脉冲曝气在大型膜生物反应器工程中的应用与优化  

Application and Optimization of Pulse Aeration in Large-scale Membrane Bioreactor

作　　者：孙剑宇 雷霆[3] 梁鹏[2] 黄霞[2,3] 刘慰[4] 陈颖 薛涛 俞开昌[5] SUN Jian-yu;LEI Ting;LIANG Peng;HUANG Xia;LIU Wei;CHEN Ying;XUE Tao;YU Kai-chang(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China;Research and Application Center for Membrane Technology,School of Environment,Tsinghua University,Beijing 100084,China;Meicun Wastewater Treatment Plant,Wuxi Hi-Tech Water Co.Ltd.,Wuxi 214112,China;Beijing Origin Water Technology Co.Ltd.,Beijing 102206,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]清华大学环境学院环境模拟与污染控制国家联合重点实验室,北京100084 [3]清华大学环境学院膜技术研发与应用中心,北京100084 [4]无锡市高新水务有限公司梅村水处理厂,江苏无锡214112 [5]北京碧水源科技股份有限公司,北京102206

出　　处：《中国给水排水》2021年第9期100-104,共5页China Water & Wastewater

摘　　要：基于某大型膜生物反应器(MBR)城市污水处理工程,开展了膜池脉冲曝气的应用与优化研究,旨在为该工程提供最优的曝气条件,并揭示不同曝气强度下膜池混合液特性与膜污染情况的变化规律。结果表明,当总曝气量由13000 m^(3)/h上升至17000 m^(3)/h时,膜比通量先上升后下降。曝气量的增大导致污泥混合液粒径减小,疏松的污泥胞外聚合物(LB-EPS)浓度下降,上清液有机物浓度上升,致使膜污染潜势上升。综合比较,该MBR工程膜池的最适曝气条件为中等曝气量(15000 m^(3)/h),在此工况条件下,膜池内组件的平均比通量达到0.95 L/(m^(2)·h·kPa)。Application and optimization of pulse aeration in membrane tanks were carried out in a large-scale membrane bioreactor(MBR)plant for municipal wastewater treatment,which aimed to determine the optimal aeration parameters for the project and to reveal the variation rule of the mixed liquid characteristics and membrane fouling under different aeration intensities.The specific membrane flux increased first and then decreased in the membrane tanks as the total aeration flow rate increased from 13000 m^(3)/h to 17000 m^(3)/h.The increase of aeration flow rate led to smaller particle size of the sludge in mixed liquor,lower organic concentration in loosely bound extracellular polymeric substances(LB-EPS)on sludge and higher organic concentration in supernatant,resulted in higher membrane fouling potential of supernatant.By comprehensive comparison,the optimal aeration rate of the MBR membrane tank was medium aeration rate(15000 m^(3)/h).Under the optimal condition,the average specific flux of the modules in the membrane tank reached 0.95 L/(m^(2)·h·kPa).

关 键 词：膜生物反应器 脉冲曝气 膜污染 优化 

分 类 号：TU992[建筑科学—市政工程]