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首页> 外文会议>European and Asian Junior Scientists Workshops; 20031108-11 and 20040207-10; Almograve(PT) and Malacca(MY) >Combined Sewer Overflows Into The Crati River (Cosenza, Italy)
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Combined Sewer Overflows Into The Crati River (Cosenza, Italy)

机译：合并的污水流入克雷蒂河（意大利科森扎）

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摘要

Combined Sewer Overflows (CSOs) have been for long time present in the technical literature. A short review of recent contributions is given in the paper. Regulations for reducing CSO impact in the U.S., EU and in Italy are then considered. Different means of controlling CSOs are discussed and among them retention storage is considered as the most frequent. Observations from an experimental catchment in Cosenza, Italy, drained by a combined sewer system with overflow facility, are then presented. They include 28 CSO events, for which the complete hydrographs were registered, obtaining the overflows hydrographs. Six more events were observed for quality data, and TSS, BOD and COD were measured; a regression equation between TSS, BOD and COD was found. Pollutant rates were represented against stormwater volumes, and first foul flush seems to be present only in one of the six events. As EU regulations demand complete storage and treatment of combined sewer overflows, different retention volumes of an off-line tank were analysed, provided that a discharge from 3 to 4 times the dry weather discharge is continuously treated by the treatment plant during storms. Values of the order of 150-200 m~3/ha should reduce the final spill into receiving waters to a few events per year.
机译：长期以来，技术文献中一直存在下水道溢流（CSOs）的问题。本文简要概述了最近的贡献。然后考虑减少美国，欧盟和意大利的CSO影响的法规。讨论了控制CSO的不同方法，其中最常使用保留存储。然后介绍了来自意大利科森扎（Cosenza）一个实验流域的观测结果，该观测流域由带下水道设施的联合下水道系统排水。它们包括28个CSO事件，已为其注册了完整的水文图，从而获得了溢出水文图。观察到另外六个事件的质量数据，并测量了TSS，BOD和COD。发现了TSS，BOD和COD之间的回归方程。以雨水量为代表的污染物发生率，第一次污垢冲刷似乎只出现在六个事件之一中。由于欧盟法规要求对下水道溢流进行完整的存储和处理，因此，如果在暴风雨期间污水处理厂连续处理三到四倍的干燥天气排放量，则需要分析离线罐的不同保留体积。大约150-200 m〜3 / ha的值应将每年流入接收水域的最终溢漏减少到每年几次。

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