DOI: 10.1016/j.watres.2018.02.006
Scopus记录号: 2-s2.0-85041826200
论文题名: Identifying the underlying causes of biological instability in a full-scale drinking water supply system
作者: Nescerecka A. ; Juhna T. ; Hammes F.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 135 起始页码: 11
结束页码: 21
语种: 英语
英文关键词: Biological stability
; Drinking water distribution system
; Drinking water monitoring
; Flow cytometry
; Nutrients
Scopus关键词: Bacteria
; Chlorination
; Flow cytometry
; Groundwater
; Location
; Mixer circuits
; Nutrients
; Organic carbon
; Phosphorus
; Stability
; Surface waters
; Temperature
; Water distribution systems
; Water supply
; Water treatment
; Biological instability
; Biological stability
; Disinfection residuals
; Growth-limiting nutrients
; Microbiological quality
; Seasonal fluctuations
; Temperature dependent
; Water monitoring
; Potable water
; carbon
; chlorine
; drinking water
; ground water
; iron
; nitrogen
; organic carbon
; phosphorus
; surface water
; carbon
; chlorine
; drinking water
; nitrogen
; phosphorus
; bacterium
; biological method
; cell
; chlorination
; disinfection
; distribution system
; drinking water
; flow cytometry
; identification method
; nutrient dynamics
; organic carbon
; phosphorus
; surface water
; water supply
; water treatment plant
; Article
; bacterial growth
; chlorination
; flow cytometry
; priority journal
; water supply
; water temperature
; water treatment
; bacterium
; chemistry
; disinfection
; growth, development and aging
; halogenation
; Latvia
; microbiology
; procedures
; season
; water management
; water quality
; water supply
; Bacteria (microorganisms)
; Bacteria
; Carbon
; Chlorine
; Disinfection
; Drinking Water
; Flow Cytometry
; Groundwater
; Halogenation
; Latvia
; Nitrogen
; Phosphorus
; Seasons
; Water Microbiology
; Water Purification
; Water Quality
; Water Supply
英文摘要: Changes in bacterial concentration and composition in drinking water during distribution are often attributed to biological (in)stability. Here we assessed temporal biological stability in a full-scale distribution network (DN) supplied with different types of source water: treated and chlorinated surface water and chlorinated groundwater produced at three water treatment plants (WTP). Monitoring was performed weekly during 12 months in two locations in the DN. Flow cytometric total and intact cell concentration (ICC) measurements showed considerable seasonal fluctuations, which were different for two locations. ICC varied between 0.1–3.75 × 105 cells mL−1 and 0.69–4.37 × 105 cells mL−1 at two locations respectively, with ICC increases attributed to temperature-dependent bacterial growth during distribution. Chlorinated water from the different WTP was further analysed with a modified growth potential method, identifying primary and secondary growth limiting compounds. It was observed that bacterial growth in the surface water sample after chlorination was primarily inhibited by phosphorus limitation and secondly by organic carbon limitation, while carbon was limiting in the chlorinated groundwater samples. However, the ratio of available nutrients changed during distribution, and together with disinfection residual decay, this resulted in higher bacterial growth potential detected in the DN than at the WTP. In this study, bacterial growth was found to be higher (i) at higher water temperatures, (ii) in samples with lower chlorine residuals and (iii) in samples with less nutrient (carbon, phosphorus, nitrogen, iron) limitation, while this was significantly different between the samples of different origin. Thus drinking water microbiological quality and biological stability could change during different seasons, and the extent of these changes depends on water temperature, the water source and treatment. Furthermore, differences in primary growth limiting nutrients in different water sources could contribute to biological instability in the network, where mixing occurs. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112867
Appears in Collections: 气候减缓与适应
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作者单位: Riga Technical University, Kipsalas str. 6A, Riga, LV-1048, Latvia; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, Dübendorf, CH-8600, Switzerland
Recommended Citation:
Nescerecka A.,Juhna T.,Hammes F.. Identifying the underlying causes of biological instability in a full-scale drinking water supply system[J]. Water Research,2018-01-01,135