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首页> 外文会议>Water Environment Federation annual technical exhibition and conference;WEFTEC 2003 >Combined Sewer Overflow Control: Performance of a Wet Weather Treatment Facility
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Combined Sewer Overflow Control: Performance of a Wet Weather Treatment Facility

机译：污水下水道综合控制：潮湿天气处理设施的性能

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Efforts aimed at reducing pollutant loads from combined sewer overflows (CSOs) on the Muddy Creek receiving waters in Cincinnati, OH have been underway in recent years. This includes an investigation of the treatment performance of a flow-through wet weather treatment facility (WWTF) using off-line sedimentation tanks, fine screening and chemical disinfection (which was inactive during this study). Calculations using hydrographs and water quality samples collected at the WWTF during rain events established the mass of BOD_5, COD and TSS removed. Ten storm events sampled from January-September 2002 helped characterize pollutant removal efficiencies for flow-through treatment during various runoff events. Pollutant removal was classified into four components: flow to the wastewater treatment plant (WWTP), treatment (sedimentation), storage and screening. Most pollutant removal was achieved through sedimentation and storage in the treatment tanks, with removal efficiencies of 20-50% for BOD_5 and 25-70% for TSS commonly observed. Owing to the high pollutant concentration in the early stages of the rain event, first-flush containment, or capturing and conveying the early portion of the runoff event to the WWTP, was the most efficient treatment method for every storm.
机译：近年来，旨在减少来自俄亥俄州辛辛那提市水域的Muddy Creek的联合下水道溢流（CSO）造成的污染物负荷的努力正在进行中。这包括对使用离线沉淀池的流通湿法天气处理设施（WWTF）的处理性能进行调查，精细筛选和化学消毒（在此研究中未启用）。使用雨水事件期间在WWTF收集的水文图和水质样本进行的计算确定了BOD_5，COD和TSS的质量被去除。 2002年1月至9月采样的十次暴风雨事件有助于表征各种径流事件中流经处理的污染物去除效率。污染物的去除分为四个部分：流入废水处理厂的废水，处理（沉淀），存储和筛选。大多数污染物的去除是通过沉淀和在处理池中存储来实现的，通常BOD_5的去除效率为20-50％，TSS的去除效率通常为25-70％。由于降雨事件早期的污染物浓度很高，因此，对每次暴风雨而言，最有效的处理方法是首先进行冲洗，将径流事件的早期部分捕获并输送到污水处理厂。

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