Systematic recovery of building plumbing-associated microbial communities after extended periods of altered water demand during the COVID-19 pandemic.
Systematic recovery of building plumbing-associated microbial communities after extended periods of altered water demand during the COVID-19 pandemic.
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在 COVID-19 大流行期间需水量长期变化后，系统性地恢复与管道相关的微生物群落。
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
A. Pinto
中科院分区：
文献类型：
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作者：
S. Vosloo;L. Huo;U. Chauhan;I. Cotto;B. Gincley;K. Vilardi;B. Yoon;K. Pieper;A. Stubbins;A. Pinto
与新型冠状病毒疫情（COVID-19）相关的楼宇关闭导致商业楼宇管道系统的水停滞增加，加剧了对重新开放后饮用水微生物安全的担忧。由于前所未有的大规模建筑物关闭，目前尚不清楚长期减少用水需求对水质的确切影响。我们在六个月的时间里分析了420个自来水样本，从分阶段重新开放的那个月开始（即，于二零二零年六月三十日（即二零二零年六月三十日），来自三幢因COVID-19社交距离政策而导致容量减少的商业楼宇的地盘及四个已占用的住宅住户。直接和衍生的流式细胞仪测量沿着与水化学表征被用来评估管道相关的微生物群落的变化与长期的改变水的需求。我们的研究结果表明，长时间的建筑物关闭影响了商业建筑中的微生物群落，如微生物细胞计数的增加所示，其中包括更大比例的高核酸细胞。虽然冲洗减少了细胞计数和增加消毒残留物，但商业建筑中的微生物群落组成与住宅住户中的微生物群落组成仍然不同。尽管如此，重新开放后的水需求增加，在几个月的时间里加强了系统的恢复，因为商业建筑中的微生物群落指纹与居民家庭中的微生物群落指纹相融合。总体而言，我们的研究结果表明，与短期冲洗相比，在长时间改变水需求导致流量减少后，水需求的持续和逐步增加可能在建筑管道相关微生物群落的恢复中发挥更重要的作用。
Building closures related to the coronavirus disease (COVID-19) pandemic resulted in increased water stagnation in commercial building plumbing systems that heightened concerns related to the microbiological safety of drinking water post re-opening. The exact impact of extended periods of reduced water demand on water quality is currently unknown due to the unprecedented nature of widespread building closures. We analyzed 420 tap water samples over a period of six months, starting the month of phased reopening (i.e., June 2020), from sites at three commercial buildings that were subjected to reduced capacity due to COVID-19 social distancing policies and four occupied residential households. Direct and derived flow cytometric measures along with water chemistry characterization were used to evaluate changes in plumbing-associated microbial communities with extended periods of altered water demand. Our results indicate that prolonged building closures impacted microbial communities in commercial buildings as indicated by increases in microbial cell counts, encompassing greater proportion cells with high nucleic acids. While flushing reduced cell counts and increased disinfection residuals, the microbial community composition in commercial buildings were still distinct from those at residential households. Nonetheless, increased water demand post-reopening enhanced systematic recovery over a period of months, as microbial community fingerprints in commercial buildings converged with those in residential households. Overall, our findings suggest that sustained and gradual increases in water demand may play a more important role in the recovery of building plumbing-associated microbial communities as compared to short-term flushing, after extended periods of altered water demand that result in reduced flow volumes.
COVID-19 大流行期间人与基础设施的相互作用：了解建筑层面的水和电力需求概况
DOI：
10.1021/acsestwater.1c00176
发表时间：
2021
期刊：
ACS ES&T Water
影响因子：
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作者：
Spearing, Lauryn A.;Tiedmann, Helena R.;Sela, Lina;Nagy, Zoltan;Kaminsky, Jessica A.;Katz, Lynn E.;Kinney, Kerry A.;Kirisits, Mary Jo;Faust, Kasey M.
通讯作者：
Faust, Kasey M.
社交距离政策对饮用水基础设施的影响：COVID-19 大流行期间美国公用事业公司面临的挑战和应对措施概述
DOI：
10.1021/acsestwater.0c00229
发表时间：
2021
期刊：
ACS ES&T Water
影响因子：
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作者：
Spearing, Lauryn A.;Thelemaque, Nathalie;Kaminsky, Jessica A.;Katz, Lynn E.;Kinney, Kerry A.;Kirisits, Mary Jo;Sela, Lina;Faust, Kasey M.
通讯作者：
Faust, Kasey M.