Hydrogen Sulfide Removal From Petroleum Refinery by Immobilized Thiobacillus ferrooxidans in Fixed-bed Bioreactor

摘要

In order to remove hydrogen sulfide from petroleum refinery, a fixed-bed bioreactor was constructed by the immobilized Thiobacillus ferrooxidans (T.f) with H-3 carrier. In the state of bioreactor operation, a maximum Fe~(2+) oxidation of 7.24 g/L.h was attained with the aeration of 300 L/h, the dilution rate of 0.6 h~(-1), the pH of 2.0, and the temperature of 30°C. And the complex compound forming on the surface of the carrier in the operation of bioreactor was identified as jarosite by chemical analysis and X-ray diffraction analysis. In the fixed-bed bioreactor, the removal of hydrogen sulfide was higher than 99.12 percent, and the content of H_2S in the exhaust was less than 10 mu g/g.