山地城市半地下污水厂建设与竖向空间综合利用案例

Case Study on Construction of Semi-underground Sewage Treatment Plant and Comprehensive Utilization of Vertical Space in Mountain Cities

重庆唐家桥污水厂位于核心商圈,周边住宅密集。为消除臭气对周边居民的影响,改善整体景观,采用集环保、节能和综合利用于一体的污水厂原址重建、整体加盖方案,将旧厂拆除,改扩建为半地下式污水处理厂,污水处理能力由4.8×104 m3/d提高至6×104 m3/d。结合山地城市空间特性,充分利用竖向立体空间,将污水厂上部空间建成城市广场、公共停车库和综合大楼,提高土地资源利用率。污水处理采用具有前置反硝化脱氮功能的两级生物滤池工艺,占地面积小,出水水质稳定达到一级A标准,部分指标达到Ⅳ类地表水标准。尾水回用于绿化浇洒、水源热泵系统等,有效实现节能减排。臭气经处理后,通过综合办公楼里的专用排风廊道100 m高空排放。

Tangjiaqiao Sewage Treatment Plant of Chongqing was located in the core business circle,so the surrounding residential buildings were dense.In order to eliminate the impact of odor on surrounding residents and improve the overall landscape,the old plant was demolished and rebuilt into a semi-underground sewage treatment plant with the treatment capacity enhancement from 4.8×104 m3/d to 6×104 m3/d in the original site,and overall covering scheme integrating environmental protection was taken to combine energy conservation and comprehensive utilization.In combination with the spatial characteristics of mountain cities,the vertical three-dimensional space was fully used,the upper space of the sewage plant was built into an urban square,a public parking garage and a comprehensive building to improve the utilization of land resources.The sewage treatment plant adopted a two-stage biofilter process with pre-denitrification,which had a small footprint.The treated water was stable to meet the first class A standard,and some indicators reached the levelⅣof the environmental quality standards for surface water.The treated water was reused for greening,water source heat pumps,etc.,effectively achieving energy saving and emission reduction.The odor generated from the sewage plant was treated and discharged through the special exhaust corridor in the comprehensive building to 100-meter high atmosphere.