DOI: 10.1016/j.watres.2018.10.064
Scopus记录号: 2-s2.0-85056158247
论文题名: Stratification of nitrifier guilds in granular sludge in relation to nitritation
作者: Soler-Jofra A. ; Wang R. ; Kleerebezem R. ; van Loosdrecht M.C.M. ; Pérez J.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 479
结束页码: 491
语种: 英语
英文关键词: Biofilm
; Nitrate-oxidizing bacteria repression
; Partial nitrification
; Residual ammonium concentration
; Temperature
Scopus关键词: Biofilms
; Dissolved oxygen
; Granular materials
; Nitrates
; Temperature
; Ammonium concentrations
; Experimental methodology
; Nitrate concentration
; Nitrate production
; Nitrite oxidations
; Partial nitrification
; Partial nitritation
; Process performance
; Nitrification
; ammonia
; dissolved oxygen
; nitrate
; nitrite
; biofilm
; concentration (composition)
; experimental study
; guild
; instrumentation
; nitrification
; oxidation
; sludge
; stratification
; temperature effect
; testing method
; ammonia oxidizing bacterium
; Article
; biofilm
; effluent
; kinetics
; mathematical model
; nitrification
; nonhuman
; priority journal
; sludge
; stoichiometry
; temperature
; waste water
英文摘要: A lab-scale partial nitritation granular sludge air-lift reactor was operated in continuous mode treating low strength synthetic medium (influent ca. 50 mg-N-NH4 +/L). Granules were initially stratified with AOB in the external shell and NOB in the inner core at 20 °C. Once temperature was decreased progressively from 20 °C to 15 °C, nitrate production was initially observed during several weeks. However, by maintaining relatively high ammonium concentrations in the liquid (ca. 28 mg-N-NH4 +/L), effluent nitrate concentrations in the reactor decreased in time and process performance was recovered. Batch tests were performed in the reactor at different conditions. To understand the experimental results an existing one-dimensional biofilm model was used to simulate batch tests and theoretically assess the impact of stratification, dissolved oxygen (DO) and short-term effects of temperature on time course concentrations of ammonium, nitrite and nitrate. This theoretical assessment served to develop an experimental methodology for the evaluation of in-situ batch tests in the partial nitritation reactor. These batch tests proved to be a powerful tool to easily monitor the extent of stratification of nitrifier guilds in granular sludge and to determine the required bulk ammonium concentration to minimize nitrite oxidation. When nitrifier guilds were stratified in the granular sludge, a higher bulk ammonium concentration was required to efficiently repress NOB at lower temperature (ca. 19 versus 7 mg-N-NH4 +/L at 15 and 20 °C, respectively). © 2018 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122186
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, Delft, HZ 2629, Netherlands; Department of Environment Engineering, College of Environmental & Resource Science, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China; Department of Chemical, Biological and Environmental Engineering, Universitat Autonoma de Barcelona, Cerdanyola del Valles, 08193, Spain
Recommended Citation:
Soler-Jofra A.,Wang R.,Kleerebezem R.,et al. Stratification of nitrifier guilds in granular sludge in relation to nitritation[J]. Water Research,2019-01-01