Quinoline biodegradation and its nitrogen transformation pathway by a <Emphasis Type="Italic">Pseudomonas</Emphasis> sp. strain |
| |
Authors: | Yaohui Bai Qinghua Sun Cui Zhao Donghui Wen Xiaoyan Tang |
| |
Institution: | (1) College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, People’s Republic of China; |
| |
Abstract: | 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. We tracked the transformation
of the nitrogen in quinoline in two media containing different C/N ratios. At least 40.4% of the nitrogen was finally transformed
into ammonium when quinoline was the sole C and N source. But addition of an external carbon source like glucose promoted
the transformation of N from NH3 into NO3
−, NO2
−, and then to N2. The product analysis and gene characteristics indicated that the isolate accomplished heterotrophic nitrification and aerobic
denitrification simultaneously. The study also demonstrated that quinoline and its metabolic products can be eliminated if
the C/N ratio is properly controlled in the treatment of quinoline-containing wastewater. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|