重庆市巴南区南湖供水示范工程设计

Design of Demonstration Project for Water Supply from South Lake in Banan District of Chongqing

重庆市巴南区南湖供水示范工程规模为4×10~4m^3/d。工程内容包括:原水输水管、净水处理构筑物和清水输水管道三部分。水源为下涧口水库、丰岩水库和南彭水库,三座水库为串联重力流供水方式,总库容为3 400×10~4m^3。针对水库水质的特点,水厂采用小孔眼立体网格反应池、斜管沉淀池、均质石英砂滤料气水反冲洗滤池处理工艺。由于从水源至水厂、水厂至用户全流程均为重力流供水,因此本工程具有投资省、占地少、运行费用低及水压稳定的特点。一年多的运行实践表明,运行效果优于设计的预期要求,为其他类似水厂的建设提供了良好的示范。

The capacity of demonstration project for water supply from South Lake in Banan Dis- trict of Chongqing is 4 ×10^4m3/d The project includes three parts： raw water supply pipes, water treatment structures and drinking water supply pipes. The water sources are Xiajiankou reservoir, Fengyan reservoir and Nanpeng reservoir, which supply water in series through the gravity flow method. The total capacity of the three reservoirs is 3 400 ×10^4m3. Considering the quality of reservoir water, the combined process of small pore three-dimensional grid tank, inclined tube settler and air-water backwashing tilter with quartz sand is used in the water treatment plant. The method of gravity flow water supply is taken in the whole process from water sources to water treatment plant, until to the consumers, so the project has characteristics of less investment, small footprint, low operating cost and stable water pressure. The practical operation for one year shows that the project performs better than expected requirement, and it provides a good demonstration for construction of other similar projects.