DOI: 10.1016/j.watres.2018.06.040
Scopus记录号: 2-s2.0-85053052648
论文题名: Effects of pipe material on nitrogen transformation, microbial communities and functional genes in raw water transportation
作者: Xu H. ; Lin C. ; Chen W. ; Shen Z. ; Liu Z. ; Chen T. ; Wang Y. ; Li Y. ; Lu C. ; Luo J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 188
结束页码: 197
语种: 英语
英文关键词: Biofilm
; Functional genes
; Nitrogen pollutants transformation
; Pipe material
; Raw water transportation model system
Scopus关键词: Ammonia
; Biofilms
; Denitrification
; Effluents
; Genes
; Materials handling
; Microorganisms
; Nitrification
; Nitrogen oxides
; Nitrogen removal
; Polymerase chain reaction
; Potable water
; Regression analysis
; Steel pipe
; Urban transportation
; Water pipelines
; Water pollution
; Water supply
; Water supply systems
; Water treatment
; Dissolved organic nitrogen
; Functional genes
; Molecular-level insights
; Nitrogen transformations
; Pipe material
; Quantitative polymerase chain reaction
; Raw water
; Urban water supply system
; Nitrogen fixation
; ammonia
; biofilm
; concentration (composition)
; denitrification
; dissolved organic nitrogen
; drinking water
; effluent
; functional role
; microbial community
; nitrogen
; pipe
; polymerase chain reaction
; transformation
; China
; Taihu
英文摘要: Raw water transportation pipelines are vital in an urban water supply system for transporting raw water to drinking water treatment plants. This study investigated the effects of pipe material on nitrogen transformation, microbial communities and characteristics of related function genes in paint-lined steel pipe (PLSP) and cement-lined steel pipe (CLSP) raw water model systems. We established quantitative relationships between specific functional genes and change rates of nitrogen pollutants, which were verified by field investigation on nitrogen pollutant transformations in real raw water transportation systems. The results showed that the CLSP produced higher ammonia nitrogen (NH4 +-N) transformation rates and higher effluent concentrations of nitrate nitrogen (NO3 −-N) and dissolved organic nitrogen (DON) than the PLSP. Both pipes achieved high and stable nitrite nitrogen (NO2 −-N) and low total nitrogen (TN) removal efficiency. Nitrification was found to be the dominant process in both model systems, especially in the CLSP. Characteristics of microbial communities and nitrogen functional genes, which were analysed by high-throughput pyrosequencing and quantitative polymerase chain reaction (qPCR), respectively, varied between the two pipe systems. Nitrogen transformation pathways, identified by path analysis, were also different between the PLSP and CLSP due to different microbial community characteristics and synergistic effects of nitrogen functional genes. In the CLSP, (NH4 +-N→NO2 −-N) with part denitrification, was the primary transformation pathway of ammonia nitrogen (NH4 +-N), while only ammonia oxidization contributed to NH4 +-N transformation in the PLSP. (NO2 −-N→NO3 −-N) was the main pathway involved in NO2 −-N transformation and NO3 −-N accumulation. The TN removal showed complex relationships with nitrification, denitrification and nitrogen fixation processes. These findings provided molecular-level insights into nitrogen pollutant transformations during the transportation of raw water through different types of pipes and technical support for the selection of raw water pipe materials. In our study area, the Taihu basin, China, PLSP was better than CLSP for distributing raw water in a short transportation distance, due to the lower effluent concentrations of DON and NO3 −-N and less abundance of microorganisms. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112599
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1 Xikang Road, Nanjing, 210098, China; Ningbo Water Supply Co., Ltd, No.348 Xinhe Road, Ningbo, 315041, China; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, United States
Recommended Citation:
Xu H.,Lin C.,Chen W.,et al. Effects of pipe material on nitrogen transformation, microbial communities and functional genes in raw water transportation[J]. Water Research,2018-01-01,143