曝气充氧条件下受污染河道的水质模型建立及应用  

Water Quality Model and Its Application in Polluted River Remediation by Aeration

作　　者：薛罡[1] 刘亚男[1] 汪永辉[1] 李伟杰[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《环境科学》2010年第3期653-659,共7页Environmental Science

基　　金：教育部新世纪优秀人才计划项目(NECT-07-0175);教育部科学技术研究重点项目(107046);上海市基础研究重点项目(08JC1400500);教育部博士点基金新教师项目(200802551001);长江水环境教育部重点实验室开放基金项目(YRWEF08003);上海市重点学科"环境工程"开放基金项目(B604)

摘　　要：曝气充氧技术是修复受污染河道的主要方法之一.以曝气充氧方法治理修复受污染的上海市新港河道为例,通过理论分析建立了受污染河道的水质模型,确定了模型中参数的识别求解方法,并以实测值与模拟计算结果进行对照.结果表明,溶解氧的平均相对误差为11.38%,其中相对误差低于20%的占83.3%;生化需氧量的平均相对误差为9.16%,其中相对误差低于20%的占91.7%;氨氮的平均相对误差为11.15%,其中相对误差低于20%的占91.7%,除个别点的相对误差较大以外,其余均在20%以内.表明该模型能较好地反映在曝气充氧条件下新港河道水质的实际状况;同时,应用该模型模拟分析了曝气量、流速和底泥悬浮、温度对河道水质的影响,为曝气充氧修复受污染河道的工程设计及运行提供了理论计算方法及依据.Aeration is a main method to remediate polluted river water.Based on Shanghai Xingang River＇s aeration remediation,theoretical polluted water quality model was built.At the same time, parameters identification and solution were defined.Compared with observation values,the results from the model showed that： the dissolved oxygen had an average relative error of 11.38%,of which the relative error less than 20% accounted for 83.3%;BOD5 had an average relative error of 9.16%,of which the relative error less than 20% accounted for 91.7%;ammonia had an average relative error of 11.15%,of which the relative error less than 20% accounted for 91.7%.With the exception of the individual points,most of the values from this model had relative error less than 20%.This model could describe well Xingang River＇s water quality under aeration conditions.Aeration intensity,velocity,sediment suspension and temperature simulation were analyzed by this model,which provides theoretical calculation methods and the basis for engineering design and operation of polluted river aeration remediation.

关 键 词：曝气 水质模型 河道 模拟 

分 类 号：X522[环境科学与工程—环境工程]