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首页> 外文期刊>Environmental Science & Technology >Comparative Life Cycle Assessment of Advanced Wastewater Treatment Processes for Removal of Chemicals of Emerging Concern
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Comparative Life Cycle Assessment of Advanced Wastewater Treatment Processes for Removal of Chemicals of Emerging Concern

机译：比较先进的废水处理工艺的生命周期评估，以消除新兴的化学物质

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摘要

The potential health effects associated with contaminants of emerging concern (CECs) have motivated regulatory initiatives and deployment of energy- and chemical-intensive advanced treatment processes for their removal. This study evaluates life cycle environmental and health impacts associated with advanced CEC removal processes, encompassing both the benefits of improved effluent quality as well as emissions from upstream activities. A total of 64 treatment configurations were designed and modeled for treating typical U.S. medium-strength wastewater, covering three policy-relevant representative levels of carbon and nutrient removal, with and without additional tertiary CEC removal. The USEtox model was used to calculate characterization factors of several CECs with missing values. Stochastic uncertainty analysis considered variability in influent water quality and uncertainty in CEC toxicity and associated characterization factors. Results show that advanced tertiary treatment can simultaneously reduce nutrients and CECs in effluents to specified limits, but these direct water quality benefits were outweighed by even greater increases in indirect impacts for the toxicity-related metrics, even when considering order-of-magnitude uncertainties for CEC characterization factors. Future work should consider water quality aspects not currently captured in life cycle impact assessment, such as endocrine disruption, in order to evaluate the full policy implications of the CEC removal.
机译：与新出现的污染物（CEC）相关的潜在健康影响推动了监管计划的发展，并采用了能源和化学密集型高级处理工艺来去除这些污染物。这项研究评估了与先进的CEC清除流程相关的生命周期对环境和健康的影响，包括改善污水质量的好处以及上游活动的排放。设计和建模了总共64种处理方案，以处理典型的美国中等强度废水，涵盖了三个政策相关的代表性碳和养分去除水平，以及是否需要去除三次CEC。 USEtox模型用于计算缺少值的几个CEC的特征因子。随机不确定性分析考虑了进水水质的变化以及CEC毒性和相关特征因素的不确定性。结果表明，高级三级处理可同时将废水中的养分和CECs降低到规定的限度，但这些直接水质的收益却被毒性相关指标的间接影响更大的增长所抵消，即使考虑到不确定性的数量级不确定性也是如此。 CEC表征因素。未来的工作应考虑生命周期影响评估中目前未涵盖的水质方面，例如内分泌干扰，以评估去除CEC的全部政策含义。

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  • 来源
    《Environmental Science & Technology》 |2018年第19期|11346-11358|共13页
  • 作者

    Rahman Sheikh M.; Eckelman Matthew J.; Onnis-Hayden Annalisa; Gu April Z.;

  • 作者单位

    Northeastern Univ, Dept Civil & Environm Engn, 400 Snell Engn Ctr,360 Huntington Ave, Boston, MA 02115 USA;

    Northeastern Univ, Dept Civil & Environm Engn, 400 Snell Engn Ctr,360 Huntington Ave, Boston, MA 02115 USA;

    Northeastern Univ, Dept Civil & Environm Engn, 400 Snell Engn Ctr,360 Huntington Ave, Boston, MA 02115 USA;

    Northeastern Univ, Dept Civil & Environm Engn, 400 Snell Engn Ctr,360 Huntington Ave, Boston, MA 02115 USA;

  • 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);
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  • 正文语种 eng
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