一、工程概况: 杭州市四堡污水处理厂工程在入江管(污水总排放口)未建成之前,已有20万m~3/d一组投产试运行,处理后的污水临时利用施工时的污水导流明渠排入钱塘江。考虑到污水总排入口建成投产后检修之需要,决定修建一个厂内事故污水排放口。 已建厂内污水排放暗渠起点为厂内2号泵房,出口接近钱江二桥桥墩,暗渠为2.2 I. Project Overview: The Hangzhou Sibao Sewage Treatment Plant project had a 200,000 m3/d set of commissioning trials before the completion of the inlet pipe (total sewage discharge port). The treated sewage was used temporarily during construction. The sewage diversion canal is discharged into the Qiantang River. Taking into account the need for maintenance and repair after the total discharge of sewage was completed, it was decided to build an accidental sewage discharge port in the factory. The starting point of the built-in sewage drainage culvert is the No. 2 pumping station in the factory. The exit is close to the bridge pier of Qianjiang No. 2 and the underdrain is 2.2.