

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  • Oxidation
  • Chlorinate
  • Biodegradation
  • Bacterial Strain
  • Biphenyl