Biofilm and planktonic bacterial communities in a drinking water distribution system supplied with untreated groundwater
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ORIGINAL PAPER
Biofilm and planktonic bacterial communities in a drinking water distribution system supplied with untreated groundwater Jianfei Chen1 · Ningning Li1 · Shuguang Xie1 · Chao Chen2 Received: 23 March 2018 / Revised: 19 June 2018 / Accepted: 22 June 2018 © Springer-Verlag GmbH Germany, part of Springer Nature 2018
Abstract It is known that both disinfection and water quality can influence the bacterial communities in a drinking water distribution system (DWDS). Here, we hypothesized that bacterial communities in a DWDS with untreated groundwater with no prior purification and disinfection might differ from those in a DWDS with disinfected surface water. The present study applied Illumina MiSeq sequencing to investigate biofilm and planktonic bacterial communities in a DWDS fed with untreated groundwater (receiving no prior purification and disinfection). Considerable differences in bacterial richness (Chao1 richness estimator: 389–745 for water and 392–485 for biofilm), diversity (Shannon diversity index: 2.70–3.77 for water and 2.53–3.66 for biofilm) and community structure existed among both DWDS waters and biofilms. Biofilm and planktonic bacterial communities had distinct structures. The service time of DWDS could affect biofilm bacterial richness, diversity and community structure. Moreover, planktonic bacterial diversity and community structure might be influenced by N O 2− − concentration, while planktonic bacterial richness was related to NO3 concentration. Proteobacteria dominated in both biofilm and planktonic bacterial communities. Higher concentrations of NO2− favored the deltaproteobacterial proportion, but lowered the gammaproteobacterial proportion in drinking water. Overall, our study indicates that bacterial communities in a DWDS could be influenced by a variety of factors, such as habitats (water or biofilm), DWDS service time, and water chemistry. Keywords Drinking water distribution system (DWDS) · Microbial community · Nitrogen · Proteobacteria
Introduction
Communicated by Erko Stackebrandt. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00203-018-1546-7) contains supplementary material, which is available to authorized users. * Shuguang Xie [email protected] * Chao Chen [email protected] 1
State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
2
The growth of microorganisms in drinking water distribution systems (DWDSs) can have a variety of adverse effects including opportunistic pathogens’ proliferation, pipe corrosion, discoloration and nasty odour, and taste (Douterelo et al. 2013; Liu et al. 2013; Luhrig et al. 2015). In-depth knowledge on DWDS microbial community can aid in the design of effective countermeasures for drinking water safety (
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