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Comparison of contaminants of emerging concern removal, discharge,and water quality hazards among centralized and on-site wastewater treatment system effluents receiving common wastewater influent

机译:接受普通废水进水的集中式和现场废水处理系统废水中新出现的污染物去除,排放和水质危害的污染物比较

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摘要

A comparative understanding of effluent quality of decentralized on-site wastewater treatment systems, particularly for contaminants of emerging concern (CECs), remains less understood than effluent quality from centralized municipal wastewater treatment plants. Using a novel experimental facility with common influent wastewater, effluent water quality from a decentralized advanced aerobic treatment system (ATS) and a typical septic treatment system (STS) coupled to a subsurface flow constructed wetland (WET) were compared to effluent from a centralized municipal treatment plant (MTP). The STS did not include soil treatment, which may represent a system not functioning properly. Occurrence and discharge of a range of CECs were examined using isotope dilution liquid chromatography-tandem mass spectrometry during fall and winter seasons. Conventional parameters, including total suspended solids, carbonaceous biochemical oxygen demand and nutrients were also evaluated from each treatment system. Water quality of these effluents was further examined using a therapeutic hazard modeling approach. Of 19 CECs targeted for study, the benzodiazepine pharmaceutical diazepam was the only CEC not detected in all wastewater influent and effluent samples over two sampling seasons. Diphenhydramine, codeine, diltiazem, atenolol, and diclofenac exhibited significant (p < 0.05) seasonal differences in wastewater influent concentrations. Removal of CECs by these wastewater treatment systems was generally not influenced by season. However, significant differences (p < 0.05) for a range of water quality indicators were observed among the various treatment technologies. For example, removal of most CECs by ATS was generally comparable to MTP. Lowest removal of most CECs was observed for STS; however, removal was improved when coupling the STS to a WET. Across the treatment systems examined, the majority of Pharmaceuticals observed in on-site and municipal effluent discharges were predicted to potentially present therapeutic hazards to fish.
机译:相对于集中式市政废水处理厂的废水质量,对分散式现场废水处理系统的废水质量(尤其是对新兴关注的污染物(CEC))的比较了解仍然较少。使用具有常见进水废水的新型实验设施,将分散式高级好氧处理系统(ATS)和典型的化粪池处理系统(STS)与地下流人工湿地(WET)耦合后的废水水质与中央集中式市政废水进行了比较处理厂(MTP)。 STS不包括土壤处理,这可能表示系统无法正常运行。在秋季和冬季,使用同位素稀释液相色谱-串联质谱法检查了一系列CEC的发生和放电。还从每个处理系统评估了常规参数,包括总悬浮固体,碳质生化需氧量和养分。使用治疗危害模型方法进一步检查了这些废水的水质。在19个要研究的CEC中,苯并二氮杂卓类药物地西epa是在两个采样季节内所有废水进水和出水样品中唯一未检出的CEC。苯海拉明,可待因,地尔硫卓,阿替洛尔和双氯芬酸在废水进水浓度上表现出明显的季节差异(p <0.05)。这些废水处理系统去除CEC的时间通常不受季节的影响。但是,在各种处理技术之间,一系列水质指标存在显着差异(p <0.05)。例如,通过ATS去除大多数CEC通常与MTP相当。对于STS,大多数CEC的去除率最低。但是,将STS耦合到WET时,去除效果得到改善。在整个检查的处理系统中,预计在现场和市政污水排放中观察到的大多数药品都可能对鱼类造成治疗危害。

著录项

  • 来源
    《Science of the total environment》 |2014年第1期|976-984|共9页
  • 作者单位

    The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA,Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA;

    Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA;

    The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA,Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA;

    Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA;

    Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA,Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA;

    The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA,Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA,Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA;

    The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA,Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA,Department of Geology, Baylor University, Waco, TX 76798, USA;

    The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA,Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA,Institute of Biomedical Studies, Baylor University, Waco, TX 76798, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Effluent; Decentralized wastewater treatment; Pharmaceuticals; Wastewater indicators; Water quality;

    机译:废水分散废水处理;药品;废水指标;水质;

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