三级AO+深度处理组合工艺在中小型城镇污水厂中的应用  

Application of Combined Process of Three Stage AO+Advanced Treatment in Small and Medium Sized Urban WWTPs

作　　者：曾思雨 李甜[1] 万剑梅 曾荣辉 ZENG Siyu;LI Tian;WAN Jianmei;ZENG Ronghui(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]中国市政工程西南设计研究总院有限公司,四川成都610081

出　　处：《净水技术》2024年第7期183-189,205,共8页Water Purification Technology

基　　金：国家自然科学基金青年项目(52100012);中央高校基本科研业务费专项资金资助(22120240285)。

摘　　要：由于排放标准的提高和进水水质的变化,成都市某污水厂需提标改造。改造后,处理规模为2 500 m^(3)/d不变,出水水质需达到《四川省岷江、沱江流域水污染物排放标准》(DB 51/2311—2016)。本工程采用充分利用原有的生化池,改建为三级AO池并新建深度处理设施的改造方式,该改造方式节省投资、不新征用土地、抗冲击负荷强,仅需约30 min短时间碰管停水,改造后工艺运行稳定可靠,达到DB 51/2311—2016的要求(CODCr≤30 mg/L,氨氮≤1.5 mg/L,总氮≤10 mg/L,总磷≤0.3 mg/L)。项目可为中小型城镇污水厂提标改造提供借鉴经验。Due to the improvement of discharge standards and changes in inflow water quality,a wastewater treatment plant(WWTP)in Chengdu City needs to be upgraded and renovated.After renovation,the processing scale is 2500 m^(3)/d remains unchanged,and the effluent quality needs to meet the Water Pollutant Discharge Standards for the Minjiang and Tuojiang River Basins in Sichuan Province(DB 51/2311—2016).In response to unfavorable factors such as unstable inflow and water quality,severe limitations on investment and land use,and a concentration of inflow water that far exceeds that of ordinary urban domestic sewage,this project adopts a non-stop water transformation method that fully utilizes the original biochemical tank,transforms it into a tertiary AO tank,and builds a new advanced treatment facility.This transformation method which can investment,not require new land acquisition,has strong impact resistance,and only needs a short period of pipe collision to stop water.After the transformation,the process operation is stable and reliable,meeting the requirements of DB 51/2311—2016(CODCr≤30 mg/L,ammonia nitrogen≤1.5 mg/L,total nitrogen≤10 mg/L,total phosphorus≤0.3 mg/L).This can provide reference experience for the upgrading and renovation of small and medium-sized urban sewage plants.

关 键 词：多级AO 高密度沉淀池 反硝化深床滤池 提标改造 短时停水改造 

分 类 号：TU992[建筑科学—市政工程]