Developments in vibrating membrane filtration systems

The present work systematically reviewed vibrating membrane systems as a measure of fouling control. Frequency and amplitude of vibration, membrane pore size, stacking density of membrane modules and viscosity of filtrates are key operational parameters affecting shear rate. The critical flux of vibrating membrane systems is mainly dependent on frequency and amplitude of vibration, size of foulants, as well as the addition of coagulants. Computational fluid dynamics (CFD) is the most popular simulation tool for the mechanic study of membrane vibration. Vibrating membrane systems have been widely applied in microalgae harvesting, wastewater treatment, dairy production and protein separation from yeast, where advanced forms of vibration, such as magnetic induced membrane vibration system (MMV) and uniform shear vibration membrane system (USVM) are developed to meet the needs of the respective applications. PMMA, ETFE, PPO and FEP are qualified and may be used as vibrating membrane materials in the future.