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

doi:10.2166/wst.2012.425

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境工程與科學系(所) > 期刊論文 > Item 310902800/27701

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標題:	Effect of coagulation mechanisms on the fouling and ultrasonic cleaning of PTFE membrane
作者:	Wan, Meng-Wei Morales Futalan, Cybelle Chang, Cheng-Hung Kan, Chi-Chuah
貢獻者:	環境工程與科學系運動管理系
關鍵字:	Charge Neutralization Fractal Dimension Microfiltration Sweep Flocculation Ultrasonic Cleaning
日期:	2012
上傳時間:	2014-03-21 16:18:07 (UTC+8)
出版者:	Iwa Publishing
摘要:	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).
關聯:	Water Science And Technology, 66(11), 2291-2298
显示于类别:	[環境工程與科學系(所)] 期刊論文 [運動管理系] 期刊論文

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