某大型曝气生物滤池工艺污水处理厂的提标改造案例分析  

Case Analysis of Upgrading and Reconstruction of a Large-Scale WWTP with Biological Aerated Filter Process

作　　者：文康 WEN Kang(Shanghai Municipal Engineering Design InstituteCo.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092

出　　处：《净水技术》2025年第4期172-181,共10页Water Purification Technology

摘　　要：【目的】2019年广东省某污水处理厂的设计规模为40万m^(3)/d,要求出水水质由一级A标准提升至《地表水环境质量标准》(GB 3838—2002)中的Ⅳ类水标准(总氮、悬浮物质、粪大肠菌群不低于一级A标准,化学需氧量、氨氮、五日生化需氧量、总磷质量浓度分别不低于30.0、1.5、6.0、0.3 mg/L)。【方法】在分析现有实际运行情况的基础上,指出了配水系统、反冲洗系统、滤池系统的短板,通过调整回流比、减小滤料高度、更新滤头和滤料等方式对现状滤池原位改造,通过新建高效沉淀池和改造预处理系统强化了预处理的处理效率,通过新建反硝化生物滤池和微砂沉淀池保证总氮和悬浮物质的达标。【结果】改造后工艺可有效地去除水中污染物,出水水质稳定达标。【结论】提标改造工程在有限用地范围内充分挖掘原有工艺的处理潜能,单位新增用地面积仅为0.035 m^(2)/(m^(3)·d^(-1)),具有较好的环境效益和经济效益,为类似污水处理厂提供了曝气生物滤池的系统评估方法、原位挖潜改造途径和极限用地下的脱氮能力提升路线。[Objective]The design scale of a wastewater treatment plants(WWTP)in Guangdong Province in 2019 is 400000 m^(3)/d,which required the effluent quality to be upgraded from Grade A standard to Class Ⅳ water standard in Surface Water Environmental Quality Standard(GB 3838—2002)(total nitrogen,suspended solid and fecal coliform group are not lower than Grade A standard,chemical oxygen demand,ammonia nitrogen,biochemical oxygen demand,and total phosphorus are not lower than 30.0,1.5,6.0,and 0.3 mg/L).[Methods]Based on the analysis of the existing actual operation,shortcomings of the water distribution system,backwashing system and filter system are pointed out.The existing filter is reformed in situ by adjusting the reflux ratio,reducing the height of the filter material,updating the filter head and filter material,etc.The treatment efficiency of the pretreatment is strengthened by building a high-efficiency sedimentation tank and reforming the pretreatment system.The standard of total nitrogen and suspended solid is ensured by building a denitrifying biological filter and a micro-sand sedimentation tank.[Results]The modified process can effectively remove the pollutants in the water,and the effluent quality is stable and up to standard.[Conclusion]The upgrading project fully taps the treatment potential of the original process within the limited land area,The new land area per ton of water is 0.035 m^(2)/(m^(3)·d^(-1)),it has achieved better social and economic benefits.This paper provides a systematic evaluation method of biofilter aerated,a way of in-situ potential excavation and a way of increasing nitrogen removal capacity of underground limit use for similar WWTPs.

关 键 词：污水处理厂(WWTP) 用地紧张 提标改造 曝气生物滤池 预处理 配水系统 反冲洗 

分 类 号：TU992[建筑科学—市政工程]