Calibration of denitrifying activity of polyphosphate accumulating organisms in an extended ASM2d model
Calibration of denitrifying activity of polyphosphate accumulating organisms in an extended ASM2d model
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DOI：
10.1016/j.watres.2010.06.061
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发表时间：
2010-10-01
期刊：
影响因子：
12.8
通讯作者：
Seco, A.
中科院分区：
文献类型：
--
作者：
Garcia-Usach, F.;Ribes, J.;Seco, A.
本文介绍了模拟和校准的聚磷酸盐积累的生物（PAO）在全面的污水处理厂，包括同步脱氮除磷的生物活性的实验研究结果。利用ASM2d模拟生物除磷过程的好氧和缺氧条件下不同的产率的便利性已被证明。因此，模型中的参数eta（PAO）被赋予物理意义，并且表示能够遵循DPAO代谢的PAO的分数。使用化学计量的关系，这是基于假定的生化途径，缺氧产量考虑在扩展的ASM2d可以得到作为其各自的好氧产量的函数。因此，这种修改并不意味着额外的校准工作，以获得新的参数。在这项工作中，离线校准方法已被应用到验证模型，其中提出了化学计量参数之间的一般关系，以避免增加校准参数的数量。结果已通过使用城市废水的UCT计划试点工厂得到验证。实验值和模拟值之间获得的良好一致性验证了缺氧产率以及校准方法的使用。确定性建模方法，连同离线校准方法，提出了协助决策进一步优化生物除磷的工艺，因为离线校准得到的参数值提供了有价值的信息，如系统中的DPAO的量的活性污泥法。(C)2010爱思唯尔有限公司版权所有。
This paper presents the results of an experimental study for the modelling and calibration of denitrifying activity of polyphosphate accumulating organisms (PAOs) in full-scale WWTPs that incorporate simultaneous nitrogen and phosphorus removal. The convenience of using different yields under aerobic and anoxic conditions for modelling biological phosphorus removal processes with the ASM2d has been demonstrated. Thus, parameter eta(PAO) in the model is given a physical meaning and represents the fraction of PAOs that are able to follow the DPAO metabolism. Using stoichiometric relationships, which are based on assumed biochemical pathways, the anoxic yields considered in the extended ASM2d can be obtained as a function of their respective aerobic yields. Thus, this modification does not mean an extra calibration effort to obtain the new parameters. In this work, an off-line calibration methodology has been applied to validate the model, where general relationships among stoichiometric parameters are proposed to avoid increasing the number of parameters to calibrate. The results have been validated through a UCT scheme pilot plant that is fed with municipal wastewater. The good concordance obtained between experimental and simulated values validates the use of anoxic yields as well as the calibration methodology. Deterministic modelling approaches, together with off-line calibration methodologies, are proposed to assist in decision-making about further process optimization in biological phosphate removal, since parameter values obtained by off-line calibration give valuable information about the activated sludge process such as the amount of DPAOs in the system. (C) 2010 Elsevier Ltd. All rights reserved.