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Selection and evaluation of water pretreatment technologies for managed aquifer recharge (MAR) with reclaimed water

Highlights•Multi-criteria approach to select water pretreatment for managed aquifer recharge.•Treatment evaluation based on the categories of critical contaminants.•Treatment options were identified based on treatment efficiency targets and credits.•The treatment trains were evaluated in terms of treatability, cost, and sustainability.•Approach was successfully applied to a case study for indirect potable reuse.AbstractManaged aquifer recharge with reclaimed water is a promising strategy for indirect potable reuse. However, residual contaminants in the treated wastewater effluent could potentially have adverse effects on human health. Hence, adequate water pretreatment is required. A multi-criteria approach was used to select and evaluate suitable water pretreatment technologies that can remove these critical contaminants in wastewater effluent for MAR identified in a previous study (Yuan et al., 2017). The treatment efficiency targets were calculated based on the concentrations and the suggested limits of critical contaminants. Treatment efficiency credits were then assigned to each treatment option for the removal of critical contaminants based on literature data. Treatment units that resulted in the highest efficiency credit scores were selected and combined into treatment train options, which were evaluated in terms of treatability, cost, and sustainability. This paper proposes an approach for the selection and evaluation of water treatment options, which will be helpful to guide the future implementation of MAR projects with reclaimed water.

انتخاب و ارزیابی فن‌آوری‌های پیش تصفیه آب برای تغذیه مصنوعی آبخوان (MAR)با آب بازسازی‌شده

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