Improved ultrasonic cleaning of membranes with tandem frequency excitation
In water purification membrane fouling is the most common problem that decresases efficiency in the purification process. In this work we propose a simple method to remove the particles deposited on the membrane surface by applying two different ultrasound frequencies in tandem. First a high ultraso...
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sg-ntu-dr.10356-985392020-03-07T11:43:45Z Improved ultrasonic cleaning of membranes with tandem frequency excitation Gonzalez-Avila, Silvestre Roberto Prabowo, Firdaus Kumar, Anshuman Ohl, Claus-Dieter School of Civil and Environmental Engineering School of Physical and Mathematical Sciences In water purification membrane fouling is the most common problem that decresases efficiency in the purification process. In this work we propose a simple method to remove the particles deposited on the membrane surface by applying two different ultrasound frequencies in tandem. First a high ultrasound frequency, here 220 kHz, is used to create microscopic bubbles that are immediately after excited with a lower ultrasound frequency, e.g., 28 kHz. High speed video of the bare membrane shows the higher number of bubbles after the application of the high ultrasound frequency, as opposed to applying only a low ultrasound frequency. The method is then evaluated by recording the flux delivered and the transmembrane pressure (TMP) in this small scale experiment. The results show that after the application of the tandem frequency the transmembrane pressure is restored to the value of the non fouled membrane. 2013-09-24T07:29:56Z 2019-12-06T19:56:38Z 2013-09-24T07:29:56Z 2019-12-06T19:56:38Z 2012 2012 Journal Article Gonzalez-Avila, S. R., Prabowo, F., Kumar, A.,& Ohl, C. D. (2012). Improved ultrasonic cleaning of membranes with tandem frequency excitation. Journal of Membrane Science, 415-416776-783. https://hdl.handle.net/10356/98539 http://hdl.handle.net/10220/13659 10.1016/j.memsci.2012.05.069 en Journal of membrane science |
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In water purification membrane fouling is the most common problem that decresases efficiency in the purification process. In this work we propose a simple method to remove the particles deposited on the membrane surface by applying two different ultrasound frequencies in tandem. First a high ultrasound frequency, here 220 kHz, is used to create microscopic bubbles that are immediately after excited with a lower ultrasound frequency, e.g., 28 kHz. High speed video of the bare membrane shows the higher number of bubbles after the application of the high ultrasound frequency, as opposed to applying only a low ultrasound frequency. The method is then evaluated by recording the flux delivered and the transmembrane pressure (TMP) in this small scale experiment. The results show that after the application of the tandem frequency the transmembrane pressure is restored to the value of the non fouled membrane. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Gonzalez-Avila, Silvestre Roberto Prabowo, Firdaus Kumar, Anshuman Ohl, Claus-Dieter |
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Gonzalez-Avila, Silvestre Roberto Prabowo, Firdaus Kumar, Anshuman Ohl, Claus-Dieter |
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Gonzalez-Avila, Silvestre Roberto Prabowo, Firdaus Kumar, Anshuman Ohl, Claus-Dieter Improved ultrasonic cleaning of membranes with tandem frequency excitation |
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Gonzalez-Avila, Silvestre Roberto |
title |
Improved ultrasonic cleaning of membranes with tandem frequency excitation |
title_short |
Improved ultrasonic cleaning of membranes with tandem frequency excitation |
title_full |
Improved ultrasonic cleaning of membranes with tandem frequency excitation |
title_fullStr |
Improved ultrasonic cleaning of membranes with tandem frequency excitation |
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Improved ultrasonic cleaning of membranes with tandem frequency excitation |
title_sort |
improved ultrasonic cleaning of membranes with tandem frequency excitation |
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2013 |
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https://hdl.handle.net/10356/98539 http://hdl.handle.net/10220/13659 |
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