Terashima Mitsuharu, Goel Rajeev, Komatsu Kazuya, Yasui Hidenari, Takahashi Hiroshi, Li Y Y, Noike Tatsuya
Kurita Water Industries Ltd, Shimotsuga-gun, Tochigi, Japan.
Bioresour Technol. 2009 Apr;100(7):2228-33. doi: 10.1016/j.biortech.2008.07.069. Epub 2008 Dec 9.
A three-dimensional CFD model incorporating the rheological properties of sludge was developed and applied to quantify mixing in a full-scale anaerobic digester. The results of the model were found to be in good agreement with experimental tracer response curve. In order to predict the dynamics of mixing, a new parameter, UI (uniformity index) was defined. The visual patterns of tracer mixing in simulation were well reflected in the dynamic variation in the value of UI. The developed model and methods were applied to determine the required time for complete mixing in a full-scale digester at different solid concentrations. This information on mixing time is considered to be useful in optimizing the feeding cycles for better digester performance.
建立了一个包含污泥流变特性的三维计算流体动力学（CFD）模型，并将其应用于全尺寸厌氧消化池中混合情况的量化。发现该模型的结果与实验示踪剂响应曲线吻合良好。为了预测混合动力学，定义了一个新参数UI（均匀性指数）。示踪剂在模拟中的混合视觉模式在UI值的动态变化中得到了很好的体现。所开发的模型和方法被用于确定全尺寸消化池中不同固体浓度下完全混合所需的时间。这些关于混合时间的信息被认为有助于优化进料周期，以提高消化池性能。
