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Biodesulfurization of diesel oil in oil–water two phase reaction system by Gordonia sp. SC-10

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Abstract

Objectives

Different sulfur contents of diesel oils were used for biodesulfurization to study the desulfurization capacity of Gordonia sp. SC-10 in oil–water two-phase reaction system.

Results

Gordonia sp. SC-10 showed great properties in desulfurizing diesel oil with different sulfur contents. This bacterium could decrease sulfur contents in different diesel oils from 194.7 ± 3.7 to 30.4 ± 0.5 mg/l and from 3035.3 ± 23.8 to 1792.8 ± 48.9 mg/l, respectively. Furthermore, this bacterium could desulfurize broad range of organosulfur compounds and had strong desulfurization activity against alkylated DBTs. For low-sulfur diesel oil, sulfur could be removed from 10.2 ± 0.1 to 5.0 ± 0.1 mg/l.

Conclusions

The newly isolated bacteria Gordonia sp. SC-10 showed a good performance in desulfurizing diesel oils, and it might be a useful desulfurizing biocatalyst to enable the industrialized application of biodesulfurization process.

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Acknowledgements

This study was funded by the Fundamental Research Funds for the Central Universities (Grant No. 16CX06008A).

Supporting information

Supplementary Figure 1—Two of the samples after 5 days of cultivation. Each flask contained 50 ml of SF medium supplemented with 5 ml of light cycle oil (LCO) and was cultivated at 160 rpm and 30 °C for 5 days. (a) was the blank sample (uninoculated sample after treatment under the same conditions); (b) was the sample added with Gordonia sp. SC-10. No oil droplet formed in the blank samples. In samples added with Gordonia sp. 10, the bacteria adhered to the oil-water interface and formed an upper emulsion layer, and the average size of oil droplets was about 30.3 μm (measured by optical microscope). No evaporation of water was observed within five days.

Supplementary Table 1—Abbreviations and structural formulas of sulfur components.

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Correspondence to Chaocheng Zhao.

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Supplementary Table 1 (DOCX 240 kb)

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Chen, S., Zhao, C., Liu, Q. et al. Biodesulfurization of diesel oil in oil–water two phase reaction system by Gordonia sp. SC-10. Biotechnol Lett 41, 547–554 (2019). https://doi.org/10.1007/s10529-019-02663-9

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  • DOI: https://doi.org/10.1007/s10529-019-02663-9

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