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Optimal Intermittent Ultrasound-assisted Ultrafiltration for Membrane Fouling Remediation by Mohammed Al-Hasani; Huu Doan; Ning Zhu; Amira Abdelrasoul is a Engineering article available to read on EtoBox.

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One of the most critical issues encountered in membrane-based separation processes is the permeate flux decline over a long period of operation. This study considered the potential advantages of applying intermittent ultrasound (US) to the ultrafiltration (UF) processes to control long term membrane fouling. The particles in the feed solution tend to attach to the membrane's internal pores and accumulate on the membrane surface, which impedes the filtration process and limits separation efficiency and significantly increases the power consumption. US-generated microbubbles create local turbulence and shear effect near the membrane surface, which disrupt the concentration polarization and fouling layer, resulting in flux improvement. In this regard, remediation of ceramic membrane fouling by an in-line intermittent US system was investigated. Bubble generation under different frequencies (20 kHz, 28 kHz, and 40 kHz), power intensities (50 W, 60 W, and 100 W) and time intervals were evaluated to determine the optimal US condition for enhanced filtration. A real time in-situ imaging of US-generated bubbles was employed, using a synchrotron propagation-based imaging (PBI) at the Canadi

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Author

Mohammed Al-Hasani; Huu Doan; Ning Zhu; Amira Abdelrasoul

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)