活性污泥动力学模型的建立及在完全混合式污泥系统中的应用  

Kinetic model of activated sludge system and its application to completely mixed sludge system

作　　者：殷逢俊[1] 李多松[1] 

机构地区：[1]中国矿业大学环境与测绘学院,徐州221116

出　　处：《环境化学》2012年第3期269-277,共9页Environmental Chemistry

基　　金：中国矿业大学科研基金项目(0P061058)资助

摘　　要：首先建立了微生物衰减系数和污泥浓度、底物浓度的函数关系式,带入Lawrence-McCarty第一方程式得到了Logistic方程形式的微生物生长方程式.在分析污泥泥龄和污泥停留时间关系基础上,引入Monod方程建立了活性污泥动力学模型,推导证明了Lawrence-McCarty方程式是模型静态条件下的表达形式.用建立的活性污泥动力学模型对完全混合式污泥系统进行了模拟,并分析了水力停留时间Hydraulic retention time(HRT)和污泥停留时间Sludge retention time(SRT)对完全混合式污泥系统的影响,表明模型能很好地对活性污泥系统的动态过程进行模拟.根据模型编程画出了污泥系统相关变量关于HRT和SRT变化的三维曲面图,通过编程将复杂模型看作一定输入输出的函数,使得模型更易于应用和推广.This paper first establishes a function for attenuation coefficient,substrate concentration and activated sludge concentration.Introducing the function into the first equation of Lawrence-McCarty,logistic equation was derived which describes the growth of microbe.Based on the relationship between sludge age and sludge retention time（SRT）,a kinetic model of activated sludge system with Monod equation is established,proving that Lawrence-McCarty equation is a special expression of the model under static conditions.The simulation of completely mixed sludge system using the established kinetic model have been satisfied with the results,and the conclusion from analyzing the influence of HRT and SRT on completely mixed sludge system proved that the kinetic model can simulate the dynamic changes of activated sludge process well.The paper draws the three-dimensional surface chart of related system variables changing with HRT and SRT by programming the kinetic model.Through computer programming,the complicated model can be regarded as a function of certain input and output,and this makes the model much easier to use and popularize.

关 键 词：污泥泥龄 污泥停留时间 活性污泥动力学模型 完全混合式污泥系统 

分 类 号：X703[环境科学与工程—环境工程]