Having previously established that the hydrodynamic effect introduced by slug bubbles is more effective and economic in fouling amelioration in flat sheet MBRs (FSMBR) than conventional bubbling, this work is focused on its implementation in a commercial FSMBR. The overall objective is to enhance the hydrodynamic effect on fouling control through the use of two‐stage large‐sized bubble development (coalescence and split). Computational Fluid Dynamics (CFD) was used to predict hydrodynamic features and substantial agreement was observed with experimental measurements. The critical height for bubble development space was determined to be circa 250 mm. Slug bubbles could be introduced into 14 channels, resulting in six‐fold stronger shear stress than that from single bubbles. Energy demand could be reduced by circa 50% compared with industry average usage and the shear stresses developed would, for most applications, be sufficient to ameliorate fouling. Furthermore, the specific air demand per permeate would be halved. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2721–2736, 2018

中文翻译：

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大型平板MBR的新型曝气：CFD和实验研究

先前已经确定，由块状气泡引入的水动力效应在平板MBR（FSMBR）的结垢改善方面比常规起泡更为有效和经济，因此，这项工作的重点是在商业FSMBR中的实现。总体目标是通过使用两阶段大气泡发展（聚结和裂化）来增强对结垢控制的流体动力学效果。计算流体动力学（CFD）用于预测流体力学特征，并且与实验测量结果基本吻合。气泡产生空间的临界高度确定为约250 mm。块状气泡可引入14个通道，其剪切应力比单个气泡强6倍。与行业平均使用量相比，能源需求可减少约50％，并且在大多数应用中产生的剪切应力将足以减轻结垢。此外，渗透物的特定空气需求量将减半。©2018美国化学工程师学会AIChE J，64：2721–2736，2018年