The study on biodegradation of methylene urea by activated sludge

doi:10.1016/j.polymdegradstab.2016.03.013

	The study on biodegradation of methylene urea by activated sludge
	Yang, Zhihai 1,2,3; Shi, Yuanliang 1; Sun, Yuhuan 3; Wang, Lingli 1; Guan, Feng 3
刊名	POLYMER DEGRADATION AND STABILITY
	2016-06-01
卷号	128 页码:107-114
关键词	Methylene Urea N-(N-butyl)Thiophosphoric Triamide Biodegradation Slow-release Fertilizer Activated Sludge
ISSN号	0141-3910
DOI	10.1016/j.polymdegradstab.2016.03.013
英文摘要	Methylene urea (MU) is a kind of slow-release fertilizer. The application of MU can increase nitrogen use efficiency, reduce environmental impacts and the labor intensity of farmers. This study investigated a rapid, simple and practical way to research MU biodegradation. The activated sludge after sterilization was used as the carrier for microbial growth and the soil with the MU-degrading microorganisms was added as inoculum. By adding glucose as the carbon source and MU as the nitrogen source, after 10-15 days of aerobic training at room temperature, the activated sludge with large amounts of MU-degrading microorganisms was used as research material. The hydrolysis of the urea released from dimethylenetriurea (DMTU) degradation was inhibited by N-(n-Butyl)thiophosphoric triamide (NBPT). The results showed that the nitrogen release process of DMTU is as follows: 1) the dissolved DMTU was firstly absorbed by microorganisms and then decomposed into urea, ammonium and formaldehyde by intracellular enzyme; 2) the urea and the ammonium nitrogen from DMTU degradation were released into the environment; 3) the urea released is further hydrolyzed into ammonium and carbon dioxide by urease in the extracellular environment. Because the dissolved DMTU can be rapidly mineralized by microorganisms and the degradation rate of DMTU is a constant, the degradation rate of DMTU is independent of the concentration of reactants and determined by other factors. (C) 2016 Elsevier Ltd. All rights reserved.
WOS研究方向	Polymer Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000376786400013
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122702]
专题	中国科学院沈阳应用生态研究所
通讯作者	Yang, Zhihai; Shi, Yuanliang
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao 266000, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Yang, Zhihai,Shi, Yuanliang,Sun, Yuhuan,et al. The study on biodegradation of methylene urea by activated sludge[J]. POLYMER DEGRADATION AND STABILITY,2016,128:107-114.
APA	Yang, Zhihai,Shi, Yuanliang,Sun, Yuhuan,Wang, Lingli,&Guan, Feng.(2016).The study on biodegradation of methylene urea by activated sludge.POLYMER DEGRADATION AND STABILITY,128,107-114.
MLA	Yang, Zhihai,et al."The study on biodegradation of methylene urea by activated sludge".POLYMER DEGRADATION AND STABILITY 128(2016):107-114.