Characterization of sulfur oxidation by an autotrophic sulfur oxidizer,Thiobacillus sp. ASWW-2 |
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| Authors: | Eun Young Lee Kyung-Suk Cho Hee Wook Ryu |
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| Affiliation: | (1) Department of Environmental Science and Engineering, Ewha Womans University, 120-750 Seoul, Korea;(2) Department of Chemical and Environmental Engineering, Soong Sil University, 156-743 Seoul, Korea |
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| Abstract: | An autotrophic sulfur oxidizer,Thiobacillus sp. ASWW-2, was isolated from activated sludge, and its sulfur oxidation activity was characterized.Thiobacillus sp. ASWW-2 could oxidize elemental sulfur on the broad range from pH 2 to 8. When 5–50 g/L of elemental sulfur was supplemented as a substrate, the growth and sulfur oxidation activity ofThiobacillus sp. ASWW-2 was not inhibited. The specific sulfur oxidation rate of strain ASWW-2 decreased gradually until sulfate was accumulated in medium up to 10 g/L. In the range of sulfate concentration from 10 g/L to 50 g/L, the sulfur oxidation rate could keep over 2.0 g-S/g-DCW-d. It indicated thatThiobacillus sp. ASWW-2 has tolerance to high concentration of sulfate. |
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| Keywords: | autotrophic sulfur oxidizing bacterium elemental sulfur tolerance to sulfate biofilter |
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