Alex J, Kolisch G, Krause K
ifak e.V., Barleben, Germany.
Water Sci Technol. 2002;45(4-5):325-34.
The objective of this presented project is to use the results of an CFD simulation to automatically, systematically and reliably generate an appropriate model structure for simulation of the biological processes using CSTR activated sludge compartments. Models and dynamic simulation have become important tools for research but also increasingly for the design and optimisation of wastewater treatment plants. Besides the biological models several cases are reported about the application of computational fluid dynamics ICFD) to wastewater treatment plants. One aim of the presented method to derive model structures from CFD results is to exclude the influence of empirical structure selection to the result of dynamic simulations studies of WWTPs. The second application of the approach developed is the analysis of badly performing treatment plants where the suspicion arises that bad flow behaviour such as short cut flows is part of the problem. The method suggested requires as the first step the calculation of fluid dynamics of the biological treatment step at different loading situations by use of 3-dimensional CFD simulation. The result of this information is used to generate a suitable model structure for conventional dynamic simulation of the treatment plant by use of a number of CSTR modules with a pattern of exchange flows between the tanks automatically. The method is explained in detail and the application to the WWTP Wuppertal Buchenhofen is presented.
本项目的目标是利用计算流体动力学（CFD）模拟结果，自动、系统且可靠地生成一个合适的模型结构，用于使用连续搅拌釜式反应器（CSTR）活性污泥隔室模拟生物过程。模型和动态模拟已成为研究的重要工具，在污水处理厂的设计和优化中也越来越重要。除了生物模型外，还有一些关于计算流体动力学（CFD）在污水处理厂应用的案例报道。从CFD结果推导模型结构的方法的一个目的是排除经验结构选择对污水处理厂动态模拟研究结果的影响。所开发方法的第二个应用是分析运行不佳的污水处理厂，怀疑诸如短路流等不良流动行为是问题的一部分。所建议的方法首先需要通过使用三维CFD模拟计算生物处理步骤在不同负荷情况下的流体动力学。此信息的结果用于通过自动使用多个CSTR模块并在水箱之间设置交换流模式，为污水处理厂的常规动态模拟生成合适的模型结构。本文详细解释了该方法，并介绍了其在伍珀塔尔布申霍芬污水处理厂的应用。
