NIUJia,HUANGYi-ting,XUWei,et al.Comparison of Microbial Communities in Different Manners of Tap Water Supply as Affected by Water Stagnation[J].China Water & Wastewater,2022,38(5):14-23.
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Comparison of Microbial Communities in Different Manners of Tap Water Supply as Affected by Water Stagnation

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第5期 Page: 14-23 Column: Date of publication: 2022-03-01
Author(s):
NIU　Jia1;  HUANG　Yi-ting1;  XU　Wei1;  GONG　Long-cong2;  WU　Ling-jie1;  CHEN　Shu-ting1;  SHI　Ting1;  CHEN　Xiao-chen3
（1. Center of Safe and Energy?saving Engineering Technology for Urban Water Supply and Drainage System， School of Ecological Environment and Urban Construction， Fujian University of Technology， Fuzhou 350118， China； 2. Fuzhou Water Supply Company， Fuzhou 350001， China； 3. Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology， College of Environment and Resources， Fuzhou University， Fuzhou 350108， China）
Keywords:
drinking water quality;  water supply manner;  water stagnation;  biological stability;  bacterial community structure;  archaeal community structure;  high?throughput sequencing
Abstract:
An in situ study was carried out in order to investigate the problem of biological stability of tap water caused by water stagnation. Tap water from three types of water supply manner were selected, i.e. the centralized water supply, secondary water supply and water filter. High-throughput sequencing was applied to investigate and compare the changes of microbial community structures in the tap water caused by water stagnation. The results showed that Pseudomonas was the dominant genus of bacteria community after stagnation in all the three water supply manners. Meanwhile, some opportunistic pathogens, such as Parachlamydia, Legionella and Mycobacterium were detected. Among them, tap water of secondary water supply system showed the lowest species richness and highest biodiversity. Besides, the bacterial community structure in the tap water of secondary water supply system was different from those in the other two water supply manners. As for archaea, before stagnation, water from the centralized water supply system was dominated by Halalkalicoccus. However, water from secondary water supply was dominated by unclassified genus. And tap water after filter was dominated by Methanomethylovorans. After stagnation, archaeal community structure changed only in the tap water of the centralized water supply and filter effluent. And both of them were dominated by methanogens. On the other hand, tap water of the secondary water supply system was dominated by ammonia?oxidizing archaea. The outcome of this study is bound to enrich the scientific knowledge of microbial information in the tap water. It will provide the first?hand information and references for solving the problems of biological safety and assessing the health risk of drinking water stagnation.
Last Update: 2022-03-01