Degradation of 2,4-dichlorophenol by Bacillus sp. isolated from an aeration pond in the Baikalsk pulp and paper mill (Russia) |
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Authors: | Galina Matafonova Galina Shirapova Christian Zimmer Friedrich Giffhorn Valeriy Batoev Gert-Wieland Kohring |
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Affiliation: | aBaikal Institute of Nature Management SB RAS, Sakhyanova 6, Ulan-Ude, 670047, Russia;bInstitute for Applied Microbiology, Saarland University, PO Box 151150, 66041 Saarbrücken, Germany |
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Abstract: | A pure culture of 2,4-dichlorophenol (2,4-DCP)-degrading bacteria was isolated from a natural enrichment that had been adapted to chlorophenols in the aeration pond of the Baikalsk pulp and paper mill (Russia). The bacteria were identified by 16S rDNA intergenic region analysis, using PCR with universal primers. Comparative analysis of the 16S rDNA sequence (1545 bp) in the GenBank database revealed that these bacteria are related to Bacillus cereus GN1. Degradation of 2,4-DCP was studied using this culture in liquid medium under aerobic conditions, at initial concentrations of 20–560 μM 2,4-DCP. The 2,4-DCP degradation rates by B. cereus GN1 could be determined at concentrations up to 400 μM. However, higher concentrations of 2,4-DCP (560 μM) were inhibitory to cell growth. |
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Keywords: | Baikalsk pulp and paper mill 2,4-dichlorophenol Degradation Bacillus |
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