某大型半地下式污水处理厂工艺设计特点分析  

ANALYSIS ON DESIGN CHARACTERISTICS OF A LARGE-SCALE SEMI-UNDERGROUND WASTEWATER TREATMENT PLANT

作　　者：李瑞成 LI Rui-cheng(Central and Southern China Municipal Engineering Design&Research Institute Co.,Ltd,Wuhan 430010,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,武汉430010

出　　处：《环境工程》2020年第7期109-115,共7页Environmental Engineering

摘　　要：福田污水处理厂设计规模为40万m^3/d,为国内首座设计的双层覆盖半地下式结构形式的污水厂,加盖二层顶部规划建设为市政公园,出水水质执行GB 18918—2002《城镇污水处理厂污染物排放标准》一级A标准,泥饼含水率≤50%。对污水厂处理工艺的选择与设计、设计特点及新技术的应用等进行了介绍;针对进水SS高、脱氮任务重、污泥处理要求高的设计难点,污水预处理系统设置了初沉池,污水处理采用多点进水多段强化脱氮改良A^2/O工艺,污泥处理采用"机械浓缩+板框深度脱水"工艺。项目建成后运行稳定,效果良好,出水水质优于设计标准。The Futian Sewage Treatment Plant(STP)is the first semi-underground STP in China,with a design capacity of 4×10^5 m^3/d,and the covering land as the second floor was planned to build as a municipal park.This STP effluent complied with the first A standard of Discharge Standard of Pollutants for Urban Sewage Treatment Plants(GB 18918—2002).The moisture content of sludge cake was reduced to 50%.This paper introduced the wastewater treatment process selection,design features,and application of innovating technologies.Due to the higher concentration influent SS,heavy nitrogen removal,and high requirements of sludge treatment,the treatment processes included rectangular primary sedimentation tank for the pretreatment process,multi-influent,multi-stage enhanced denitrification and improved A^2/O biological tank,rectangular secondary sedimentation tank,fiber rotary filter and ultraviolet disinfection.The sludge treatment process finally employed the combination of mechanical concentration+plate and frame deep dehydration.After the project completed,the production operation was stable,and the water quality of effluent was better than the design standard.

关 键 词：污水处理 双层覆盖半地下式 初沉池 多点进水多段强化脱氮改良A^2/O工艺 板框深度脱水 

分 类 号：X703[环境科学与工程—环境工程]