固定化细胞降解2,4-二氯酚的动力学及其对SBR系统强化效果研究

Biodegradation Kinetics of 2,4-dichlorophenol by Immobilized Bacteria and Bioaugmentation in SBR System with the Immobilized Culture

将降解 2 ,4 二氯酚 (简称 2 ,4 DCP)的高效菌固定化后 ,研究了半连续流实验中固定化细胞降解活力的变化及 2 ,4 DCP降解的动力学 ,并比较了固定化高效菌强化的SBR系统与不加固定化高效菌的对照系统长期运行时对目标物的降解特性 .结果表明 :固定化细胞的降解活性会在半连续流降解实验中得到恢复与增强 ,固定化细胞对 2 ,4 DCP的降解遵循零级反应动力学 .投加固定化菌的强化SBR系统较不加固定化菌的对照系统具有启动时间短 ,耐冲击负荷能力强的特点 .进水为混合基质或目标物非持续性存在下 ,长期运行中 。

Biodegradation of 2,4-dichlorophenol (2,4-DCP) by mixed culture immobilized in PVA gel beads under fed-batch operation was studied. The biodegradation kinetics was also investigated. In addition, the abilities to degrade the target compound were compared in the SBR system augmented with immobilized special culture and the control system under long-term operation. Results showed that bioactivity of the immobilized cells was recovered and improved in the process of fed-batch test. The kinetics of 2,4-DCP biod...