Abstract The goal of the present paper is to investigate the aeration process and the enhanced effect of baffles in a full-scale commercial membrane bioreactor (MBR) system configured with a flat sheet (FS) membrane module. Through a computational fluid dynamics (CFD) simulation, two aerated FS membrane modules for full-scale applications with 26 membrane sheets were simulated. The numerical results indicate that the presence of baffles and the distances between the baffle and the outmost membrane sheet have a minor influence on the area-weighted shear stress for full-scale MBRs. In addition, bubble size and the bottom distance between the aerator and membrane bottom do not affect the average shear stress of full-scale FS membrane modules much. However, an increase in air flow rate has a significant effect on the area-weighted shear stress. A large FS membrane module is recommended, as it could achieve the same cleaning effect as the small one with a lower specific aeration demand for membranes.

中文翻译：

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CFD 模拟全尺寸商业平板模块中的曝气过程和挡板影响

摘要本文的目的是研究配置有平板（FS）膜组件的全尺寸商业膜生物反应器（MBR）系统中的曝气过程和挡板的增强效果。通过计算流体动力学 (CFD) 模拟，模拟了两个具有 26 个膜片的全尺寸应用的曝气 FS 膜组件。数值结果表明，挡板的存在以及挡板与最外层膜片之间的距离对全尺寸 MBR 的面积加权剪切应力影响较小。此外，气泡尺寸以及曝气器与膜底部之间的底部距离对全尺寸FS膜组件的平均剪应力影响不大。然而，空气流量的增加对面积加权剪切应力有显着影响。推荐使用大型FS膜组件，因为它可以达到与小型膜组件相同的清洗效果，但对膜的比曝气量需求较低。