高层建筑二次供水中自来水微生物群的变化

IF 14 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Science and Ecotechnology Pub Date : 2024-03-16 DOI:10.1016/j.ese.2024.100413
Manjie Li , Zhaowei Liu , Yongcan Chen
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引用次数: 0

摘要

在高层建筑中,二次供水系统(SWSS)起着举足轻重的作用,但由于水流时断时续、消毒剂残留量低、管道表面积大等原因,为微生物的繁殖提供了有利环境,从而引发了对自来水水质恶化的担忧。尽管自来水厂无处不在,但人们对自来水厂内细菌群落动态的全面了解仍很渺茫。在这里,我们展示了自来水厂固有变量如何在远端关键地塑造自来水微生物群落。在办公室环境中,与住宅区不同,管道材料的多样性促使细菌群落发生了明显的变化,例如从α-蛋白杆菌占优势转变为γ-蛋白杆菌占优势,同时细菌多样性和微生物繁殖潜力也急剧上升。在自来水厂中延长水的滞留时间必然会加剧微生物的再生倾向并改变细菌群落,但二次消毒是保持水质完整性的有力策略。此外,用水的规律性会调节近端水流动态,从而影响自来水的微生物景观。从这项调查中获得的启示为设计有效的干预措施奠定了基础,这些干预措施旨在保障消费者终端的微生物标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Tap water microbiome shifts in secondary water supply for high-rise buildings

In high-rise buildings, secondary water supply systems (SWSSs) are pivotal yet provide a conducive milieu for microbial proliferation due to intermittent flow, low disinfectant residual, and high specific pipe-surface area, raising concerns about tap water quality deterioration. Despite their ubiquity, a comprehensive understanding of bacterial community dynamics within SWSSs remains elusive. Here we show how intrinsic SWSS variables critically shape the tap water microbiome at distal ends. In an office setting, distinct from residential complexes, the diversity in piping materials instigates a noticeable bacterial community shift, exemplified by a transition from α-Proteobacteria to γ-Proteobacteria dominance, alongside an upsurge in bacterial diversity and microbial propagation potential. Extended water retention within SWSSs invariably escalates microbial regrowth propensities and modulates bacterial consortia, yet secondary disinfection emerges as a robust strategy for preserving water quality integrity. Additionally, the regularity of water usage modulates proximal flow dynamics, thereby influencing tap water's microbial landscape. Insights garnered from this investigation lay the groundwork for devising effective interventions aimed at safeguarding microbiological standards at the consumer's endpoint.

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来源期刊
CiteScore
20.40
自引率
6.30%
发文量
11
审稿时长
18 days
期刊介绍: Environmental Science & Ecotechnology (ESE) is an international, open-access journal publishing original research in environmental science, engineering, ecotechnology, and related fields. Authors publishing in ESE can immediately, permanently, and freely share their work. They have license options and retain copyright. Published by Elsevier, ESE is co-organized by the Chinese Society for Environmental Sciences, Harbin Institute of Technology, and the Chinese Research Academy of Environmental Sciences, under the supervision of the China Association for Science and Technology.
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