• 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

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

• 何新慧
• 1. 西安建筑科技大学环境与市政工程学院, 西安 710055; 2. 中冶东方工程技术有限公司, 包头 014010

• 张立卿
• 西安建筑科技大学环境与市政工程学院, 西安 710055

• 刘雪飞
• 西安建筑科技大学环境与市政工程学院, 西安 710055

• 王志盈
• 西安建筑科技大学环境与市政工程学院, 西安 710055

• 摘要：应用ASM2和Delft代谢模型,结合双SBR(A₂-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(A₂-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(X_PP/X_PAO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.

• Abstract：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/Nratio of 3.75(g·g^-1),a C/Pratio of more than 15(g·g^-1)and an SRT of 9～12 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(X_PP/X_PAO approaching 0.5)led to a low phosphorus removal rate.Phosphorus removal slowed or even stopped when the C/Pratio was less than 15.

• Key words：ASM2  Delft metabolic model  two sludge-SBR  denitrifying and phosphorus removal system  SRT  C/N  C/P

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