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Water quality changes during soil aquifer treatment of tertiary effluent

机译：土壤含水层处理三次污水过程中的水质变化

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摘要

This paper summarizes the results of field studies in Tucson, Arizona, to estimate the soil aquifer treatment (SAT) effectiveness of a 5.7-ha (14-acre) water spreading facility, the Sweetwater Underground Storage and Recovery Facility. Groundwater samples collected from the facility during 1989 to 1990 were analyzed for pathogens. A specific basin was selected during the 1990 to 1991, 1991 to 1992, and 1992 to 1993 recharge seasons for sampling source water (tertiary effluent), pore-liquid samples from the vadose zone, and groundwater during recharge. These samples were analyzed for the nitrogen species, dissolved organic carbon (DOC), and total organic halide (TOX). The results showed that the site provides effective SAT. Enteroviruses were completely removed during travel in the 37-m (120-ft) thick vadose zone. No Giardia were detected in any of the groundwater samples. The DOC and TOX were reduced by 92% and 85%, respectively. After leaching of indigenous nitrogen from the vadose zone, total nitrogen was reduced by approximately 47% during recharge. Near-surface anaerobic conditions promote de-nitrification.
机译：本文总结了亚利桑那州图森市的野外研究结果，以评估5.7公顷（14英亩）的洒水设施，Sweetwater地下存储和恢复设施的土壤含水层处理（SAT）效果。对1989年至1990年从该设施收集的地下水样品进行了病原体分析。在1990年至1991年，1991年至1992年以及1992年至1993年的补给季节中，选择了一个特定的流域，以对源水（三次排放），渗流带的孔隙液样品以及补给期间的地下水进行采样。分析了这些样品中的氮种类，溶解的有机碳（DOC）和总有机卤化物（TOX）。结果表明该站点提供了有效的SAT。在37毫米（120英尺）厚的渗流区中旅行期间，肠病毒被完全清除。在任何地下水样品中均未检测到贾第虫。 DOC和TOX分别减少了92％和85％。从渗流带浸出本地氮后，补给期间总氮减少了约47％。近地表厌氧条件促进反硝化作用。

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