ABSTRACT

This paper demonstrates modelling of the aerobic granular sludge (AGS) process with the pseudo-analytical solutions (PAS) of a biofilm model. A MATLAB programmed graphical user interface platform was developed to facilitate the model calculation and access. Model calibration and validation were carried out through using experimental data collected from a granular sludge sequencing batch reactor operation. The experimental and modelling results identified the distribution of heterotrophs and nitrifiers on the AGS and its contribution to the performance of wastewater treatment. The model could describe multi-species biofilms according to the distinguishing features among the three levels of PAS models. The models demonstrated increasing degrees of interaction (no interaction, competition for nitrogen and layering and protection) between heterotrophs and nitrifiers. Modelling the AGS process using PAS increases the accessibility of the simulation of multiple species in both biofilm and suspended biomass.

摘要

本文演示了使用生物膜模型的伪解析解 (PAS) 对好氧颗粒污泥 (AGS) 过程进行建模。开发了MATLAB编程的图形用户界面平台，以方便模型计算和访问。通过使用从颗粒污泥序批式反应器操作中收集的实验数据进行模型校准和验证。实验和建模结果确定了异养菌和硝化菌在 AGS 上的分布及其对废水处理性能的贡献。该模型可以根据PAS模型三个层次之间的区别特征来描述多物种生物膜。这些模型展示了越来越多的交互（没有交互，氮的竞争和分层和保护）异养生物和硝化生物之间。使用 PAS 对 AGS 过程进行建模增加了对生物膜和悬浮生物质中多个物种的模拟的可访问性。