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    標題: Ultrasonic cleaning of polytetrafluoroethylene membrane fouled by natural organic matter
    作者: Kan, Chi-Chuan
    Genuino, Divine Angela D.
    Rivera, Kim Katrina P.
    de Luna, Mark Daniel G.
    貢獻者: 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
    關鍵字: Membrane fouling
    Natural organic matter
    PTFE membrane
    Coagulation
    Ultrasonic cleaning
    mechanisms
    日期: 2016-01
    上傳時間: 2018-01-18 11:40:05 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: 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.
    關聯: Journal of Membrane Science, v.497, pp.450-457
    顯示於類別:[觀光事業管理系(含溫泉所)] 期刊論文

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