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首页> 外文期刊>Separation and Purification Technology >Intensification of membrane microfiltration using oscillatory motion
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Intensification of membrane microfiltration using oscillatory motion

机译：使用振荡运动强化膜微滤

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Mass transfer limitations at solid liquid interfaces caused by surface fouling and concentration polarization are the main reasons for limiting the performance of many membrane separation processes. In this investigation, intensification of membrane microfiltration was accomplished by oscillating the membrane along its surface at moderate frequencies (<25 Hz) and low amplitudes (<0.03 m) while maintaining constant transmembrane pressure using a feedback control scheme. The enhanced oscillatory shear generated at the membrane fluid interface resulted in a continuous de-fouling of the membrane surface leading to significant improvement in microfiltration performance. Increasing oscillation frequency was found to have stronger effect on increasing filtration flux than its amplitude. Approximately three folds increase in filtration flux was achieved using the above approach. Correlation of the flux to the oscillation frequency and amplitude was developed (R~2 =0.98) and the results were compared with both dynamic as well as conventional cross flow filtration techniques.
机译：由表面结垢和浓差极化引起的固液界面传质限制是限制许多膜分离工艺性能的主要原因。在这项研究中，通过以中频（<25 Hz）和低振幅（<0.03 m）使膜沿其表面振荡，同时使用反馈控制方案保持恒定的跨膜压力来完成膜微滤的强化。在膜流体界面处产生的增强的振荡剪切导致膜表面的连续除垢，从而导致微滤性能的显着改善。发现增加振荡频率对增加过滤通量的影响大于幅度。使用上述方法可使过滤通量增加约三倍。建立了磁通量与振荡频率和振幅的相关性（R〜2 = 0.98），并将结果与​​动态和常规错流过滤技术进行了比较。

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