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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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