Characteristics of N2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 水污染控制实验室

	Characteristics of N2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations
	Yan, Xu ; Zheng, Shikan ; Qiu, Dezhi ; Yang, Jie ; Han, Yunping ; Huo, Zhaoman ; Su, Xianfa ; Sun, Jianhui
刊名	BIORESOURCE TECHNOLOGY
	2019-11-01
卷号	291 页码:-
关键词	Nitrous oxide Activated sludge flocs Micro-environment Microelectrode Microbial community
ISSN号	0960-8524
英文摘要	Nitrous oxide (N2O) is a strong greenhouse gas that is produced in significant quantities through biological nitrogen removal processes in wastewater treatment plants; however, N2O generation within the internal micro-environment of activated sludge flocs (ASFs) is poorly understood. In this study, microelectrodes and molecular techniques were employed to investigate the concentrations of N2O and other chemicals and the composition and distribution of microbes within ASFs, respectively. The results showed that N2O generation was correlated with the ASF micro-environment, and was significantly influenced by the dissolved oxygen (DO) concentration of the bulk wastewater. Equal N2O, DO, NH4+-N, and NO3--N concentrations were found in small flocs (< 100 mu m). By contrast, higher N2O generation rates and lower DO, NH4+-N, and NO3--N concentrations were detected in the center of large flocs (> 200 mu m) compared with those at their surfaces. Microbial structures of varying particle sizes were distinct and depended on the micro-environmental characteristics.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43225]
专题	生态环境研究中心_水污染控制实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Henan Key Lab Environm Pollut Control,Minist Educ, Xinxiang 453007, Henan, Peoples R China
推荐引用方式 GB/T 7714	Yan, Xu,Zheng, Shikan,Qiu, Dezhi,et al. Characteristics of N2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations[J]. BIORESOURCE TECHNOLOGY,2019,291:-.
APA	Yan, Xu.,Zheng, Shikan.,Qiu, Dezhi.,Yang, Jie.,Han, Yunping.,...&Sun, Jianhui.(2019).Characteristics of N2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations.BIORESOURCE TECHNOLOGY,291,-.
MLA	Yan, Xu,et al."Characteristics of N2O generation within the internal micro-environment of activated sludge flocs under different dissolved oxygen concentrations".BIORESOURCE TECHNOLOGY 291(2019):-.