Calibration of denitrifying activity of polyphosphate accumulating organisms in an extended ASM2d model

Water Research
F García-UsachA Seco

Abstract

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 η(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 simulat...Continue Reading

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Citations

Feb 17, 2015·Scientific Reports·Ao ZhuYongzhen Peng
Jun 27, 2015·Environmental Science & Technology·Yiwen LiuBing-Jie Ni
Feb 16, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ana B LanhamMaria A M Reis
Nov 7, 2021·The Science of the Total Environment·Zeyu LiYong Sik Ok

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