Microbial Communities Shaped by Treatment Processes in a Drinking Water Treatment Plant and Their Contribution and Threat to Drinking Water Safety
| العنوان: | Microbial Communities Shaped by Treatment Processes in a Drinking Water Treatment Plant and Their Contribution and Threat to Drinking Water Safety |
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| المؤلفون: | Liumo Ren, Shuili Yu, Qing Xia, Minmin Liu, Lei Li, Qi Li, Zhengyang Gu, Guicai Liu, Zhiyuan Liu, Yubing Ye |
| المصدر: | Frontiers in Microbiology Frontiers in Microbiology, Vol 8 (2017) |
| بيانات النشر: | Frontiers Media S.A., 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | 0301 basic medicine, Microbiology (medical), function prediction, lcsh:QR1-502, Portable water purification, 010501 environmental sciences, 01 natural sciences, Microbiology, lcsh:Microbiology, 03 medical and health sciences, Food science, Effluent, 0105 earth and related environmental sciences, Original Research, Total organic carbon, chlorine resistant bacterial populations, biology, aquatic pathogens, Chemistry, Illumina MiSeq sequencing, Bacteria Present, biology.organism_classification, 030104 developmental biology, Microbial population biology, drinking water treatment processes, Water treatment, Proteobacteria, microbial community, Bacteria |
| الوصف: | Bacteria play an important role in water purification in drinking water treatment systems. On one hand, bacteria present in the untreated water may help in its purification through biodegradation of the contaminants. On the other hand, some bacteria may be human pathogens and pose a threat to consumers. The present study investigated bacterial communities using Illumina MiSeq sequencing of 16S rRNA genes and their functions were predicted using PICRUSt in a treatment system, including the biofilms on sand filters and biological activated carbon (BAC) filters, in 4 months. In addition, quantitative analyses of specific bacterial populations were performed by real-time quantitative polymerase chain reaction (qPCR). The bacterial community composition of post-ozonation effluent, BAC effluent and disinfected water varied with sampling time. However, the bacterial community structures at other treatment steps were relatively stable, despite great variations of source water quality, resulting in stable treatment performance. Illumina MiSeq sequencing illustrated that Proteobacteria was dominant bacterial phylum. Chlorine disinfection significantly influenced the microbial community structure, while other treatment processes were synergetic. Bacterial communities in water and biofilms were distinct, and distinctions of bacterial communities also existed between different biofilms. By contrast, the functional composition of biofilms on different filters were similar. Some functional genes related to pollutant degradation were found widely distributed throughout the treatment processes. The distributions of Mycobacterium spp. and Legionella spp. in water and biofilms were revealed by real-time quantitative polymerase chain reaction (qPCR). Most bacteria, including potential pathogens, could be effectively removed by chlorine disinfection. However, some bacteria presented great resistance to chlorine. qPCRs showed that Mycobacterium spp. could not be effectively removed by chlorine. These resistant bacteria and, especially potential pathogens should receive more attention. Redundancy analysis (RDA) showed that turbidity, ammonia nitrogen and total organic carbon (TOC) exerted significant effects on community profiles. Overall, this study provides insight into variations of microbial communities in the treatment processes and aids the optimization of drinking water treatment plant design and operation for public health. |
| اللغة: | English |
| تدمد: | 1664-302X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fa4e22c72202eaefe188e93397b644a http://europepmc.org/articles/PMC5733044 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....9fa4e22c72202eaefe188e93397b644a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1664302X |
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