Aix Marseille University, Centrale Marseille, CNRS, M2P2 UMR 7340, Europôle de l'Arbois, 13545, Aix en Provence, Cedex 4, France.
Environ Sci Pollut Res Int. 2015 Sep;22(17):12849-60. doi: 10.1007/s11356-014-3667-0. Epub 2014 Oct 12.
In this study, partial nitrification coupled with denitrification is modeled in a hybrid biofilm reactor with different hydraulic saturation conditions. The activated sludge model with two-step nitrification is implemented in GPS-X software. Hydrodynamic modeling by retention time distribution analysis and biokinetic measurement by respirometric tests are two significant parts of model calibration. By combining these two parts, partial nitrification in the aerobic part of the column is well simulated with a good agreement between experimental and modeled effluent concentrations of NH4 (+) and NO2 (-). Particularly, fully hydraulic saturation condition contributes to the large hydraulic volume of 1.9 L and high produced NO2 (-) concentration around 40 mg L(-1). However, modeling denitrification still needs to be improved with more calibrated parameters. Furthermore, three alternatives are proposed for the optimization of reactor design and operation.
本研究采用 GPS-X 软件中的改进型活性污泥模型（ASM2d）对不同水力饱和条件下复合式生物膜反应器中的短程硝化耦合反硝化进行了模拟。该模型的标定主要分为两部分：基于停留时间分布分析的水力学模拟和通过呼吸测量仪进行的生物动力学参数测量。这两部分结合后，可很好地模拟柱式好氧段的部分硝化过程，模型对 NH4 (+) 和 NO2 (-) 出口浓度的模拟效果与实验结果吻合良好。特别是在完全水力饱和条件下，柱式生物膜反应器具有 1.9 L 的大水力体积和大约 40 mg/L 的高 NO2 (-) 浓度。但是，反硝化过程的模拟仍需通过进一步优化来改进。此外，本研究还提出了三种优化反应器设计和运行的方案。
