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Background Antibiotic Resistance and Microbial Communities Dominate Effects of Advanced Purified Water Recharge to an Urban Aquifer
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2019-09-23 , DOI: 10.1021/acs.estlett.9b00521 Moustapha Harb 1, 2 , Phillip Wang 1 , Ali Zarei-Baygi 1 , Megan H. Plumlee 3 , Adam L. Smith 1
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2019-09-23 , DOI: 10.1021/acs.estlett.9b00521 Moustapha Harb 1, 2 , Phillip Wang 1 , Ali Zarei-Baygi 1 , Megan H. Plumlee 3 , Adam L. Smith 1
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The growing need for potable reuse of wastewater has led to significant development and implementation of advanced treatment processes. However, the emergence of new safety concerns (e.g., antibiotic resistance) necessitates an ongoing evaluation of current and future reuse schemes to demonstrate both water security and public safety. This study elucidates the microbial community and antibiotic resistance gene (ARG) profiles of a 100 million gallon per day (MGD) advanced water treatment facility (AWTF). A concurrent evaluation of the groundwater aquifer that is recharged with AWTF product water was also performed to determine the fate of specific microbial targets in the downstream environment. Results indicated that the AWTF reduced nearly all targeted ARGs to below detection limits (<50 copies/L). In groundwater samples, however, a ubiquitous presence of ARGs conferring resistance to sulfonamides (sul1 and sul2) and β-lactams (oxa-1) was observed (104–106 copies/L) in both AWTF-recharged locations and control locations. Microbial community analysis via 16S rRNA gene sequencing further showed that the AWTF treatment train effectively excluded any upstream wastewater microbial community characteristics from the product water. Groundwater receiving AWTF recharge through percolation basins was greatly influenced by its proximity to a river that is known to receive conventional wastewater treatment plant effluents.
中文翻译：
背景抗生素抗性和微生物群落对城市含水层高级纯净水补给的影响起主导作用。
对饮用水的可再利用的日益增长的需求导致了先进处理工艺的显着发展和实施。但是，由于出现新的安全问题（例如，抗生素抗性），因此有必要对当前和将来的再利用计划进行持续评估，以证明水安全和公共安全。这项研究阐明了每天1亿加仑（MGD）先进水处理设施（AWTF）的微生物群落和抗生素抗性基因（ARG）概况。同时对补充了AWTF产品水的地下水含水层进行了评估，以确定下游环境中特定微生物目标的命运。结果表明，AWTF将几乎所有目标ARG降低到检测限以下（<50拷贝/ L）。但是，在地下水样品中，在AWTF充电位置和对照位置均观察到了sul1和ul2和β-内酰胺（oxa-1）（10 4 –10 6拷贝/ L）。通过16S rRNA基因测序进行的微生物群落分析进一步表明，AWTF处理流程有效地从产品水中排除了任何上游废水微生物群落特征。通过渗滤池接受AWTF补给的地下水受其靠近一条河流的影响，该河流已知会接收常规废水处理厂的废水。
更新日期：2019-09-23
中文翻译：
背景抗生素抗性和微生物群落对城市含水层高级纯净水补给的影响起主导作用。
对饮用水的可再利用的日益增长的需求导致了先进处理工艺的显着发展和实施。但是，由于出现新的安全问题（例如，抗生素抗性），因此有必要对当前和将来的再利用计划进行持续评估，以证明水安全和公共安全。这项研究阐明了每天1亿加仑（MGD）先进水处理设施（AWTF）的微生物群落和抗生素抗性基因（ARG）概况。同时对补充了AWTF产品水的地下水含水层进行了评估，以确定下游环境中特定微生物目标的命运。结果表明，AWTF将几乎所有目标ARG降低到检测限以下（<50拷贝/ L）。但是，在地下水样品中，在AWTF充电位置和对照位置均观察到了sul1和ul2和β-内酰胺（oxa-1）（10 4 –10 6拷贝/ L）。通过16S rRNA基因测序进行的微生物群落分析进一步表明，AWTF处理流程有效地从产品水中排除了任何上游废水微生物群落特征。通过渗滤池接受AWTF补给的地下水受其靠近一条河流的影响，该河流已知会接收常规废水处理厂的废水。
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