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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Main Authors: Gonzalez-Avila, Silvestre Roberto, Prabowo, Firdaus, Kumar, Anshuman, Ohl, Claus-Dieter
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/98539
http://hdl.handle.net/10220/13659
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Institution: Nanyang Technological University
Language: English
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spelling 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
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description 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.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Gonzalez-Avila, Silvestre Roberto
Prabowo, Firdaus
Kumar, Anshuman
Ohl, Claus-Dieter
format Article
author Gonzalez-Avila, Silvestre Roberto
Prabowo, Firdaus
Kumar, Anshuman
Ohl, Claus-Dieter
spellingShingle Gonzalez-Avila, Silvestre Roberto
Prabowo, Firdaus
Kumar, Anshuman
Ohl, Claus-Dieter
Improved ultrasonic cleaning of membranes with tandem frequency excitation
author_sort 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
title_full_unstemmed Improved ultrasonic cleaning of membranes with tandem frequency excitation
title_sort improved ultrasonic cleaning of membranes with tandem frequency excitation
publishDate 2013
url https://hdl.handle.net/10356/98539
http://hdl.handle.net/10220/13659
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