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Drag Coefficient of Porous and Permeable Microbial Granules

机译：多孔和渗透性微生物颗粒的阻力系数

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Settling velocity of microbial aggregates, such as anaerobic and aerobic granules,in biologicalwastewatertreatment systems is highly related to their drag coefficient. In this work a new approach, taking the porosity and the permeability into account, was established to evaluate the drag coefficient of porous and permeable microbial granules. The effectiveness of this approach was demonstrated by the experimental results with both the anaerobic and the aerobic granules. The drag coefficient of the microbial granules was found to be less than that of smooth rigid spheres and Biofilm-covered particles. In addition, this study demonstrates that the drag coefficient of microbial granules depended heavily on their permeability and porosity. A fractal-cluster model was found to be able to predict the distribution of the primary particles in the microbial granules.
机译：生物废水处理系统中厌氧和好氧颗粒等微生物团聚体的沉降速度与其阻力系数高度相关。在这项工作中，建立了一种考虑孔隙度和渗透率的新方法来评估多孔和可渗透微生物颗粒的阻力系数。厌氧和好氧颗粒的实验结果证明了这种方法的有效性。发现微生物颗粒的阻力系数小于光滑的刚性球体和生物膜覆盖的颗粒的阻力系数。此外，这项研究表明，微生物颗粒的阻力系数在很大程度上取决于其渗透性和孔隙率。分形聚类模型被发现能够预测微生物颗粒中初级颗粒的分布。

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