Ultrasonic cleaning of polytetrafluoroethylene membrane fouled by natural organic matter

doi:10.1016/j.memsci.2015.08.031

CNU IR > College of Sustainable Environment and Recreation > Dept. of Tourism Management > Periodical Articles > Item 310902800/31025

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/31025

Title:	Ultrasonic cleaning of polytetrafluoroethylene membrane fouled by natural organic matter
Authors:	Kan, Chi-Chuan Genuino, Divine Angela D. Rivera, Kim Katrina P. de Luna, Mark Daniel G.
Contributors:	Chia Nan Univ Pharm & Sci, Inst Hot Spring Ind Univ Philippines, Environm Engn Program, Natl Grad Sch Engn Univ Philippines, Dept Chem Engn, Quezon City
Keywords:	Membrane fouling Natural organic matter PTFE membrane Coagulation Ultrasonic cleaning mechanisms
Date:	2016-01
Issue Date:	2018-01-18 11:40:05 (UTC+8)
Publisher:	Elsevier Science Bv
Abstract:	Chemical cleaning of membranes fouled by natural organic matter (NOM) generates secondary pollution. In this study, the effect of ultrasonic cleaning of polytetrafluoroethylene (PTFE) membrane fouled by pre-coagulated humic acid-bentonite mixture was investigated. Results show that chemical coagulation prior to microfiltration improved turbidity and TSS removals by 9.5% and 11.4%, respectively. Experimental data fitted to constant pressure filtration models determined the sequence of dominant fouling mechanism as follows: (i) membrane resistance-limited, (ii) pore blocking resistance-limited, and (iii) cake formation resistance-limited. Relative membrane permeability of 53 and flux recovery of 45% were achieved when continuous ultrasonic cleaning was done at a 2.0 cm probe distance, 25 min total cleaning time, 15 mg/L coagulant dose, and 15 W ultrasonic power. Ultrasonic cleaning was found to be more effective than hydraulic cleaning in terms of flux recovery. Compared to chemical cleaning, it is a competitive and safer alternative in mitigating NOM-induced fouling. (C) 2015 Elsevier B.V. All rights reserved.
Relation:	Journal of Membrane Science, v.497, pp.450-457
Appears in Collections:	[Dept. of Tourism Management] Periodical Articles

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	1432	View/Open

Loading...