高密度用地背景下深圳某水质净化厂工艺研究

Research on the Process of aWater Purification Plant in Shenzhen Under the Background of High-density Land Development

深圳市作为我国超大型城市的代表,其土地资源高度紧张,城市水质净化厂等基础设施的建设趋向于采用立体化、紧凑化的用地模式。深圳埔地吓水质净化厂(三期)采用地下式水质净化厂+上盖公园的建设模式。通过对该水质净化厂污水处理工艺、污泥处理工艺以及除臭工艺方案进行比选研究,最后确定污水处理采用“三段式AAO”生物处理工艺、深度处理采用“磁混凝高效沉淀池+精密过滤器”工艺、污泥处理采用“浓缩+板框深度脱水+低温热干化”工艺,全流程采用生物除臭,出水水质指标能够稳定达到并优于设计标准。该地下式水质净化厂的建设与达标运行为超大型城市高密度用地情况下水质净化厂的升级改造提供了参考。

As a representative of super cities in China,Shenzhen is severe lacking of land resources so that the urban water purification plants and other infrastructure tend to be three-dimensional and compact design.The Shenzhen PscareWater Purification Plant(Phase III)was constructed in model of underground water purification plant+covered park.By comparing and studying the sewage treatment process,sludge treatment process,and deodorization process schemes,it was finally determined that the“three-stage anaerobic-anoxic-oxic(AAO)”biological treatment process was adopted for sewage treatment,the“magnetic coagulation high-efficiency sedimentation tank+precision filter”process for deep treatment,and the“concentration+plate and frame deep dehydration+low-temperature thermal drying”process for sludge treatment.The entire process was biological deodorized.The effluent quality indicators can stably meet and exceed the design standards.The construction and standard operation of this plant provide a reference for the upgrading and renovation of water purification plants in super cities with high-density land development.