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Characterization of the bacterial community in a biocover for the removal of methane, benzene and toluene

Title
Characterization of the bacterial community in a biocover for the removal of methane, benzene and toluene
Authors
Ryu H.W.Cho K.-S.
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2012
Journal Title
Korean Journal of Microbiology and Biotechnology
ISSN
1598-642XJCR Link
Citation
vol. 40, no. 1, pp. 76 - 81
Indexed
SCOPUS; KCI scopus
Abstract
Removal of methane, benzene and toluene was evaluated in a lab-scale biocover packed with a soil mixture of forest soil and earthworm cast (75:25 weight ratio). The bacterial community in the biocover was characterized using quantitative real-time PCR and terminal restriction fragment length polymorphism. Methane was removed at the upper layer of the biocover (-0.1 ∼ -0.4 m), where the oxygen concentration was remarkably lower. The average removal efficiencies for methane and benzene/toluene were 90% and 99%, respectively. The pmoA gene copy numbers, responsible for methane oxidation, in the upper layer were higher than those in the lower layer. While type I methanotrohs dominated the lower layer, type II methanotrophs, such as Methylocystis and Methylosinus, were noted to be predominant in the upper layer. Benzene and toluene were removed from the lower layer (-0.6 ∼ -0.9 m) as well as the upper layer. Moreover, the tmoA gene copy number, responsible for benzene/toluene oxidation, seen in the upper layer was not significantly different from those seen in the lower layer. These results suggest that a biocover packed with a soil and earthworm cast mixture is a promising method which could be utilized for the control of methane and volatile organic compounds such as benzene and toluene.
DOI
10.4014/kjmb.1201.01003
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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