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Removal of High Strength Hydrogen Sulfide Gas using a Bioreactor Immobilized with Acidithiobacillus ferrooxidans and a Chemical Absorption Scrubber  

Ryu, Hui-Uk (Department of Chemical and Environmental Engineerin& Soongsil University)
Publication Information
Microbiology and Biotechnology Letters / v.32, no.4, 2004 , pp. 328-333 More about this Journal
Abstract
To treat a waste gas containing a high strength H2S, the two-stages microbial desulfurization process that conof a bioreactor immobilized with Acidithiobacillusferrooxidans and a chemical absorption scrubber has was proposed. After 4 times repeat of batch cultures, the immobilized bioreactor has been stabilized and the rate of iron oxidation reached 0.89 kg . $m^{-3}{\cdot}m^{-1}$ at steady state. The two-stages microbial desulfurization prowas able to be operated for a long term over 54 days. The removal efficiencies of H2S were 97-99% at a space velocity of 70 h-I and a inlet concentration of 37,000 ppmv. The maximum elimination capacity of H2S was approximately 3.3 kg S . $m^{-3}{\cdot}m^{-1}$. In the bioractor, the concentrations of the $Fe^{3+}$ and the immobilzed cell were constantly maintained during the desulfurization.
Keywords
Microbial desulfurization process; Acidithiobacillus ferrooxidans; hydrogen sulfide; immobilized bioreactor;
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