Quinoline Biodegradation and Its Nitrogen Transformation Pathway by a Pseudomonas sp.Strain
A Pseudomonas sp.strain,which can utilize quinoline as its sole carbon,nitrogen and energy source,was isolated from activated sludge in a coking wastewater treatment plant.Quinoline can be degraded via the 8-hydroxycoumarin pathway.We quantified the first two organic intermediates of the biodegradation,2-hydroxyquinoline and 2,8-dihydroxyquinoline in order to explore its characteristics.The study focused on the transformation of the nitrogen in quinoline under different C/N ratios (g/g) of two media.At least 40.4% of the nitrogen was finally transformed into ammonium with quinoline as the sole C and N source.Besides,an external carbon source accelerated the transformation of N from NH3 into NO3-,NO2-,and then into N2.The product analysis and gene characteristics indicates that the isolate accomplished (produced)heterotrophic nitrification and aerobic denitrification simultaneously.The study also demonstrates that quinoline and its metabolic products can be eliminated if the C/N ratio is properly controlled during the treatment of quinoline-containing wastewater.
Pseudomonas sp. Quinoline Biodegradation Nitrification Denitrification
Cui ZHAO Yaohui BAI Qinghua SUN Donghui WEN Xiaoyan TANG
College of Environmental Sciences and Engineering,Peking University,Beijing 100871,P.R.China
国际会议
The 2nd China-Japan Graduate Student Forum -- Life, Environment and Energy (第二届中日研究生论坛--生命,环境与能源)
北京
英文
278-287
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）