基于质量守恒的二沉池一维通量模型.pdfVIP

中国环境科学2006，26(Suppl．)：40～4J4 ChinaEnvironmentalScience 基于质量守恒的二沉池一维通量模型 张代钧1，弘，李振亮1，张 灾害控制工程教育部重点实验室，重庆400030) 摘要：基于质量守恒定律，导出了二沉池的一维通量模型．模型考虑了二沉池表面积的变化，低浓度污泥沉降和区域沉降采用了Takdcs速率 公式，压缩沉降采用了压缩沉降速率公式．结果表明，单元层的污泥质量守恒，模型在进水污泥浓度、进水流量、回流比及其组合的脉冲扰动 646—8 本上避免模拟失真，将二沉池分为30层及其以上可得到理想的模拟结果． 关键词：二沉池；通量模型；质量守恒；沉降速率 中图分类号：X703．1 文献标识码：A 文章编号：1000—6923(2006)S0—0040—05 Aone-dimensionfluxmodelforthe tankbasedonthemassconservation．ZHANG secondarysettling Tianl，CAO ofEnvironmental Zhen—lian91，ZHANGHai—binl(1．DepartmentScience，Chongqing fortheSouthwest 400030，China：2．KeyLaboratory China andEnvironmentalDisasterControl Resources，Exploitation of MinistryEducation，Chongqing 400030，China)．China Engineering，State University,Chongqing Science，2006，26(Suppl．)：40～44 onthemassconservation Abstract：Based law，aone—dimensionalfluxmodelforthe SecondarySealing cross—sectionalareaswasledout．Tak{icsfunctionwas for the atlow and varying adopteddescribingsettling thezone a functionforthe mass settling，andcompressionsettlingvelocity compressionsettling．Thesludge inunit themodelwasstill stableunderthedisturbancesofinfluentflow sofid layer,and very rate，influent returnflowratioandtheircombination．ThesimulatedSSTeffluent concentrationandretumflow sludge sludge concentrationwere and a littlewith measuredvalue of 16．40mg／L7．019／Lrespectively，coincidingactually range and forecastedblanket was thesame withthe 15-19mg／L6．46-8．329m．Thesludg