缺氧生物滤池处理城市污水模型与仿真

Modelling and Simulation of Anoxic Biofilter for Municipal Wastewater Treatment

为进一步了解缺氧生物滤池的工艺过程特性,基于影响缺氧生物滤池处理城市污水性能的分析,从生物滤池的流体力学、过滤特性及生物膜特性3方面考虑,建立了一个能反映生物滤池内微生物降解基质和生物滤池逐渐堵塞的数学动力学模型,并采用牛顿迭代法,通过MATLAB软件编程求解。实验室规模的上向流缺氧生物滤池试验结果与计算机仿真结果的对比表明:该模型能有效仿真上向流生物滤池在不同负荷和运行条件下的性能。

For a further understanding of biofilter, a mathematical model is developed based on the analysis of the main effects on the up flow anaerobic biofilter(UFAB), which can characterize not only the substrate removal dynamics but also the gradual biofilter clogging. The model considers three aspects: the biological reaction, deep filtration and hydrodynamics, and consists of flow rate of UFAB, the substrate and suspend solid concentration in the influent, and diameter, surface area, porosity of support medium. By applying the model to the experimental UFAB, and contrasting the simulated and experimental data, the authors prove the model can simulate availably the performance of the biofilter, which is operated on different loading and environment. The model can be used as an effective tool for the wastewater treatment plants operation management and the biofilter optimizing design accurately.