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 of Thiobacillus 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 that Thiobacillus sp. ASWW-2 has tolerance to high concentration of sulfate.
| Original language | English |
|---|---|
| Pages (from-to) | 48-52 |
| Number of pages | 5 |
| Journal | Biotechnology and Bioprocess Engineering |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2000 |
Bibliographical note
Funding Information:Acknowledgements This research was funded by the G-7 project from the Ministry of Environment in 1996.
Keywords
- Autotrophic sulfur oxidizing bacterium
- Biofilter
- Elemental sulfur
- Tolerance to sulfate