Université de Toulouse, INSA, UPS, INP, LISBP 135 Avenue de Rangueil, F-31077 Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France; CNRS, UMR5504, F-31400 Toulouse, France.
Dynamita, Nyons, France.
Water Res. 2015 Apr 15;73:157-70. doi: 10.1016/j.watres.2014.12.053. Epub 2015 Jan 9.
A dynamic physico-chemical model for chemical phosphorus removal in wastewater is presented as a tool to optimize chemical dosing simultaneously while ensuring compliant effluent phosphorus concentration. This new model predicts the kinetic and stoichiometric variable processes of precipitation of hydrous ferric oxides (HFO), phosphates adsorption and co-precipitation. It is combined with chemical equilibrium and physical precipitation reactions in order to model observed bulk dynamics in terms of pH. The model is calibrated and validated based on previous studies and experimental data from Smith et al. (2008) and Szabo et al. (2008) as a first step for full-plant implementation. The simulation results show that the structure of the model describes adequately the mechanisms of adsorption and co-precipitation of phosphate species onto HFO and that the model is robust under various experimental conditions.
本文提出了一个用于废水中化学除磷的动态物理化学模型，作为一种工具来同时优化化学投加，同时确保合规的出水磷浓度。该新模型预测了水合氧化铁（HFO）沉淀、磷酸盐吸附和共沉淀的动力学和化学计量变量过程。它与化学平衡和物理沉淀反应相结合，以便根据 pH 值来模拟观察到的总体动力学。该模型是基于以前的研究和 Smith 等人（2008 年）和 Szabo 等人（2008 年）的实验数据进行校准和验证的，作为全工厂实施的第一步。模拟结果表明，该模型的结构充分描述了磷酸盐物种在 HFO 上吸附和共沉淀的机制，并且该模型在各种实验条件下具有鲁棒性。
