红串红球菌TJQ对不同形式硫的脱除研究

红串红球菌TJQ是本实验室筛选的一株专一性脱硫菌，高效液相色谱法（HPLC）分析表明．该菌能选择性地脱除二苯并噻吩（DBT）中的硫，最终代谢产物是2-羟基联苯（2-HBP）。实验结果表明，该菌既可以利用有机硫源又可以利用廉价的无机硫源作为生长硫源，以硫酸钠作为硫源培养的菌株可专一性脱除苯并噻吩（BT）和DBT及其甲基衍生物4，6-二甲基二苯并噻吩（4，6-DMDBT）中的硫。除此之外，它还可以脱除苯硫醚（PS）和硫醇类含硫化合物中的硫。在正十六烷模拟体系中菌株对噻吩（TH）、4，6-DMDBT、DBT等类型的硫的降解效率很高，对BT和PS类硫的降解效率也较好。它可以使实际柴油中总硫含量由554mg／L降到267mg／L，降解率达到51．8%。

A New Strain for Removing the Sulfur of Different sulfides

A newly isolated strain was identified as rhodococcus erythropolis TJQ,which can specifically remove sulfur from the model compound of dibenzothiophene with 2-hydroxydiphenyl as the dead-end metabolic product.Rhodococcus erythropolis TJQ can use both organic and inorganic sulfur as vegetal sulfide.The strain growing with sodium sulfate can effectively desulfurize benzothiophene(BT) DBT and its derivatives 4,6-dimethyldibenzothiophene(4,6-DMDBT).Besides,it can degrade the sulfur in phenyl sulfide and dodecanethiol.The result of degradation of the model compounds TH,4,6-DMDBT,DBT in n-hexcedecane is better and the desulfurization of PS and BT is effective too.It can decrease the total sulfur of diesel oil from 554 ppm to 267 ppm with the rate of 51.8%.