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Screening and characterization of self-producing biosurfactant bacteria for dimethyl disulfide deodorization
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Jiangli WU1, Lei SUN2, Dan YUAN2, Shungang WAN2, *
Acta Microbiologica Sinica | 2025, 65(8) : 3615 - 3629
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Acta Microbiologica Sinica | 2025, 65(8): 3615-3629
• Research Article •
Screening and characterization of self-producing biosurfactant bacteria for dimethyl disulfide deodorization
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Jiangli WU1, Lei SUN2, Dan YUAN2, Shungang WAN2, *
Affiliations
  • 1.School of Ecology, Hainan University, Haikou, Hainan, China
  • 2.School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, China
Published: 2025-08-04 doi: 10.13343/j.cnki.wsxb.20250049
Outline
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Microbial deodorization is an effective technology for treating odorous waste gases, in which microbial strains play a decisive role. [Objective] To screen the strains capable of degrading dimethyl disulfide (DMDS) and investigate their degradation efficiency and ability to produce surfactants under various conditions. [Methods] DMDS, a typical sulfur-containing odorous organic compound, was selected as the sole carbon source. A strain R1 capable of simultaneously producing biosurfactants and degrading DMDS was isolated from mangrove sludge. The strain was identified based on the physiological and biochemical characteristics analysis and 16S rRNA gene sequencing. The types of self-produced biosurfactants were determined using infrared spectroscopy and nuclear magnetic resonance spectroscopy analysis. [Results] Based on physiological and biochemical characteristics and 16S rRNA gene sequence, strain R1 was identified as Achromobacter sp. The strain was capable of degrading DMDS, with optimal degradation conditions of an initial DMDS concentration of 12.49 mg/L, a system temperature of 30 ℃, and an inoculum amount of 1.0 g/L, under which the DMDS degradation rate reached 70.74%. Emulsification experiments showed that strain R1 can use DMDS as a carbon source to produce biosurfactants, which were identified as glycolipids through nuclear magnetic resonance and infrared spectroscopy. [Conclusion] The main intermediate product in the biodegradation of DMDS is methyl mercaptan, and the transformation rate of sulfur to SO42- is 65.99%. Strain R1 exhibits impressive performance in degrading DMDS and producing biosurfactants.

dimethyl disulfide  /  biodegradation  /  isolation and identification  /  biosurfactant  /  deodorization
Jiangli WU, Lei SUN, Dan YUAN, Shungang WAN. Screening and characterization of self-producing biosurfactant bacteria for dimethyl disulfide deodorization[J]. Acta Microbiologica Sinica, 2025 , 65 (8) : 3615 -3629 . DOI: 10.13343/j.cnki.wsxb.20250049
Funding
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  • Hainan Provincial Natural Science Foundation(425RC684)
  • National Natural Science Foundation of China(32060291)
Appendix
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Year 2025 volume 65 Issue 8
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Article Info
doi: 10.13343/j.cnki.wsxb.20250049
  • Receive Date：2025-01-17
  • Online Date：2026-02-06
  • Published：2025-08-04
Article Data
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History
  • Received：2025-01-17
  • Accepted：2025-03-05
Funding
Hainan Provincial Natural Science Foundation(425RC684)
National Natural Science Foundation of China(32060291)
Affiliations
    1.School of Ecology, Hainan University, Haikou, Hainan, China
    2.School of Chemistry and Chemical Engineering, Hainan University, Haikou, Hainan, China

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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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