Effect of coagulation mechanisms on the fouling and ultrasonic cleaning of PTFE membrane

doi:10.2166/wst.2012.425

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/27701

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/27701

Title:	Effect of coagulation mechanisms on the fouling and ultrasonic cleaning of PTFE membrane
Authors:	Wan, Meng-Wei Morales Futalan, Cybelle Chang, Cheng-Hung Kan, Chi-Chuah
Contributors:	環境工程與科學系運動管理系
Keywords:	Charge Neutralization Fractal Dimension Microfiltration Sweep Flocculation Ultrasonic Cleaning
Date:	2012
Issue Date:	2014-03-21 16:18:07 (UTC+8)
Publisher:	Iwa Publishing
Abstract:	In this study, the effect of coagulation pretreatment on membrane fouling and ultrasonic cleaning efficiency was investigated using a dead-end polytetrafluoroethylene (PTFE) microfiltration system. The extent of membrane fouling was examined under different coagulation mechanisms such as charge neutralization (CN), electrostatic patch effect (EPE) and sweep flocculation (SW). Fouling through EPE mechanism provided the greatest flux decline and least permeate flux recovery over CN and SW. EPE produces more stable, smaller and more compact flocs while CN and SW have large, easily degraded and highly-branched structured flocs. The predominant fouling mechanism of EPE, CN and SW is pore blocking, a combination of pore blocking and cake formation, and cake formation, respectively. Better permeate flux recovery is observed with SW over CN and EPE, which implies formation of less dense and more porous cake deposits. The morphology of fouled membranes was examined using scanning electron microscopy (SEM).
Relation:	Water Science And Technology, 66(11), 2291-2298
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles [Dept. of Sports Management] Periodical Articles

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