scholarly journals Formation and release behavior of iron corrosion products under the influence of bacterial communities in a simulated water distribution system

2014 ◽  
Vol 16 (3) ◽  
pp. 576 ◽  
Author(s):  
Huifang Sun ◽  
Baoyou Shi ◽  
Darren A. Lytle ◽  
Yaohui Bai ◽  
Dongsheng Wang
Keyword(s):  
Distribution System ◽  
Bacterial Communities ◽  
Water Distribution ◽  
Water Distribution System ◽  
Corrosion Products ◽  
Release Behavior ◽  
Iron Corrosion

scholarly journals The Interaction between the Bulking Water and Pipe Surface and Their Correlations in Water Distribution System

2018 ◽  
Vol 7 (2) ◽  
pp. 83
Author(s):  
Ruilian Li ◽  
Ming-qing Feng ◽  
Xiao-hui Bai
Keyword(s):  
Water Quality ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Tap Water ◽  
Close Relation ◽  
Quality Parameters ◽  
Iron Corrosion ◽  
Pipe Surface ◽  
Pipe Water

The pipelines corrosion can result discolor and particle increase in tap water and the complaints from the consumers. It also has the economic and hydraulic impacts for the replacement of broken pipes and fouling of corroded pipes. This paper aimed to investigate the effect of processed drinking water on metal pipe corrosion in water distribution system and the relations between the bulking water quality and pipe corrosion. It was found that there is a close relation between iron corrosion and water quality parameters in water distribution pipelines. It was shown that lower pH and alkalinity can increase the corrosion rate, while higher chlorides and sulfate may cause pitting corrosion. DOC in pipe water would be beneficial for microbial induced corrosion.

scholarly journals Mapping Dynamics of Bacterial Communities in a Full-Scale Drinking Water Distribution System Using Flow Cytometry

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2137 ◽  
Author(s):  
Caroline Schleich ◽  
Sandy Chan ◽  
Kristjan Pullerits ◽  
Michael D. Besmer ◽  
Catherine J. Paul ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Drinking Water ◽  
Distribution System ◽  
Bacterial Communities ◽  
Water Distribution ◽  
Water Distribution System ◽  
Time Correlation ◽  
Drinking Water Distribution System ◽  
Cell Counts ◽  
Drinking Water Distribution

Microbial monitoring of drinking water is required to guarantee high quality water and to mitigate health hazards. Flow cytometry (FCM) is a fast and robust method that determines bacterial concentrations in liquids. In this study, FCM was applied to monitor the dynamics of the bacterial communities over one year in a full-scale drinking water distribution system (DWDS), following implementation of ultrafiltration (UF) combined with coagulation at the drinking water treatment plant (DWTP). Correlations between the environmental conditions in the DWDS and microbial regrowth were observed, including increases in total cell counts with increasing retention time (correlation coefficient R = 0.89) and increasing water temperature (up to 5.24-fold increase in cell counts during summer). Temporal and spatial biofilm dynamics affecting the water within the DWDS were also observed, such as changes in the percentage of high nucleic acid bacteria with increasing retention time (correlation coefficient R = −0.79). FCM baselines were defined for specific areas in the DWDS to support future management strategies in this DWDS, including a gradual reduction of chloramine.

scholarly journals Biofilm bacterial communities and abundance in a full-scale drinking water distribution system in Shanghai

2010 ◽  
Vol 8 (3) ◽  
pp. 593-600 ◽  
Author(s):  
Xiaohui Bai ◽  
Fan Wu ◽  
Binhui Zhou ◽  
Xinghua Zhi
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Bacterial Communities ◽  
Water Distribution ◽  
Water Distribution System ◽  
Full Scale ◽  
Community Diversity ◽  
Plate Count ◽  
Drinking Water Distribution System ◽  
Drinking Water Distribution

Community diversity and abundance of biofilms from a full-scale drinking water distribution system in Shanghai were characterized by denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA sequences and heterotrophic plate count (HPC), respectively. Bacteria affiliated to the Beta- and Gamma-Proteobacteria were dominating in both in-situ and HPC-culturable bacterial communities. Other bacteria present included members of Alphaproteobacteria, Bacteroides, Actinobacteria, Nitrospirae and Firmicutes. Acidovorax, Ralstonia and Acinetobacter were common species in biofilms. Klebsiella pneumoniae and Enterobacter sp. were detected in the local distribution system. Dissolved organic carbon (DOC), residual disinfectant and temperature were the most important factors influencing both bacterial abundance and composition. HPC for biofilm sample was not correlated with its community diversity.

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