Isolation and Characterization of a Lipid-Degrading Bacterium and Its Application to Lipid-Containing Wastewater Treatment(ENVIRONMENTAL BIOTECHNOLOGY)

概要

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To construct an efficient lipid-containing wastewater treatment system, microorganisms that degrade lipids efficiently were isolated from various environmental sources. Strain DW2-1 showed the highest rate of degradation of 1%(w/v) salad oil among the isolated strains. Strain DW2-1 was identified as Burkholderia sp. and designated Burkholderia sp. DW2-1. The rate of degradation of salad oil, olive oil, sesame oil, and beef tallow by strain DW2-1 were 96.7%, 92.3%, 90.1% and 77.4%, respectively, during a 48-h cultivation. Strain DW2-1 grew well in a synthetic wastewater medium(>lx10^<10> colony forming unit [CFU]/ml) between 20℃ and 38℃, and its rate of degradation of salad oil was above 90% after a 48-h cultivation. The lipase and biosurfactant(BSF) activities of strain DW2-1 after a 48-h cultivation were 1720 U/l and 480 U/ml, respectively. In continuous cultures for lipid-containing wastewater treatment, DW2-1 was stably maintained and degraded more than 90% of salad oil during a 7-d cultivation.
2007-04-25