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气体中硫化氢的存在不仅会引起设备和管道腐蚀、催化剂中毒，而且还会严重地威胁人身健康与安全，因此必须采用经济有效的方法予以脱除。与传统物理化学脱硫方法相比，微生物方法反应条件温和、化学品与能源的消耗量大大降低、运行成本低，并且也无二次污染产生，因而具有极大的发展前景。为此讨论了硫化氢的微生物脱除原理及脱除方法的最新进展；总结了自然界中能够氧化硫化氢的微生物；详细探讨了它们在微生物脱硫过程中的应用现状与工艺流程，包括光合硫细菌、异氧菌、硫杆菌等的脱硫条件、脱硫效率、除硫产物及适用范围，并对它们脱除硫的优缺点进行了比较说明；还对今后微生物脱硫的前景与发展方向进行了展望。

METHOD TO REMOVE HYDROGEN SULFIDE FROM SOUR GAS BY MICROORGANISMS 1)

Hydrogen sulfide existing in gas will not only cause the corrosion of equipment and pipeline and the catalyst poison, but also threaten the health and safety of human being severely. So it should be removed with economic and effective ways. Comparing with the traditional physical/chemical desulfuration methods, the desulfuration method by microorganisms has the advantages of moderate reaction conditions, much lower consumption of chemicals and energy, low operation cost and no secondary pollution. So it has great developing prospect. Here is introduced the new progress of the principle and methods of desulfuration by microorganisms. It is summed the microorganisms that can oxygenate hydrogen sulfide in the nature. It is discussed in detail the current application status and process flow sheet of the desulfuration by microorganisms, including the desulfuration conditions, the desulfuration efficiency, the desulfuration products and the applicable range of the photosynthesis sulfur bacteria, the strange oxygen bacterium, the thiobacilli etc. Their advantages and disadvantages of desulfuration are compared. Also the prospect and developing direction of desulfuration by microorganisms are predicted.