Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis

Forward osmosis (FO) is one of the membrane technologies of increasingly importance. Concentration polarization phenomenon exists as a critical problem limiting the application of the membrane separation processes with high performance. Dynamic agitation has been proved to be an effective way in con...

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Main Author: Hoon, Yong Yee.
Other Authors: Tang Chuyang
Format: Final Year Project
Language:English
Published: 2011
Subjects:
Online Access:http://hdl.handle.net/10356/44408
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-444082023-03-03T16:55:40Z Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis Hoon, Yong Yee. Tang Chuyang School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering Forward osmosis (FO) is one of the membrane technologies of increasingly importance. Concentration polarization phenomenon exists as a critical problem limiting the application of the membrane separation processes with high performance. Dynamic agitation has been proved to be an effective way in controlling the polarization during filtration processes. However, most of the conventional approaches are not applicable to the polarization process within the porous structure of the membrane, which is viewed as the internal concentration polarization (ICP). This paper proposes a novel approach to minimizing the internal concentration polarization by exploiting ultrasonic irradiation. Preliminary experimental studies were carried out to validate the effect of the ultrasound on the forward osmosis efficiency. A lab-scale FO testing system was designed with novel features for improving the measurement accuracy. A double layer membrane composed of a commercial FO membrane and an ultra filtration membrane was employed to simulate the case having severe ICP. The irradiation power input was varied from 0 to 80 percent at a frequency of 53 kHz. It was observed that the forward osmosis efficiency was significantly increased with increasing ultrasound power input. The presented experimental studies will provide a basis for developing the system for mitigating the ICP during FO processes with low energy consumption. Bachelor of Engineering (Environmental Engineering) 2011-06-01T06:37:57Z 2011-06-01T06:37:57Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/44408 en Nanyang Technological University 62 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Environmental engineering
spellingShingle DRNTU::Engineering::Environmental engineering
Hoon, Yong Yee.
Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
description Forward osmosis (FO) is one of the membrane technologies of increasingly importance. Concentration polarization phenomenon exists as a critical problem limiting the application of the membrane separation processes with high performance. Dynamic agitation has been proved to be an effective way in controlling the polarization during filtration processes. However, most of the conventional approaches are not applicable to the polarization process within the porous structure of the membrane, which is viewed as the internal concentration polarization (ICP). This paper proposes a novel approach to minimizing the internal concentration polarization by exploiting ultrasonic irradiation. Preliminary experimental studies were carried out to validate the effect of the ultrasound on the forward osmosis efficiency. A lab-scale FO testing system was designed with novel features for improving the measurement accuracy. A double layer membrane composed of a commercial FO membrane and an ultra filtration membrane was employed to simulate the case having severe ICP. The irradiation power input was varied from 0 to 80 percent at a frequency of 53 kHz. It was observed that the forward osmosis efficiency was significantly increased with increasing ultrasound power input. The presented experimental studies will provide a basis for developing the system for mitigating the ICP during FO processes with low energy consumption.
author2 Tang Chuyang
author_facet Tang Chuyang
Hoon, Yong Yee.
format Final Year Project
author Hoon, Yong Yee.
author_sort Hoon, Yong Yee.
title Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
title_short Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
title_full Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
title_fullStr Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
title_full_unstemmed Experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
title_sort experimental studies of the effect of ultrasonic irradiation on internal concentration polarization during forward osmosis
publishDate 2011
url http://hdl.handle.net/10356/44408
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