摘要
喹啉是焦化废水中的难降解有机物之一,以喹啉为唯一碳氮源从某焦化废水处理厂活性污泥中分离出1株喹啉降解菌KDQ3,16S r DNA序列分析表明KDQ3为Ochrobactrum sp.,其对喹啉降解的最适条件为37℃和初始pH 7.0~8.0,喹啉降解动力学符合Haldane模型.KDQ3能在10.4 mg·L^(-1)Cr(Ⅵ)存在时降解200 mg·L^(-1)喹啉.此外,KDQ3能在实际好氧池焦化废水环境中降解喹啉和提高COD去除率,说明该菌具有生物强化焦化废水的应用潜力.
Quinoline is one of the common refractory organic pollutants in coking wastewater. An aerobic bacterial strain KDQ3 capable of utilizing quinoline as the sole source of carbon,nitrogen and energy was isolated from activated sludge of a coking wastewater treatment plant. The morphological properties and the 16 S r DNA sequence identified KDQ3 as Ochrobactrum sp.. The optimized temperature and initial pH for quinoline degradation were 37℃ and 7. 0-8. 0,and the degradation kinetics fit with Haldane＇s model.KDQ3 could degrade 200 mg·L^-1quinoline in the presence of 10. 4 mg·L^-1hexavalent chromium. In addition,KDQ3 was able to degrade quinoline in real coking wastewater of aerobic tank and improve the removal of COD,indicating that KDQ3 had the potential of bioaugmentation for removal of quinoline from coking wastewater.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2017年第5期2030-2035,共6页
Environmental Science
基金
国家自然科学基金项目(31370281
U1632111)
中央高校基本科研业务费专项(2010YH05)
全国大学生创新训练计划项目(C201603062)
关键词
焦化废水
苍白杆菌
喹啉
降解动力学
生物强化
coking wastewater
Ochrobactrum sp.
quinoline
degradation kinetics
bioaugmentation
