1、 1 摘摘 要要 每一个城市都应该具备一套完整可靠的污水排放处理系统，以保证城市各项功能的 正常运转。 因此， 辽宁省 YSC 市的排水工程设计包括了三个主要的部分： 污水管网设计， 雨水管网设计及污水处理厂的设计。其目的是让本专业的学生对所学的知识有一个全面 系统的了解。 辽宁省 YSC 市地势西北高东南低，坡向城市东侧的自北向南流向的河流，该城东西 高差 20 米。夏季主导风向是西南风。城市中部被一条铁路分成两个区，两个区的人口 密度有所不同。污水管道与雨水管道沿地形布置以减小埋深，节省造价。 污水处理厂位于河流的下游，以避免污染上游水源。污水厂日处理水量 1488L/s,污 水处理过程分
2、为一级处理和二级处理。在一级处理过程中，固体颗粒从水中去除，二级 处理过程中，污水中 95%的有机物被去除。污水处理厂采用的处理工艺是传统的活性污 泥法，活性污泥法工艺已经发展成熟，并具有处理程度高，负荷高，占地面积少，设备 简单等优势。目前我国大部分污水处理厂采用此工艺，即污水经过格栅间由泵抽至沉砂 池后送至初沉池，再经曝气池曝气后进入二沉池，并在二沉池沉淀，最后处理后的污水 达到排放标准后排入水体。另外，污泥经浓缩，消化后压缩成泥饼运出厂外作为其他使 用。污水经过处理后，水质得以改善，均达到排放标准，保证公民饮用水的卫生及公民 的正常生活。 关键词关键词：排水管网；雨水管网；污水处理工艺；
3、 活性污泥法 环境影响 2 Abstract Every city should have a complete and reliable sewage treatment system to ensure that the city of the normal operation of various functions. Therefore, the city of Liaoning Province, YSC drainage engineering design includes three main components: the sewage pipe network design
4、, the design of rain water pipe network and sewage treatment plant design. Its purpose is to allow students the knowledge to have a comprehensive understanding of the system. YSC City, Liaoning Province, the high-lying low in the east-west, east slope cities from north to south flow of the rivers, t
5、he city 20 meters east-west elevation. Summer dominant wind direction is south-west wind. The central city by a railway is divided into two areas; two areas have different population densities. Sewers and storm water pipes along the layout to reduce the depth of the terrain, the cost savings. Sewage
6、 treatment plant is located in the lower reaches of rivers in order to avoid pollution of water resources upstream. On water, wastewater treatment plant to deal with 1488L / s, the sewage treatment process is divided into primary treatment and secondary treatment. In the primary treatment process, the solid particles removed from the water, secondary treatment process, 95% of sewage organic matter was removed. Sewage treatment plant used in traditional process is activated sludge, activated s
