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Abstract: The aim of this study was to establish an activated sludge model and to verify its predictability for use in a pilot-scale anoxic/anaerobic/aerobic/post-anoxic (modified AAO) process. Respirometric measurements were conducted to identify the influent organic characteristics and to determine the yield coefficient (Y _H) and decay coefficient (b _H) for heterotrophic biomass (OHOs). The values obtained for Y _H and b _H were 0.72 mg COD/mg COD and 0.275 d⁻¹, respectively. Within the model’s calibration, the most influential stoichiometric and kinetic parameters were identified with the aid of sensitivity analysis. The output of the model was most sensitive to parameters associated with the growth and decay of OHOs and ammonia-oxidizing biomass (AOB) (Y _H, μ _maxH, K _s, b _H, μ _maxA, K _NH4A, and b _aeroa,A). Furthermore, all the calibrated parameters, with the exception of Y _{PAO, aerob} related to the phosphorus accumulating organisms (PAOs), could be regarded as influential. Both steady-state and dynamic simulations indicated good agreement between the simulated and measured values of the output variables. The calibrated model can be used to provide insight into the pilot-scale modified AAO process, and information needed to optimize design and operation when applied at full-scale.

基于缺氧/厌氧/好氧/后缺氧工艺的活性污泥模型的校正及验证

研究目的：以中试规模的缺氧/厌氧/好氧/后缺氧污水处理工艺为研究对象，利用BioWin^TM软件平台及其内嵌的通用活性污泥数学模型，建立该工艺的模拟模型并进行校正及验证，为优化该工艺的设计及运行提供指导。
创新要点：成功建立了缺氧/厌氧/好氧/后缺氧工艺的活性污泥数学模型，甄别出对模型输出有显著影响的灵敏性参数。
研究方法：通过呼吸试验获取进水水质特征，利用BioWin^TM软件平台及其内嵌的通用活性污泥数学模型，建立该工艺的模拟模型，利用模型缺省值进行初步稳态模拟，借助灵敏度分析方法筛选出重要的化学计量学参数及动力学参数并进行模型校正，利用校正后的模型对该工艺进行了动态模拟。
重要结论：灵敏度分析可优化模型的校正过程，该工艺出水水质对异养菌（OHOs）和氨氧化菌（AOB）（Y_H、μ_maxH、K_s、b_H、μ_maxA、K_NH4A和b_aeroa,A）的灵敏度较高。校正后的模型稳态模拟出水水质（pH、COD、TN、NH₄⁺-N、NO₂⁻-N、NO₃⁻-N和TP）控制在与实测出水相应的95%置信区间内（图5），表明稳态模型建模成功，在此基础上运行的动态模拟准确地反映了工艺实际运行中的浓度变化趋势（图6），具有良好的模拟效果。
活性污泥模型；模拟；校正；验证；灵敏度分析

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