Direct evidence of microbiological water quality changes on bacterial quantity and community caused by plumbing system

作     者：Jun Li Anran Ren Ed van der Mark Gang Liu Jun Li;Anran Ren;Ed van der Mark;Gang Liu

作者机构：Key Laboratory of Drinking Water Science and TechnologyResearch Centre for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of SciencesBeijing 100049China Dunea Water CompanyPlaza of the United Nations 11-15Zoetermeer 2700 ATthe Netherlands Sanitary engineeringDepartment of Water managementFaculty of Civil Engineering and GeosciencesDelft University of TechnologyDelft 2600 GAthe Netherlands 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第6期

页      面：175-183页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：the support from the National Key R&D program of China(No.2018YFE0204100) the National Natural Science Foundation of China(No.52022103) the National Natural Science Foundation of China for International Cooperation and Exchange(No.51820105011) 

主　　题：Drinking water distribution system Plumbing system Microbiological water quality Sampling program 454 pyrosequencing 

摘      要：Drinking water quality deteriorates from treatment plant to customer taps, especially in the plumbing system. There is no direct evidence about what the differences are contributed by plumbing system. This study compared the water quality in the water main and at customer tap by preparing a sampling tap on the water main. The biomass was quantified by adenosine triphosphate(ATP) and the microbial community was profiled by 454 *** results showed that in distribution pipes, biofilm contributed 94% of the total biomass,while loose deposits showed little contribution( 2%) because of the low amount of loose deposits. The distribution of biological stable water had minor effects on the microbiocidal water quality regarding both quantity(ATP 1 ng/L vs. 1.7 ng/L) and community of the bacteria. Whereas the plumbing system has significant contribution to the increase of active biomass(1.7 ng/L vs. 2.9 ng/L) and the changes of bacterial community. The relative abundance of Sphingomonas spp. at tap(22%) was higher than that at water main(2%), while the relative abundance of Pseudomonas spp. in tap water(15%) was lower than that in the water from street water main(29%). Though only one location was prepared and studied, the present study showed that the protocol of making sampling tap on water main offered directly evidences about the impacts of plumbing system on tap water quality, which makes it possible to distinguish and study the processes in distribution system and plumbing system separately.