两株柴油降解菌的性能研究  

Study on Degradation of Diesel Oil by Two Bacterial Strains

作　　者：马宏瑞[1] 赵敏[1] 杜战鹏[1] 张景飞[2] 

机构地区：[1]陕西科技大学资源与环境学院,陕西咸阳712081 [2]南京大学地球科学系,江苏南京210093

出　　处：《化工环保》2007年第2期105-108,共4页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金资助项目(40502024);陕西省自然科学基金资助项目(2002B16)

摘　　要：以0#柴油为惟一碳源,对两株柴油降解菌DS-Ⅰ菌和DS-Ⅲ菌降低液体表面张力的能力、柴油降解动力学及表面活性物质成分进行了研究。实验结果表明:DS-Ⅰ菌和DS-Ⅲ菌在生长过程中均可产生糖脂类生物表面活性物质,使发酵液表面张力降低;在11d的发酵时间内,DS-Ⅰ菌和DS-Ⅲ菌使发酵液中柴油的质量浓度从48.72m g/L分别降至16.64m g/L和9.17m g/L,柴油降解率分别为65.84%和81.18%,柴油降解速率分别为5.16m g/(L.d)和5.96m g/(L.d)。发酵液表面张力的降低与柴油的降解效果有显著的相关性。DS-Ⅲ菌在疏水性、对柴油的生长适应性和柴油降解速率等方面比DS-Ⅰ菌更好。The degradation of diesel oil 0^# used as sole carbon source by the two bacterial strains DS-Ⅰ and DS-Ⅲ were studied on the depression of liquor surface tension, the degradation dynamics of the diesel oil and the composition of surface active substance. The results show that DS-Ⅰ and DS-Ⅲ can produce glycolipid biosurfactants and depress the surface tension of fermentation broth. The diesel oil concentration in fermentation liquor is reduced from 48.72 mg/L to 16.64 mg/L and 9.17 mg/L by DS-Ⅰ and DS-Ⅲ respectively in eleven days of fermentation with 65. 84% and 81. 18% of the degradation efficiency and 5.16 mg/（L ~ d） and 5.96 mg/（ L ~ d） of degradation rates, The results show also that the depression of liquor surface tension is related obviously with the degradation effect of the diesel oil; And DS-Ⅲ has advantage over DS-Ⅰ in hydrophobicity, adaptability to the diesel oil and degradation rate of the diesel oil.

关 键 词：石油烃 柴油 微生物降解 疏水性 生物表面活性剂 

分 类 号：X172[环境科学与工程—环境科学]