超大型综合体超深基坑地埋式再生水厂工程设计

Design of Ultra-large Comprehensive Complex Ultra-deep Foundation Pit UndergroundReclaimedWaterPlant

为治理南明河水系,做好长江上游生态屏障,破解城市主城区污水治理难题,贵阳市六广门、贵医再生水厂打造了全国首例超深基坑地埋式再生水厂与上部综合体结合的项目。将市政基础+生态环境+城市建筑融合一体,地上修建体育场、体育文化综合体和商业综合体,地下修建商业体、停车场及污水处理厂。六广门再生水厂规模为12×10^(4)m^(3)/d,核心处理工艺为MBR,采用中细格栅+曝气沉砂池+膜格栅+传统活性污泥生化池+MBR膜池+紫外线消毒工艺,主要出水指标达到地表Ⅳ类水体标准,出水排入贯城河,最终作为南明河生态补水.

To remedy the Nanming River system,construct an ecological barrier in the upper Yangtze River and solve the problem of sewage treatment in the downtown,the first project of ultra-deep foundation pit underground reclaimed water plant combined with upper comprehensive complex was constructed in Liuguangmen and Guiyi reclaimed water plants in Guiyang.The project integrated municipal infrastructure,ecological environment and urban architecture.The stadium,sport and cultural complex and commercial complex were built on the ground,while the commercial complex,parking lot and wastewater treatment plant were built underground.The core treatment process of Liuguangmen reclaimed water plant(12×10^(4)m^(3)/d)is MBR,which adopts the process of medium grid and fine grid,aerated sand sedimentation tank,membrane grid,traditional activated sludge biochemical tank,MBR and UV disinfection.The main indicators of effluent meet the surface water classⅣstandard,and the effluent is discharged into Guancheng River and finally used as ecological water supplement of Nanming River.