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Isolation of Calcite Forming Bacteria and Soil Bio-consolidation with Various Calcium Salts

탄산칼슘 생성 균주의 분리 및 다양한 칼슘원에 따른 토양 고결화

  • Gu, Takyong (Department of Biological Engineering, Inha University) ;
  • Kang, Chang-Ho (Department of Biological Engineering, Inha University) ;
  • Shin, Yujin (Department of Biological Engineering, Inha University) ;
  • So, Jae-Seong (Department of Biological Engineering, Inha University)
  • Received : 2017.02.27
  • Accepted : 2017.07.06
  • Published : 2017.09.30

Abstract

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 $15^{\circ}C$ 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.

Keywords

Acknowledgement

Supported by : 한국연구재단

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