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KMID : 0380020120270040268
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Korean Journal of Biotechnology and Bioengineering
2012 Volume.27 No. 4 p.268 ~ p.272
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Environmental Stress Response of Calcite Forming Bacteria Isolated from Concrete Pavement
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Han Sang-Hyun
Kim Sung-Keun
Kang Chang-Ho
Park Joo-Young
Jeong Jin-Hoon
So Jae-Seong
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Abstract
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Microbially induced calcite precipitation (MICP) has been explored for protection and consolidation of construction materials such as concrete. In this study, we isolated 54 calcite forming bacteria from concrete pavement and selected 5 isolates which showed high specific urease activity. Also response of the 5 strains against various environmental stresses was examined. BC 4 and BC 5 showed 35% and 26% viability at heat stress (50oC), respectively. BC 1 and BC 4 maintained 60.4% and 70.4% viability upon osmotic stress (1 M NaCl), respectively. Among the 5 isolates BC 4 had the highest viability upon alkaline stress (pH 10).
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KEYWORD
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Bio-concrete, Sporosarcina pasteurii KCTC3558, MICP, Specific urease activity
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