6种挥发性有机物在甲苯驯化微生物中的好氧生物降解性能  

Aerobic Biodegradation Performance of Six Volatile Organic Compounds by Activated Sludge Acclimated with Toluene

作　　者：张鹤清[1] 胡洪营[1] 席劲瑛[1] 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《环境科学》2003年第6期83-89,共7页Environmental Science

基　　金：清华大学 985支持项目

摘　　要：利用振荡摇瓶法测定了 6种典型挥发性有机物 ,甲苯、邻二甲苯、间二甲苯、对二甲苯、苯和氯苯在甲苯驯化微生物中的好氧生物降解性能 .结果表明 ,在本研究的液相浓度范围内 (甲苯 <1 74mg/L ,邻二甲苯 <1 4 9mg/L ,间二甲苯 <1 2 9mg/L ,对二甲苯 <1 33mg/L ,苯 <2 34mg/L ,氯苯 <1 4 6mg/L) ,3种二甲苯、苯和氯苯的降解速率随其初始浓度的增大而增加 ,符合一级反应 ,这 5种VOCs未对微生物产生明显的抑制或毒害作用 ;甲苯的液相浓度大于 85mg/L时 ,其降解速率不随初始浓度的增大而改变 ,其降解规律符合Monod方程 .The degradation performance of six volatile organic compounds (VOCs), toluene, o-xylene, m-xylene, p-xylene, benzene and chlorobenzene by activated sludge acclimated with toluene were studied. The experimental results showed that the biodegradation rates of o-xylene, m-xylene, p-xylene, benzene and chlorobenzene increased with increasing of their initial liquid concentration; when concentrations of o-xylene, m-xylene, p-xylene, benzene and chlorobenzene were less than 149mg/L, 129mg/L, 133mg/L, 234mg/L and 146mg/L respectively, neither of them brought any notable inhibition or poisonous effects on microbes, and their aerobic biodegradation accorded with first-order reaction. When concentrations of toluene were more than 85mg/L, its biodegradation rate didn't increase with increasing of its initial liquid concentration and the biodegradation of toluene accorded with the Monod equation.

关 键 词：挥发性有机物 好氧生物降解 甲苯 苯 二甲苯 氯苯 

分 类 号：X131[环境科学与工程—环境科学]