Significant N2O emission from a high rate granular reactor for completely autotrophic nitrogen removal over nitrite

doi:10.1016/j.jenvman.2020.110586

	Significant N2O emission from a high rate granular reactor for completely autotrophic nitrogen removal over nitrite
	Fang, Fang 1; Li, Hanxiang 1; Jiang, Xin 1; Deng, Xiongwen 1; Yan, Peng 1; Guo, Jinsong 1; Chen, Youpeng 1; Yang, Jixiang 1,2
刊名	JOURNAL OF ENVIRONMENTAL MANAGEMENT
	2020-07-15
卷号	266 页码:8
关键词	Nitrous oxide CANON Mathematical modeling Granular sludge Hydroxylamine oxidation
ISSN号	0301-4797
DOI	10.1016/j.jenvman.2020.110586
通讯作者	Fang, Fang(fangfangcq@cqu.edu.cn) ; Yang, Jixiang(jixiang504@hotmail.com)
英文摘要	Expanded granular sludge bed (EGSB) reactors were rarely applied for complete ammonium removal over nitrite. In this study, a high ammonium loading rate of 3677 mg N/L/d was achieved in an EGSB reactor. Approximately 5.5-8.5% of influent ammonium was converted to nitrous oxide (N2O) that is a potent greenhouse gas. Moreover, the percentage increased linearly with the increase in ammonium load. A model well matched the reactor dynamics. The model indicated that hydroxylamine (NH2OH) oxidation contributed to over 40% of produced N2O, and denitrification by ammonium oxidizing bacteria contributed to N2O emission significantly. Furthermore, the model suggests that a low oxygen concentration can result in a low N2O emission at the cost of a slightly low ammonium removal rate while influent organic matter play a minor role in reducing N2O emission. This study shows that EGSB reactors are effective in ammonium removal. In addition, the emission of N2O is significant.
资助项目	National Natural Science Foundation of China[51878091] ; National Natural Science Foundation of China[51278509] ; Youth Innovation Promotion Association[2019375] ; National Key Research and Development Program of China[2019YFD1100501]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000531083400032
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/11010]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Fang, Fang; Yang, Jixiang
作者单位	1.Chongqing Univ, Coll Environm & Ecol, 174 Shazhengjie, Chongqing 400045, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Fang, Fang,Li, Hanxiang,Jiang, Xin,et al. Significant N2O emission from a high rate granular reactor for completely autotrophic nitrogen removal over nitrite[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2020,266:8.
APA	Fang, Fang.,Li, Hanxiang.,Jiang, Xin.,Deng, Xiongwen.,Yan, Peng.,...&Yang, Jixiang.(2020).Significant N2O emission from a high rate granular reactor for completely autotrophic nitrogen removal over nitrite.JOURNAL OF ENVIRONMENTAL MANAGEMENT,266,8.
MLA	Fang, Fang,et al."Significant N2O emission from a high rate granular reactor for completely autotrophic nitrogen removal over nitrite".JOURNAL OF ENVIRONMENTAL MANAGEMENT 266(2020):8.