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污泥膜覆盖好氧发酵堆体流场模拟及应用研究

Keywords: 污泥好氧发酵堆体,流场模拟,通风管,多孔介质模型

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Abstract:

运用Gambit软件建立了污泥好氧发酵堆体的多孔介质模型,通过自行设计的实验装置获得了堆体的通风粘性阻力系数和惯性阻力系数以及功能膜压差与透气量之间的关系,用Fluent软件分析了堆体不同截面形状及底部通风管数量对堆体通风均匀性的影响,为确定合理的通风管数量及截面几何形状提供理论依据。对上海奉贤区城镇污水厂污泥处理工程发酵仓进行堆体流场模拟,确定堆体采用小拱形截面形状,堆高2m,宽8m,底部设置4条通风管,实际运行效果良好。

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