Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Growth Characteristics of Acidithiobacillus thiooxidans in Different Sulfur Concentrations

황 농도에 따른 Acidithiobacillus thiooxidans의 생장 특성

  • Lee, Eun-Young (Department of Environmental Engineering, University of Suwon) ;
  • Cho, Kyung-Suk (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Ryu, Hee-Wook (Department of Chemical and Environmental Engineering, Soong Sil University)
  • 이은영 (수원대학교 환경공학과) ;
  • 조경숙 (이화여자대학교 환경공학과) ;
  • 류희욱 (숭실대학교 환경.화학공학과)
  • Published : 2006.12.28
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Abstract

The growth characteristics of sulfur-oxidizing bacteria, Acidithiobacillus thiooxidans AZ11, MET, and TAS were investigated in mineral salt media supplemented with elemental sulfur of 1$\sim$50 g $L^{-1}$. The sulfur oxidation rates of A. thiooxidans. MET and TAS increased highly with increasing sulfur concentration up to 10 g L$^{-1}$, but the rates increased slowly in sulfur concentration over 10 g L$^{-1}$. A. thiooxidans AZ11 showed the parallel increase of sulfur oxidation rate until sulfur concentration increased up to 40 g L$^{-1}$. The maximum sulfur oxidation rates (V$_{max}$) of AZl1, MET and TAS were 1.88, 1.38 and 0.43 g S L$^{-1}$ d$^{-1}$, respectively. The maximum specific growth rates (${\mu}_{max}$) of AZ11, MET, and TAS were 0.33 d$^{-1}$, 0.30 d$^{-1}$ and 0.45 d$^{-1}$, respectively. Although MET and TAS couldn't grow at sulfate concentration of 40 g L$^{-1}$, AZ11 could grow in the presence of 58 g L$^{-1}$ sulfate, the final oxidation product of elemental sulfur.

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References

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