title: Degradation of chlorophenols by a defined mixed microbial community.
abstract: Synthetic sewage containing phenol, acetone, and alkanols plus 4-chlorophenol or a mixture of isomeric chlorophenols is completely degraded by a defined mixed culture with Pseudomonas sp. strain B13 as a chlorocatechol-dissimilating member of the community. Total degradation of the organic carbon was indicated by release of stoichiometric amounts of chloride and low content of dissolved organic carbon in the cell-free effluents. During adaptation to high loads of chlorophenols the initial meta-cleavage activity was completely replaced by ortho-cleavage activity of type I and II. In the fully acclimated culture, hybrid strains such as Alcaligenes sp. strain A7-2 were detected, which are more competitive than Pseudomonas sp. strain B13 with respect to chlorophenol degradation.
mesh_terms: D000421:Alcaligenes / Q000378:metabolism*; D001673:Biodegradation, Environmental; D050548:Catechol 1,2-Dioxygenase; D050557:Catechol 2,3-Dioxygenase; D002723:Chlorobenzoates / Q000378:metabolism; D002733:Chlorophenols / Q000378:metabolism*; D049308:Dioxygenases; D006899:Mixed Function Oxygenases / Q000378:metabolism; D009525:Niacin / Q000378:metabolism; D010105:Oxygenases / Q000378:metabolism; D011549:Pseudomonas / Q000378:metabolism*; D012722:Sewage
chemical_list: D002723:Chlorobenzoates; D002733:Chlorophenols; D012722:Sewage; D009525:Niacin; D006899:Mixed Function Oxygenases; D010105:Oxygenases; D049308:Dioxygenases; D050548:Catechol 1,2-Dioxygenase; D050557:Catechol 2,3-Dioxygenase; C022336:phenol 2-monooxygenase