生物脱硫机理及其研究进展

生物脱硫是８０年代发展起来的常规脱硫替代新工艺，通过微生物菌群的作用，可将硫化物转化成单质硫并回收，在生物脱硫过程中，氧化态的含硫污染物必须先经生物还原作用生成硫化物或Ｈ２Ｓ。然后再经生物氧化过程生成单质硫，才能去除。该文着重介绍了光合细菌和无色硫细菌的脱硫机理及其影响因素，光合细菌脱硫，由于条件苛刻，研究进展不大，仍处于分批试验或实验室小试阶段；无色硫细菌脱硫，近年来很活跃，并取得一些进展，已进

Mechanism of Biological Desulfurization and Its Progress

Biological desulfurization was developed in 1980's, considered as an alternative to physicochemical methods, in which sulfide was converted into elemental sulfur by microorganism community, moreover elemental sulfur could be recovered. In the biotechnological desulfurization process, first of all, the pollutant containing sulfur of oxidation state was changed into sulfide or H2S as a result of biological reduction, then could be removed after being converted into elemental sulfur by biological oxidation. This paper introduced emphatically the mechanism of desulfurization by using photosynthetic bacteria and colourless sulfur bacteria and the influencing factors. Being the harsh condition, desulfurization using photosynthetic bacteria did not make great progress, only in a batch experiment or small-scale test stage. The study of desulfurization using colourless sulfur bacteria was very active in recent years, for which some progresses were made, and a medium-scale test and full-scale test have been carried out, and achieved good result. By comparison with traditional physicochemical methods, the biological desulfurization offered many advantages.