NSERC Chair in Water Treatment, Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
NSERC Chair in Water Treatment, Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
Chemosphere. 2017 Apr;172:294-301. doi: 10.1016/j.chemosphere.2016.12.120. Epub 2016 Dec 26.
Managed aquifer recharge (MAR) using highly treated effluent from municipal wastewater treatment plants has been recognized as a promising strategy for indirect potable water reuse. Treated wastewater effluent can contain a number of residual contaminants that could have adverse effects on human health, and some jurisdictions have regulations in place to govern these. For those that do not, but where reuse may be under consideration, it is of crucial importance to develop a strategy for identifying priority contaminants, which can then be used to understand the water treatment technologies that might be required. In this study, a multi-criteria approach to identify critical contaminants in wastewater effluent for MAR was developed and applied using a case study site located in southern Ontario, Canada. An important aspect of this approach was the selection of representative compounds for each group of contaminants, based on potential for occurrence in wastewater and expected health or environmental impacts. Due to a lack of MAR regulations in Canada, the study first proposed potential recharge water quality targets. Predominant contaminants, potential additional contaminants, and potential emerging contaminants, which together comprise critical contaminants for MAR with reclaimed water, were then selected based on the case study wastewater effluent monitoring data and literature data. This paper proposes an approach for critical contaminant selection, which will be helpful to guide future implementation of MAR projects using wastewater treatment plant effluents.
采用高度处理后的城市污水处理厂废水进行含水层人工补给（MAR）已被认为是间接饮用水再利用的一种有前途的策略。处理后的废水可能含有许多残留污染物，这些污染物可能对人体健康产生不良影响，有些司法管辖区已经制定了相关法规来加以管理。对于那些没有制定法规但可能正在考虑再利用的地区，制定识别优先污染物的策略至关重要，这可以帮助了解可能需要的水处理技术。本研究采用多标准方法，利用位于加拿大安大略省南部的案例研究地点，开发并应用了一种用于 MAR 的废水关键污染物识别方法。该方法的一个重要方面是根据在废水中的出现可能性和预期的健康或环境影响，为每个污染物组选择有代表性的化合物。由于加拿大缺乏 MAR 法规，该研究首先提出了潜在的回用水水质目标。然后根据案例研究废水出水监测数据和文献数据，选择 MAR 用再生水的主要污染物、潜在的附加污染物和潜在的新兴污染物，这些污染物共同构成了 MAR 的关键污染物。本文提出了一种关键污染物选择方法，这将有助于指导未来利用污水处理厂废水进行 MAR 项目的实施。
