双SBR脱氮除磷工艺的数学模型分析  

Kinetic analysis of a two sludge-SBR denitrifying and phosphorus removing system

作　　者：何新慧[1] 张立卿[1] 刘雪飞[1] 王志盈[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《环境科学学报》2008年第6期1085-1092,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(No.50178059,50008014)~~

摘　　要：应用ASM2和Delft代谢模型，结合双SBR（A，-SBR）脱氮除磷系统的特点，建立了数学模拟器，并将其运用于双SBR脱氮除磷系统运行特性的动力学分析．主要探讨了不同泥龄、碳氮比、碳磷比对系统的影响，并从模型的角度进行了分析．结果表明，利用ASM2和Delft代谢模型结合所建立的数学模拟器可以对双SBR（A，-SBR）脱氮除磷系统进行模拟．双SBR中具有脱氮除磷功能的A2-SBR的运行参数是关键因素，最佳污泥龄为9—12d时，碳氮比为3．75左右，碳磷比大于15条件下，双SBR运行正常，能得到较好的处理效果．当系统在泥龄大于12d条件下运行时，由于PAO储存了大量的聚合态磷（XPP／XPAO。接近0．5）造成除磷效率降低．同样的原因也导致了碳磷比值低于15时，PAO的聚磷反应变慢或停止．Based on the Delft metabolic model and Activated Sludge Model No. 2 （ASM2）, a mathematical model was developed to characterize a two sludge-sequencing batch reactor （SBR） （A2-SBR）. The model predicts and simulates the kinetics of a denitrifying phosphorus removal system at different sludge retention times （SRT）, carbon source-to-ammonia concentration ratios （C/N） as well as carbon source-to-phosphate concentration ratios （C/P）. The predictive capability of the proposed model was excellent as evidenced from comparison of experimental results and model simulations. Optimal effects were achieved with an influent C/N ratio of 3.75 （g.g^-1）,a C/P ratio of more than 15 （g.g^-1） and an SRT of 9 N12 days. At the same time, the reasons for low efficiency nitrogen and phosphorus removal were analyzed. When the SRT is more than 12 days, large amounts of internal polyphosphate （Xpp/XpAO approaching 0.5 ） led to a low phosphorus removal rate. Phosphorus removal slowed or even stopped when the C/P ratio was less than 15.

关 键 词：ASM2 Delft代谢模型 双SBR 脱氮除磷工艺 污泥龄 碳氮比与碳磷比 

分 类 号：X703[环境科学与工程—环境工程]