Isolation And Study On Biological Characteristics Of Sulfate-Reducing Bacteria For The Desulfurization Of Coal-Smoke

In strict non-oxygen conditions, the sulfate-reducing bacteria were isolated from the samples collected from regions in amount of sulfur by sulfate media, and 11 pure strains were obtained. Their abilities to reducing sulfate were tested. The results show that the efficiency of D6 reducing sulfate was the highest. The efficiency of D6 reducing sulfate amounted to 43.14% after 4 days, which was 1~3 times of any other strains'. The optimal temperature of D6 is 30℃, the optimal pH ,7.0. The growth of D6 makes use of glucose, malt sugar, lactose, cane sugar, lactic acid, ethanol, glycerin, glycine, but no acetic acid and n-butanol. It can grow in Na2SO4, Na2SOa, Na2S2O3 and S media, and Na2S2O3 is the best substrate. The results from D6's morphological characters, colonial type, Gram's staining and a series of physiologic and biochemical experiments reveales that the strain of D6 is Desulfovibrio vulgaris Postgate and Campbell.