This study investigated the occurrence and removals of micropollutants in the sewage treatment tank (STT) which is a typical private wastewater treatment facility used in the rural communities in Korea, and their impact on receiving water. STTs were selected in eight provinces to examine the regional difference in the composition of micropollutant occurrence. We measured ten selected micropollutants in influents and effluents of STTs, as well as upstream and downstream of its receiving surface water. The dominant micropollutants in the influent of the STTs were caffeine (13,346 ng/L), acetaminophen (11,331 ng/L), ibuprofen (1440 ng/L), and naproxen (1313 ng/L), in agreement with the amounts produced annually in Korea. In the effluent, caffeine (1912 ng/L), acetaminophen (1586 ng/L), naproxen (475 ng/L), and ibuprofen (389 ng/L) were detected in relatively high concentrations. The composition of micropollutants in STT influents showed little regional variation by provinces, suggesting that the consumption pattern of these micropollutants did not show regional variation. The removal efficiencies of the selected micropollutants at the STTs ranged from 12% (carbamazepine) to 88% (acetaminophen), lower than typical removal by sewage treatment plants (STPs). This result is probably due to the automatic operation systems and simple treatment processes in STTs compared with STPs. The concentrations of selected micropollutants upstream of the receiving water were generally lower compared with those observed downstream, indicating that effluent from STTs was the main source. The per capita discharge loads of STTs and annual emissions rates (kg/year) from private wastewater treatment facilities were estimated for the selected micropollutants. The removal of micropollutants in sewage treatment tanks (STTs) was examined. The composition of micropollutants in STT influents showed little regional variation. STT effluent was the major source of micropollutants on the receiving river. The per capita discharge load of target micropollutants in STTs was calculated. National emission load of micropollutants from private STTs was calculated. The removal of micropollutants in sewage treatment tanks (STTs) was examined. The composition of micropollutants in STT influents showed little regional variation. STT effluent was the major source of micropollutants on the receiving river. The per capita discharge load of target micropollutants in STTs was calculated. National emission load of micropollutants from private STTs was calculated.

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私人污水处理设施 (WTF) 中微污染物的发生和归宿及其对接收水的影响

本研究调查了污水处理池 (STT) 中微污染物的发生和清除情况，污水处理池是韩国农村社区使用的典型私人污水处理设施，及其对接收水的影响。在八个省份选择了 STT 来检查微污染物发生组成的区域差异。我们在 STT 的进水和出水以及接收地表水的上游和下游测量了 10 种选定的微污染物。STT 流入物中的主要微污染物是咖啡因 (13,346 ng/L)、对乙酰氨基酚 (11,331 ng/L)、布洛芬 (1440 ng/L) 和萘普生 (1313 ng/L)，与每年产生的量一致在韩国。在流出物中，咖啡因 (1912 ng/L)、对乙酰氨基酚 (1586 ng/L)、萘普生 (475 ng/L)、和布洛芬 (389 ng/L) 的检测浓度相对较高。STT进水中微量污染物组成各省区差异不大，说明这些微量污染物的消费模式不存在区域性差异。STT 对选定微污染物的去除效率从 12%（卡马西平）到 88%（对乙酰氨基酚）不等，低于污水处理厂 (STP) 的典型去除率。这一结果可能是由于与 STP 相比，STT 的自动化操作系统和简单的处理过程。与下游观察到的相比，受纳水上游选定的微污染物浓度通常较低，表明 STT 的流出物是主要来源。估算了选定微污染物的人均 STT 排放量和私人废水处理设施的年排放率（公斤/年）。检查了污水处理池 (STT) 中微污染物的去除情况。STT 进水中微污染物的组成显示出很小的区域差异。STT出水是受纳河微污染物的主要来源。计算了STTs中目标微污染物的人均排放负荷。计算了来自私人 STT 的微污染物的国家排放负荷。检查了污水处理池 (STT) 中微污染物的去除情况。STT 进水中微污染物的组成显示出很小的区域差异。STT出水是受纳河微污染物的主要来源。计算了STTs中目标微污染物的人均排放负荷。计算了来自私人 STT 的微污染物的国家排放负荷。