DOI: 10.1016/j.watres.2018.09.014
Scopus记录号: 2-s2.0-85053812957
论文题名: The role of influent organic carbon-to-nitrogen (COD/N) ratio in removal rates and shaping microbial ecology in soil aquifer treatment (SAT)
作者: Friedman L. ; Mamane H. ; Avisar D. ; Chandran K.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 146 起始页码: 197
结束页码: 205
语种: 英语
英文关键词: Biofilm
; Comammox
; Denitrification
; Nitrification
; Soil aquifer treatment
英文摘要: Soil columns simulating soil aquifer treatment (SAT), fed with synthetic secondary effluent by intermittent infiltration of flooding/drying cycles, were characterized for nitrogen and organic carbon removal, and microbial ecology and biokinetics. The columns differed in the concentration ratio of chemical oxygen demand (COD) to the summed NH4 +, NO2 − and organic nitrogen—2 (C/N2) or 5 (C/N5). Chemical profiles along the column demonstrated a preference for COD oxidation over nitrification and coupled denitrification, with higher nitrogen loss (57% vs. 16%) in the C/N5 column. Unexpectedly, significant dominance of the genus Nitrospira over the genus Nitrobacter and ammonia-oxidizing bacteria (AOB) was strongly correlated at column depths where NH4 + removal occurred. Moreover, the Nitrospira profile had the strongest correlation to the profile of NH4 + (positive) and NO3 − (negative), strongly indicating complete ammonia oxidation. 16S sequencing analysis of the topsoil in C/N2 vs. C/N5 columns revealed double the abundance of microbial aerobic potential (64% vs. 32%) vs. one-third the denitrification potential (13% vs. 31%). The concentrations and degradability levels of organic carbon were the most influential parameters shaping community structure. Niche differentiation within the biofilm attached to the soil is suggested to have an important role in the process's anoxic activity and nitrogen removal. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112384
Appears in Collections: 气候减缓与适应
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作者单位: School of Mechanical Engineering, Environmental Engineering Program, Tel Aviv University, Tel Aviv, 69978, Israel; School of Earth Sciences, The Water Research Center, Tel Aviv University, Hydrochemistry, Tel Aviv, 69978, Israel; Department of Earth and Environmental Engineering, Columbia University in the City of New York, New York, NY 10027, United States
Recommended Citation:
Friedman L.,Mamane H.,Avisar D.,et al. The role of influent organic carbon-to-nitrogen (COD/N) ratio in removal rates and shaping microbial ecology in soil aquifer treatment (SAT)[J]. Water Research,2018-01-01,146