Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
권호 표지

Simultaneous Removal of Hydrogen Sulfide and Ammonia Using Thiobacillus sp. IW in a Three-Phase Fluidized-Bed Bioreactor

  • Kum, Sung-Hoon (Department of Environmental Engineering, Pusan National University) ;
  • Oh, Kwang-Joong (Department of Environmental Engineering, Pusan National University) ;
  • Moon, Jong-Hae (Department of Chemical Engineering, Inje University) ;
  • Kim, Dong-Uk (Department of Chemical Engineering, Inje University)
  • Published : 2000.06.01
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Abstract

A three-phase fluidized-bed bioreactor including Thiobacillus sp. IW was tested to remove H_2S and $NH_3$ simultaneously. The inlet $H_2S$ was oxidized to $SO_4^{2-}$ by Thiobacillus sp. IW, and the $NH_3$ reacted with the $SO_4^{2-}$ to form $(NH_4)_2SO_4$. The removal efficiency of $H_2S$ was 98.4-99.9% for an inlet concentration of 36-730 ppm and that of $NH_3$ was 60.2-99.2% for an inlet concentration of 45-412 ppm. The removal efficiency of $NH_3$ was reduced when the inlet loading rate of $NH_3$ was increased above 10 mg/l/h. When the bioreactor was operated for 25 days with a lower inlet concentration of $NH_3$ compared with the of $H_2S$, the bioreactor exhibited an excellent performance with a stable pH, dissolved oxygen content, and cell concentration.

Keywords

References

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