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Combined Sewer Overflows: An Environmental Source of Hormones and Wastewater Micropollutants

机译:下水道综合溢流:激素和废水中微污染物的环境来源

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摘要

Data were collected at a wastewater treatment plant (WWTP) in Burlington, Vermont, USA, (serving 30,000 people) to assess the relative contribution of CSO (combined sewer overflow) bypass flows and treated wastewater effluent to the load of steroid hormones and other wastewater micropollutants (WMPs) from a WWTP to a lake. Flow-weighted composite samples were collected over a 13 month period at this WWTP from CSO bypass flows or plant influent flows (n = 28) and treated effluent discharges (n = 22). Although CSO discharges represent 10% of the total annual water discharge (CSO plus treated plant effluent discharges) from the WWTP, CSO discharges contribute 40-90% of the annual load for hormones and WMPs with high (>90%) wastewater treatment removal efficiency. By contrast, compounds with low removal efficiencies (<90%) have less than 10% of annual load contributed by CSO discharges. Concentrations of estrogens, androgens, and WMPs generally are 10 times higher in CSO discharges compared to treated wastewater discharges. Compound concentrations in samples of CSO discharges generally decrease with increasing flow because of wastewater dilution by rainfall runoff. By contrast, concentrations of hormones and many WMPs in samples from treated discharges can increase with increasing flow due to decreasing removal efficiency.
机译:数据是在美国佛蒙特州伯灵顿的废水处理厂(WWTP)上收集的(可服务30,000人),以评估CSO(联合下水道溢流)旁路流量和处理后的废水对类固醇激素和其他废水的负荷的相对贡献。从污水处理厂到湖泊的微污染物(WMP)。在这个污水处理厂中,在13个月的时间内从CSO旁路流量或工厂进水流量(n = 28)和处理后的废水排放(n = 22)中收集了流量加权的复合样品。尽管CSO排放量占污水处理厂年总排放量的10%(CSO加上经过处理的工厂废水排放量),但CSO排放量占激素和WMP年度负荷的40-90%,废水处理去除效率高(> 90%) 。相比之下,具有低去除效率(<90%)的化合物的CSO排放贡献的年负荷不到10%。与经处理的废水排放相比,CSO排放中的雌激素,雄激素和WMP浓度通常高10倍。由于降雨径流对废水进行稀释,因此CSO排放样品中的化合物浓度通常随着流量的增加而降低。相反,由于去除效率降低,处理过的排放物中样品中激素和许多WMP的浓度会随着流量的增加而增加。

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  • 来源
    《Environmental Science & Technology》 |2012年第10期|p.5336-5343|共8页
  • 作者单位

    US Geological Survey, 425 Jordan Road, Troy, New York 12180, United States;

    US Geological Survey, Montpelier, Vermont, United States;

    US Geological Survey, Lakewood, Colorado, United States;

    US Geological Survey, Iowa City, Iowa, United States;

    US Geological Survey, Lakewood, Colorado, United States;

    US Geological Survey, 425 Jordan Road, Troy, New York 12180, 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
  • 中图分类
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