不同菌源的微生物对邻苯二甲酸二辛酯生物降解性的比较

从处理石化厂废水的活性污泥中分离出 1株荧光假单胞菌FS 1及处理焦化厂废水的活性污泥中分离出 1株铜绿假单胞菌FS 2和 1株短杆菌FS 3。研究了这 3株菌对邻苯二甲酸二辛酯的最适降解条件 ,比较了其降解特性。荧光假单胞菌FS 1、铜绿假单胞菌FS 2和短杆菌FS 3最适pH分别为 6 5～ 8 0 ,7 0～ 8 0和 7 0～ 8 0 ;温度为 2 0～ 3 5℃ ,1 5～ 3 5℃和 1 5～ 3 5℃。他们对邻苯二甲酸二辛酯的降解反应符合一级动力学特征 ,其半寿期 :荧光假单胞菌FS 1 <铜绿假单胞菌FS 2 <短杆菌FS 3 ;荧光假单胞菌FS 1是一株高效的邻苯二甲酸二辛酯降解菌。 更多还原 

The Comparative Study of Biodegradability of Di-n-octyl Phthalate by Microorganisms from Different Sources

The microbial degradative characteristics of Di-n-octyl phthalate (DnOP) was investigated by strains Pseudomonas fluorescens FS1, Pseudomonas aeruginasa FS2 and Brevibacterium sp. FS3 that were isolated from the activated sludge at a petrochemical factory and a pyrochemical factory. The optimum pH of the 3 strains for degrading of DnOP is 6 5～8 0, 7 0～8 0 and 7 0～8 0; and the temperature is 20～35℃, 15～35℃ and 15～35℃, respectively. The degradation of DnOP by the 3 strains can be described by the first-order reaction model, with the primary biodegradation half lives of DnOP: Pseudomonas fluorescens FS1< Pseudomonas aeruginasa FS2 < Brevibacterium sp. FS3. The experimental results demonstrated that the strain Pseudomonas fluorescens FS1 has strong ability of degrading DnOP.