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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Study of waste stabilization pond geometry for the wastewater treatment efficiency
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Study of waste stabilization pond geometry for the wastewater treatment efficiency

机译：废水稳定池几何形状对废水处理效率的研究

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The simulation of hydrodynamics in waste stabilization ponds is a developing tool worth studying in order to understand their internal processes and interactions.Pond design involves several physical,hydrological,geometrical and dynamic variables to provide high hydrodynamic efficiency and maximum substrate utilization rates.Computational fluid dynamic modelling (CFD) allows the combination of these factors to predict the behavior of ponds by using different configurations.The two-dimensional depth-integrated model SMS was used in this study to simulate hydrodynamics and water quality.A set of 12 configurations including baffling and pond geometry was modeled.The model was run at steady state with raw wastewater to study the effect of the assumed rectangular shapes and dimensions with constant area,for various values of water depth,flow rate and hydraulic retention time (HRT) of raw wastewater.The model was also run for different rectangular shapes with baffles.The area was manipulated by increasing the ratio between rectangular width and length as one,two,three and four times,respectively.Biochemical oxygen demand (BOD),dissolved oxygen (DO) concentrations and velocities distribution were recorded for different rectangular shapes with different numbers of baffles.Results showed that the rectangular shape ratio (L_1/L_2 = 4) with the provision of two and four cross baffles at 1/3L (two baffles) and 1/5L (four baffles),respectively,most efficient to improve overall water quality.
机译：废物稳定池的水动力学模拟是一个值得研究的开发工具，以了解其内部过程和相互作用。池塘设计涉及多个物理，水文，几何和动态变量，以提供较高的水动力学效率和最大的底物利用率。建模（CFD）允许这些因素的组合使用不同的配置来预测池塘的行为。本研究使用二维深度集成模型SMS来模拟水动力和水质。一组12种配置包括挡板和水对池塘的几何形状进行建模。在原始废水稳态下运行该模型，以研究假定的矩形和恒定面积的矩形尺寸对原始废水的水深，流速和水力停留时间（HRT）的影响。该模型还针对带有挡板的不同矩形形状运行。通过分别将矩形的宽度与长度之比增加一倍，二倍，三倍和四倍。记录了不同矩形，不同挡板数量的生化需氧量（BOD），溶解氧（DO）浓度和速度分布。结果表明，矩形比例（L_1 / L_2 = 4）分别在1 / 3L（两个挡板）和1 / 5L（四个挡板）处分别提供两个和四个交叉挡板，最有效地改善了整体水质。

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