三级生物滤池工艺用于污水处理厂提标改造  

Application of Three-stage Biofilter Process in Upgrading of a WWTP

作　　者：杨巍 郑佳勇 李亮 刘武平 刘波 YANG Wei;ZHENG Jia-yong;LI Liang;LIU Wu-ping;LIU Bo(Southwest Municipal Engineering Design&Research Institute Co.Ltd.of China,Chengdu 610218,China)

机构地区：[1]中国市政工程西南设计研究总院有限公司,四川1成都610218

出　　处：《中国给水排水》2022年第24期87-91,共5页China Water & Wastewater

摘　　要：针对某污水处理厂项目投资受限和不能新增用地的特点,尽量利用原构筑物进行改造,一期工程采用中置硝化-两端反硝化脱氮三级生物滤池工艺,二期工程采用A^(2)/O生化池+高密度沉淀池+后置反硝化生物滤池工艺,全厂一、二期工程在深度处理阶段汇合处理。改造后的现状生物滤池和新建的中置硝化-后置反硝化生物滤池综合单元在雨季浓度情况下满足8.0×10^(4)m^(3)/d的处理规模;同时满足旱季高浓度进水水质时6×10^(4)m^(3)/d的处理能力。该项目改造后的单位生产总成本约2.26元/m^(3),单位经营成本约1.80元/m^(3);处理出水效果较好,出水COD<30 mg/L,BOD5<6 mg/L,NH3-N<1.5 mg/L,SS<10 mg/L,TN<10 mg/L,TP<0.3 mg/L,稳定达到《四川省岷江、沱江流域水污染物排放标准》(DB 51/2311—2016)。According to the project characteristics of limited investment and no new land use,the original structures are used for transformation as much as possible.Three-stage biofilter with intermediate nitrification and denitrification at both ends process is adopted in phaseⅠproject,the A^(2)/O biological tank,high-density sedimentation tank and post denitrification biofilter process is adopted in phaseⅡproject,and the effluents of both phase projects of the whole plant are treated together in the advanced treatment stage.After reconstruction,the primary biofilters and comprehensive units of intermediate nitrification and post denitrification biofilter meet the treatment capacity of 80 000 m^(3)/d in rainy season.Besides,it can meet the treatment capacity of 60 000 m^(3)/d for the water quality of high concentration influent in dry season.After transformation,the total unit production cost is about 2.26 yuan/m^(3) and the unit operating cost is about 1.80 yuan/m^(3).The effluent treatment effect is good,and the effluent COD,BOD5,NH3-N,SS,TN,TP are less than 30 mg/L,6 mg/L,1.5 mg/L,10 mg/L,10 mg/L,and 0.3 mg/L,respectively,which reach the Discharge Standard of Water Pollutants for Minjiang and Tuojiang River Basins in Sichuan Province (DB 51/2311-2016).

关 键 词：中置硝化-两端反硝化脱氮 三级生物滤池 高密度沉淀池 

分 类 号：TU992[建筑科学—市政工程]