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KMID : 0380020170320030206
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Korean Journal of Biotechnology and Bioengineering
2017 Volume.32 No. 3 p.206 ~ p.211
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Isolation of Calcite Forming Bacteria and Soil Bio-consolidation with Various Calcium Salts
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Gu Tak-Yong
Kang Chang-Ho
Shin Yu-Jin
So Jae-Seong
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Abstract
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The physical method used to prevent a landslide has the risk of environmental pollution. Calcite forming bacteria (CFB) have been received increasing attention as a novel and environmental friendly strategy for the soil improvement. In this study, we selected 11 CFB strains with high calcite production. We also examined survivability and calcite productivity of the strains under various stress conditions to select strains with high resistance to various stresses. Two strains was selected by environment stress. Sphingobacterium sp. KJ-32 and Viridibacillus arenosi B-25 precipitate calcite more than other strains at pH 5 and 15oC respectively. Bio-consolidated soil cakes were made using various calcium salts (calcium chloride, calcium acetate, calcium lactate, calcium gluconate) with mixed culture of 2 strains. Among them, the calcite made using calcium chloride was the largest. These observations demonstrate that this bio-consolidation technology has the potential for eco-friendly prevention of landslide and soil improvement.
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KEYWORD
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Land slide, Calcite forming bacteria, Environment stress, Soil improvement, Calcium salts
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