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进水配比对三级AO工艺处理城市污水的影响

Effect of Influent Flow Distribution on the Efficiency of Three-Stage Anoxic Aerobic(AO)Process Treating MunicipalWastewater Treatment
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摘要 可调节分段进水是分段进水三级缺氧-好氧(AO)工艺优势之一。为探寻较优的进水配比,提高污染物去除效能,本研究构建三级AO小试实验装置,研究不同进水配比下污染物去除效果变化,采用物料衡算模型评估不同功能单元污染物降解量。结果表明,分段进水三级AO工艺最佳进水配比为5∶3∶2,在该条件下,COD和NH_(4)^(+)-N平均出水质量浓度分别为25.2和0.48 mg/L,TN和TP平均出水质量浓度分别为14.7、0.48 mg/L,满足一级A排放标准,各污染物去除率较为稳定。经物料衡算,分段进水有助于分担污染物处理负荷,使缺氧区进行异养硝化和反硝化除磷,以增强脱氮除磷效果。本研究可为污水处理厂选择进水配比提供理论依据。 Adjustable influent flow distribution is one of the advantages of the multi-feed influent three-stage anoxic aerobic(AO)process.This work constructed a lab-scale three-stage AO process to explore the superior distribution for improved efficiency of pollutant removal.The removal efficiency of pollutants was researched under different distinct distributions.Furthermore,a mass balance model was used to assess the amount of pollutant removal in different functional units.The results indicated that the best influent flow distribution of 5:3:2 for the three-stage AO process.The average effluent concentrations of COD,NH_(4)^(+)-N,TN,and TP were 25.2,0.48,14.7,and 0.48 mg/L respectively under the above distribution.These effluent concentrations of pollutants met the first-class A effluent discharge standard,and the pollutant removal rates were kept relatively stable.The mass balance calculation showed that the multi-feed influent process contributed to sharing the load of pollutant removal,and improved heterotrophic nitrification and denitrifying phosphorus removal for the removal of nitrogen and phosphorus.Thus,this work could provide a theoretical basis for the selection of influent flow distribution for sewage-treatment plants.
作者 黄潇 陈昕龙 董文艺 王宏杰 戴仲怡 马路遥 HUANG Xiao;CHEN Xinlong;DONG Wenyi;WANG Hongjie;DAI Zhongyi;MA Luyao(Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Nanjing University of Information Science and Technology,Nanjing 210044;Shenzhen Key Laboratory of Water Resources Utilization and Environmental Pollution Control,School of Civil and Environmental Engineering,Harbin Institude of Technology(Shenzhen),Shenzhen 518055;State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090;China Municipal Engineering Central South Design and Research Institute Co.,Ltd,Wuhan 430010,China)
出处 《水处理技术》 CAS CSCD 北大核心 2022年第12期109-113,118,共6页 Technology of Water Treatment
基金 企业委托课题:高效节能智能型生物强化脱氮工艺理论及应用 深圳市科技计划项目(KCXFZ202002011006362,KJYY20171012140149523 KJYY20180718094802190 KCXFZ202002011006362 JCYJ20200109113006046) 国家科技重大专项课题(2015ZX07306001-04) 城乡水环境健康系统关键技术研究(2021-QT-KJB-006)。
关键词 进水配比 三级AO 市政污水 脱氮除磷 influent flow distribution three-stage AO process municipal wastewater nitrogen and phosphorus removal
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