施氏假单胞菌UP-1降解二苯并噻吩的动力学模型

对施氏假单胞菌(UP-1)降解二苯并噻吩（DBT）的过程进行了宏观动力学研究，以Michaelis-Menten方程为基础确定了UP-1降解DBT的动力学模型。计算得到动力学参数vmax=84.75 mg/(l·h)， Km=759.59 mg/l。通过相关指数R2和F值检验，该动力学模型高度显著，两个重要参数取值可信。在考察的底物浓度范围内菌株UP-1降解DBT过程不存在底物抑制作用，但存在产物抑制作用。求得的UP-1休止细胞降解DBT的最大降解速率为88.5 mmol/(kg DC·h)，其降解脱硫能力优异。

KINETIC MODEL OF DIBENZOTHIOPHENE BIODEGRADATION BY Pseudomonas stutzeri UP-1

The macro-kinetic study of dibenzothiophene(DBT) biodegradation by Pseudomonas stutzeri UP-1 was carried out. Based on Michaelis-Menten equation, the kinetics model of DBT degradation by UP-1 was obtained. The kinetic parameters of DBT degradation by UP-1, vmax and Km, were 84.75 mg/(l·h) and 759.59mg/l, respectively. Being verified by correlation index R2 and F value, the kinetics model had higher significance level and the value of the two important parameters was creditable. It was determined that there was no substrate inhibition action, but degradation products had anti-competitive inhibition action for UP-1 to the degradation of DBT. It should also be noted that the maximum degradation rate of DBT by UP-1 was 88.5 mmol/(kg DCW·h), meaning that UP-1 was a bacteria with high ability of desulfurization.