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化工学报  2015 

五箱一体化活性污泥工艺的数学模拟与校正

DOI: 10.11949/j.issn.0438-1157.20140970, PP. 393-401

Keywords: 五箱一体化活性污泥工艺,数学模拟,批式实验,灵敏度分析,遗传算法,参数识别

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Abstract:

对五箱一体化活性污泥工艺进行了数学模拟研究,针对模型中的动力学参数提出了一种迭代计算的校正方法。该方法结合了6个批式实验模拟(氨氮吸收速率AUR、硝氮吸收速率NUR、耗氧速率OUR、厌氧释磷速率PRR、好氧吸磷速率PUR_aerobic和缺氧吸磷速率PUR_anoxic)、灵敏度分析以及数学优化方法(遗传算法):通过迭代计算确定合适的污泥组分比例,完成对6个批式实验的模拟;灵敏度分析可以分别确定各个批式实验模拟中参数对模拟结果的影响程度,挑选待优化参数,完成参数识别;数学优化方法可以自动对参数进行校正。结果显示,校正后的模型对五箱一体化活性污泥工艺的模拟效果较好:6个批式实验的模拟值与测量值之间的平均相对误差(ARD)分别为5.65%、17.27%、6.02%、7.11%、13.07%和6.98%;30d动态出水COD、NH4+-N、TN和TP的ARD值分别为4.72%、18.87%、9.45%和38.11%。研究结果表明,提出的迭代方法可以用来对活性污泥模型进行校正,而且校正效果较好。

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