安康江南半地下再生水厂改良AAO+深度处理工艺设计

Design of Modified AAO and Advanced Treatment Process in Ankang Jiangnan Semi-underground Reclaimed Water Plant

安康江南再生水厂采用半地下建设形式,设计规模为8×10^(4)m^(3)/d,近期设备按6×10^(4)m^(3)/d安装。为满足汉江50年一遇防洪要求,箱体入口高于防洪水位0.52 m。通过集约化设计,将综合楼、科普馆、臭氧发生间布置于箱体顶部,其余空间打造景观公园。污水处理采用改良AAO加悬浮填料、臭氧接触氧化主体工艺,出水主要指标达到了《地表水环境质量标准》(GB 3838—2002)Ⅳ类标准。污泥处理采用离心脱水+低温干化工艺,处理后污泥含水率≤60%。通水运行以来,实际出水水质稳定优于设计标准。

Ankang Jiangnan reclaimed water plant is a semi-underground plant.Its design scale is 8×10^(4)m^(3)/d,and the equipment is installed according to recent scale of 6×10^(4)m^(3)/d.The box entrance is 0.5 m higher than the flood control level to meet the flood control requirements of Hanjiang River 50-year return period.Through intensive design,the complex building,science museum and ozone generation room were arranged on the top of the box,and the rest space was built as a landscape park.The main treatment process consists of modified AAO with suspended carrier and ozone contact oxidation tank,and the main indicators of effluent meet the classⅣlimit specified in Environmental Quality Standards for Surface Water(GB 3838-2002).The sludge treatment process includes centrifugal dewatering and low temperature drying,and water content of the treated sludge is lower than 60%.Since the operation,the actual effluent quality is always better than the design standard.