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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/793

Title: Characterization of bacteria isolated from a bleached Kraft pulp mill wastewater treatment system
Authors: Fulthorpe, Roberta
Liss, Steven
Allen, Grant
Keywords: pulp and paper, wastewater treatment, chlorinated organics, culturable heterotrophs, methylotrophs, plasmids.
Issue Date: 1992
Publisher: National Research Council Canada
Citation: Can. J. Microbiol. 39: 13-24.
Abstract: Water samples from the wastewater treatment system of a bleach kraft mill and from the river that supplies the mill were plated on six different media and culturable isolates were screened for substrate utilization patterns, taxonomic characters, plasmid content, and resistance to ampicillin, streptomycin, kanamycin, tetracycline, naldixic acid, mercury, nickel, copper, cobalt, cadmium, and zinc. A cluster analysis of the substrate utilization profiles and taxonomic characters revealed that Pseudomonas, Acinetobacter, and Acidovorax spp. were common among the culturable isolates from the river, while Ancylobacter aquaticus, Klebsiella spp., and an unknown group of pleomorphic Gram-negative methylotrophs were common among the culturable isolates from the mill treatment system. Of isolates from the settling pond and aerated lagoon, 78 and 64% carried plasmids, while only 56% of isolates from the river carried plasmids. Plasmids were significantly associated with resistance to cadmium but not with any other resistance characters. Large numbers of plasmid-carrying A. aquaticus strains and pleomorphic methylotrophs accounted for high plasmid incidence levels in the mill treatment system, and the ability to dechlorinate simple aliphatic substrates was found in these two groups as well as in one Pseudomonas strain.
URI: http://hdl.handle.net/1807/793
Appears in Collections:Biology

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