深圳市某污水处理厂提标扩容工程节地工艺设计方案

深圳某污水处理厂提标扩容工程将设计规模由6万m3/d扩容至16万m3/d,设计出水水质由《城镇污水处理厂污染物排放标准》(GB 18918-2002)中的一级B标准提升至《地表水环境质量标准》(GB 3838-2002)中的准Ⅳ类水标准.本工程实际用地面积仅为4.2 hm2,通过原有构筑物拆除,新建了一套设计规模16万m3/d的污水处理设施,提标扩容工程采用多段AO生物反应池+双层二沉池+磁混凝沉淀池+紫外消毒的工艺流程.本工程总投资为52 165万元,单位经营成本1.03元/m3.本工程主体工程于2019年建成通水,水质能够稳定达到准Ⅳ类水标准.

Land-saving Technological Design Scheme for Upgrading and Expansion of a Wastewater Treatment Plant in Shenzhen

The design scale of a wastewater treatment plant (WWTP) upgrading and expansion project in Shenzhen is expanded from 60 000 m3/d to 160 000 m3/d. The designed effluent quality is upgraded from the Class I B standard in the Discharge Standard of Pollutants from Municipal Wastewater Treatment Plant (GB18918-2002) to Quasi IV class water standard in Environmental Quality Standards for Surface Water (GB3838-2002). The actual land area of this project is only 4.2 hm2. Through the demolition of the original structures, a set of sewage treatment facilities with a design scale of 160,000 m3/d is newly built. The technological process of multi-stage AO biological reaction tank + double-layer secondary sedimentation tank + magnetic coagulation sedimentation tank + UV disinfection is adopted in the upgrading and expansion project. The total investment of this project is 521.65 million rmb, and the operating cost is 1.13 rmb/m3. The main part of this project was completed and opened to water in 2019. The effluent water quality can stably reach the Quasi-IV water standard.