大型污水处理厂改造工程中海绵城市实施探索

Exploration on Implementation of Sponge City in Large-sized Wastewater Treatment Plant Reconstruction Project

摘要:

随着海绵城市建设理念的落实，上海市水务局发布《上海市水务设施（厂/站）海绵城市建设技术导则》，推进污水处理厂等水务设施进行海绵化。结合某大型污水厂改造工程，提出海绵城市设施建设方案，通过运用雨水缓存塘、植草沟、透水铺装等设施，实现新增建设区域内径流总量控制；通过雨水缓存塘的利用，提高服务地块雨水秩序能力，并错峰排入厂区已建雨水系统，避免已建雨水管道大面积翻建，同步提升厂区景观效果。通过海绵城市设施建设，工程新增区域可实现年径流总量控制率75%，雨水系统重现期达到3 a一遇标准。

Abstract:

With the implementation of the concept of sponge city construction, Shanghai Water Administration has issued the Technical Guidelines for Sponge City Construction of Shanghai Water Facilities (Plant / Station) in order to promote the sponge construction of water facilities. Combined with the reconstruction project of a large-sized wastewater treatment plant (WWTP), a construction scheme of sponge city facilities is proposed. By utilizing the facilities such as rainwater buffer pools, grass planting ditches and permeable paving, the control of runoff volume in the newly added construction area is realized. By utilizing the rainwater buffer pool, the rainwater order ability of the service plot is improved. And the rainwater is discharged into the built rainwater system of WWTP in the staggering peak, which can avoid the large-scale renovation of the built rainwater pipelines and synchronously improve the landscape effect of the WWTP area. Through the construction of sponge city facilities, the newly added areas of the project can achieve the control rate of annual runoff volume by 75%, and the return period of the rainwater system can reach the standard of once in three years.