Drivers of nitrous oxide accumulation in denitrification biofilters with   low carbon:nitrogen ratios

doi:10.1016/j.watres.2016.09.046

CORC > 北京大学 > 环境科学与工程学院

	Drivers of nitrous oxide accumulation in denitrification biofilters with low carbon:nitrogen ratios
	Zhang, Yan ; Ji, Guodong ; Wang, Rongjing
刊名	WATER RESEARCH
	2016
关键词	Nitrous oxide accumulation Denitrification biofilter Functional gene Quantitative relationship C/N ratio FLOW CONSTRUCTED WETLAND STRENGTH NITRATE WASTE WATER TREATMENT PLANTS N2O EMISSION C/N RATIO SCALE REMOVAL REACTOR COMMUNITIES CONSTRAINTS
DOI	10.1016/j.watres.2016.09.046
英文摘要	Heterotrophic denitrification is usually inhibited by insufficient carbon sources; however, the underlying mechanisms responsible for nitrous oxide (N2O) accumulation within denitrification at low carbon:- nitrogen (C/N) ratios have not been quantified from a molecular level. In this study, five denitrification biofilters were developed and exhibited efficiency (total nitrogen: 18.5%-92.2%; nitrate nitrogen: 42.9% 99.5%; chemical oxygen demand: 50.5%-93.7%) in remediating micro-polluted water with C/N ratios ranging between 0.65 and 3.0. A combined analysis revealed that the coupling of anaerobic ammonium oxidation (ANAMMOX) and denitrification accounted for N2O accumulation in the biofilters, and the key drivers of the N2O accumulation rates were qnorB/nirK, nosZ/(narG + napA), amx/(nirS + nirK), narG/bacteria and qnorB/bacteria. Our study demonstrated that genetic association was indicative of microbial processes relative to nitrogen cycling and reflected N2O flux within denitrification biofilters at low C/N ratios. (C) 2016 Elsevier Ltd. All rights reserved.; Key Project of China Spark Program [GL2015007]; Collaborative Innovation Center for Regional Environmental Quality; SCI(E); EI; PubMed; ARTICLE; jiguodong@pku.edu.cn; 79-85; 106
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/492648]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhang, Yan,Ji, Guodong,Wang, Rongjing. Drivers of nitrous oxide accumulation in denitrification biofilters with low carbon:nitrogen ratios[J]. WATER RESEARCH,2016.
APA	Zhang, Yan,Ji, Guodong,&Wang, Rongjing.(2016).Drivers of nitrous oxide accumulation in denitrification biofilters with low carbon:nitrogen ratios.WATER RESEARCH.
MLA	Zhang, Yan,et al."Drivers of nitrous oxide accumulation in denitrification biofilters with low carbon:nitrogen ratios".WATER RESEARCH (2016).