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KMID : 0880220080460010023
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Journal of Microbiology
2008 Volume.46 No. 1 p.23 ~ p.28
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Removal of Heavy Metals by an Enriched Consortium
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Lee Eun-Young
Lee Yoo-Kyung
Lim Joung-Soo
Oh Kyung-Hwan
Lee Jae-Yeon
Kim Seog-Ku
Kim Keun
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Abstract
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An enriched consortium obtained from lake-sediment was developed for the removal of heavy metals such as Cu, Pb, Cr, Ni, and Zn from heavy metal-contaminated water. The removal efficiency of heavy metals in a shaking condition was generally higher than that in the static state. After the fifteenth enrichment with assorted heavy metals, the removal efficiencies in the shaking and static condition at an average concentration of 100 mg/L of each heavy metal were approximately 99~100% and 95~100%, respectively, depending on the type of heavy metal. An aerobically grown, pure culture isolated from an enriched culture was analyzed by 16S rRNA sequencing and identified as Ralstonia sp. HM-1. This strain was found to remove various heavy metals with an efficiency of approximately 97~100% at an average concentration of 200 mg/L of each heavy metal.
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KEYWORD
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removal of heavy metals, enriched consortium, Ralstonia sp
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