摘要
用聚集～交联法固定化胶质红环菌，并在微氧、厌氧条件下，对其降解吡啶的动力学进行研究。实验结果表明：在微氧、厌氧条件下，未驯化的固定化胶质红环菌，在吡啶浓度为100mg/L时，降解动力学方程均遵循零级反应，微氧条件下降解速率常数大于厌氧条件下降解速率常数，该菌适于在微氧条件下降解吡啶。固定化胶质红环菌经驯化后，在微氧条件下，吡啶浓度为50mg／L、100mg／L、200mg／L、300mg／L和500mg／L时，降解动力学方程仍然遵循零级反应，吡啶初始浓度为50～200mg／L时，降解速率常数随着吡啶初始浓度增大而增大；吡啶初始浓度为300～500mg／L时，降解速率常数随着吡啶初始浓度增大而减小。固定化胶质红环菌在微氧条件下，可将吡啶中的氮大部分转化为氨氮。
Immobilized Rhodocyclus gelatinosus is prepared by aggregation-cross bridging method, and its kinetics is also performed for degradation of pyridine under microaerobic and anaerobic conditions. The results show that when pyridine concentration is 100 mg/L, pyridine degradation kinetic equation by untamed immobilized Rhodocyclus gelatinosus follows the zero-order under microaerobic and anaerobic conditions. The degradation rate constant under microaerobic condition is bigger than that under anaerobic condition, indicating that the bacteria is fit for degradation under microaerobic condition. Pyridine degradation by tamed immobilized Rhodocyclus gelatinosus also follows the zero-order. The degradation rate constant increases with the increase of initial pyridine concentration in the range of 50 -200 mg/L, while the degradation rate constant decreases with the increase of initial pyridine concentration in the range of 300 - 500 mg/L. Under microaerobic condition, nitrogen in pyridine can be converted into ammonia.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2008年第4期522-525,共4页
Journal of Nanjing University of Science and Technology
基金
山西省归国人员研究基金(98-040)
关键词
固定化细胞
吡啶
动力学
降解速率
immobilized cells
pyridine
kinetics
degradation rate
