title: Biodegradation of pentachlorophenol in a continuous anaerobic reactor augmented with Desulfitobacterium frappieri PCP-1.
abstract: In this work, a strain of anaerobic pentachlorophenol (PCP) degrader, Desulfitobacterium frappieri PCP-1, was used to augment a mixed bacterial community of an anaerobic upflow sludge bed reactor degrading PCP. To estimate the efficiency of augmentation, the population of PCP-1 in the reactor was enumerated by a competitive PCR technique. The PCP-1 strain appeared to compete well with other microorganisms of the mixed bacterial community, with its population increasing from 10(6) to 10(10) cells/g of volatile suspended solids within a period of 70 days. Proliferation of strain PCP-1 allowed for a substantial increase of the volumetric PCP load from 5 to 80 mg/liter of reaction volume/day. A PCP removal efficiency of 99% and a dechlorination efficiency of not less than 90.5% were observed throughout the experiment, with 3-Cl-phenol and phenol being observable dechlorination intermediates.
authors.affiliation: Biotechnology Research Institute, NRC, Montreal, Quebec, Canada H4P 2A2.
authors.forename: B
authors.initials: B
authors.lastname: Tartakovsky
authors.forename: M
authors.initials: M
authors.lastname: Levesque
authors.forename: R
authors.initials: R
authors.lastname: Dumortier
authors.forename: R
authors.initials: R
authors.lastname: Beaudet
authors.forename: S R
authors.initials: SR
authors.lastname: Guiot
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002733:Chlorophenols / Q000378:metabolism; D006094:Gram-Positive Bacteria / Q000378:metabolism*; D010416:Pentachlorophenol / Q000378:metabolism*
chemical_list: D002733:Chlorophenols; D010416:Pentachlorophenol; C030682:3-chlorophenol