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首页> 外文期刊>Environmental Science & Technology >Spatial and Temporal Variation in De Facto Wastewater Reuse in Drinking Water Systems across the U.S.A.
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Spatial and Temporal Variation in De Facto Wastewater Reuse in Drinking Water Systems across the U.S.A.

机译：美国整个饮用水系统中事实上废水回用的时空变化

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摘要

De facto potable reuse occurs when treated wastewater is discharged into surface waters upstream of potable drinking water treatment plant (DWTP) intakes. Wastewater treatment plant (WWTP) discharges may pose water quality risks at the downstream DWTP, but additional flow aids in providing a reliable water supply source. In this work de facto reuse is analyzed for 2056 surface water intakes serving 1210 DWTPs across the U.SA that serve greater than 10 000 people, covering approximately 82% of the nation's population. An ArcGIS model is developed to assess spatial relationships between DWTPs and WWTPs, with a python script designed to perform a network analysis by hydrologic region. A high frequency of de facto reuse occurrence was observed; 50% of the DWTP intakes are potentially impacted by upstream WWTP discharges. However, the magnitude of de facto reuse was seen to be relatively low, where 50% of the impacted intakes contained less than 1% treated municipal wastewater under average streamflow conditions. De facto reuse increased greatly under low streamflow conditions (modeled by Q95), with 32 of the 80 sites yielding at least 50% treated wastewater, this portion of the analysis is limited to sites where stream gauge data was readily available.
机译：当将经处理的废水排放到饮用水处理厂（DWTP）进水口的地表水中时，实际上会发生饮用水再利用。废水处理厂（WWTP）的排放物可能对下游DWTP造成水质风险，但是额外的流量有助于提供可靠的水源。在这项工作中，分析了事实上的再利用情况，分析了2056个地表水取水量，这些水量为全美12万个污水处理厂提供服务，这些污水处理厂服务于10000多人，约占美国总人口的82％。开发了ArcGIS模型以评估DWTP和WWTP之间的空间关系，并设计了一个python脚本，用于按水文区域执行网络分析。观察到事实上的重用发生率很高； 50％的DWTP摄入量可能受到上游WWTP排放量的影响。但是，事实上再利用的程度相对较低，在平均水流条件下，受影响的进水口中有50％的污水处理量不到1％。实际上，在低流量条件下（由Q95建模）重用率大大提高，在80个站点中有32个站点产生了至少50％的处理后废水，这部分分析仅限于容易获得流量表数据的站点。

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  • 来源
    《Environmental Science & Technology》 |2015年第2期|982-989|共8页
  • 作者

    Jacelyn Rice; Paul Westerhoff;

  • 作者单位

    School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-5306, United States;

    School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona 85287-5306, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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