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Biodegradation of Biphenyl by Sphingbium yanoikuyae BK-10  

Lee Jung-Bok (The School of Bioresource Science, Andong National University)
Kim Dong-Geol (The School of Bioresource Science, Andong National University)
Choi Chung-Sig (HansBio Co.)
Sohn Ho-Yong (Dept. of Food and Nutrition, Andong National University)
Kim Jang-Eok (Dept. Argicultural Chemistry, Kyungpook National University)
Kwon Gi-Seok (The School of Bioresource Science, Andong National University)
Publication Information
Microbiology and Biotechnology Letters / v.34, no.2, 2006 , pp. 174-179 More about this Journal
Abstract
Bacterium capable of using biphenyl as a sole source of carbon and energy were isolated from soil, and based on the results of 16S rDNA sequence, strain BK10 identified as a Sphingobium yanoiktiyae. The optimum cultural conditions were as follows; $NH_4NO_3$ 1g, $K_2HPO_4$ 1g, $MgSO_4{\cdot}7H_2O$ 0.5g, $CaCO_3$ 0.2 g per 1 liter of distilled water. The Sphingobium yanoikuyae BK10 strain was completely utilized biphenyl in mineral salt media containing biphenyl at concentration 500 $\mu$g/ml of biphenyl as a sole carbon and energy source within 48 hours. Optimumal pH and temperature for biphenyl degradation and cell growth of strains were 6.0$\sim$8.0 and 20$\sim$50$^{\circ}C$, respectively. Especially, at 30$^{\circ}C$, cell-growth were higher than other temperature. Cell grown on biphenyl has been shown to have a higher removal rate for biphenyl than grown on sucrose. This study shows that Sphingobium yanoikuyae BK10 strain had a high biodegradation capability of biphenyl and can be simulate a candidate compounds the bioremediation of PCBs (Polychlorinated biphenyl) contaminant soil and water.
Keywords
Biphenyl; Sphingobium yanoikuyae BK10; PCBs (Polychlorinated Biphenyls); biodegradation;
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