Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Hydrogen Sulfide Removal by Immobilized Thiobacillus novellas on $SiO_2$ in a Fluidized Bed Reactor

  • Cha, Jin-Myung (B&E Tech Co., Ltd.) ;
  • Shin, Hyun-Jae (Department of Chemical & Biochemical Engineering, Chosun University) ;
  • Roh, Sung-Hee (Department of Chemical & Biochemical Engineering, Chosun University) ;
  • Kim, Sun-Il (Department of Chemical & Biochemical Engineering, Chosun University)
  • Published : 2007.02.28
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Abstract

The removal of hydrogen sulfide ($H_2S$) from aqueous media was investigated using Thiobacillus novellas cells immobilized on a $SiO_2$ carrier (biosand). The optimal growth conditions for the bacterial strain were $30^{\circ}C$ and initial pH of 7.0. The main product of hydrogen sulfide oxidation by T. novellus was identified as the sulfate ion. A removal efficiency of 98% was maintained in the three-phase fluidized-bed reactor, whereas the efficiency was reduced to 90% for the two-phase fluidized-bed reactor and 68% for the two-phase reactor without cells. The maximum gas removal capacity for the system was 254 g $H_2S/m^3/h$ when the inlet $H_2S$ loading was $300g/m^3/h(1,500ppm)$. Stable operation of the immobilized reactor was possible for 20 days with the inlet $H_2S$ concentration held to 1,100 ppm. The fluidized bed bioreactor appeared to be an effective means for controlling hydrogen sulfide emissions.

Keywords

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