Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method

Water scarcity is a growing problem in many regions around the world and Singapore is not excluded. To help curb this issue, many technologies and methods have been developed and implemented. Recent developments and studies have identified forward osmosis (FO) process as a robust and viable technolo...

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Main Author: Wu, Zong Tang.
Other Authors: Yang Chun, Charles
Format: Final Year Project
Language:English
Published: 2011
Subjects:
Online Access:http://hdl.handle.net/10356/44907
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-449072023-03-04T18:48:58Z Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method Wu, Zong Tang. Yang Chun, Charles School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering Water scarcity is a growing problem in many regions around the world and Singapore is not excluded. To help curb this issue, many technologies and methods have been developed and implemented. Recent developments and studies have identified forward osmosis (FO) process as a robust and viable technology for water desalination due to its high water recovery rate, high contaminants rejection and lower energy requirement as compared to current RO desalination process. However, a much lower flux is obtained over time because of the concentration polarization effect in a FO process.To lower this concentration polarization effect, two methods of enhancement based on previous study were implemented on FO membranes to identify their repeatability and compatibility when they are implemented together. One method involved the use of zwitterionic dimethylethylethylammoniumpropane sulfonate (DMAPS) to modify hydrophilicity of the FO membranes. The other method includes the incorporation of Piezolectric Zirconate Titanate (PZT) unit on FO membrane to lower the concentration polarization effect. These project experiments were carried out in continuous process at different NaCl draw concentrations and at optimum settings / conditions that was identified by previous study. Bachelor of Engineering (Mechanical Engineering) 2011-06-07T01:09:50Z 2011-06-07T01:09:50Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/44907 en Nanyang Technological University 99 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::Mechanical engineering
spellingShingle DRNTU::Engineering::Mechanical engineering
Wu, Zong Tang.
Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
description Water scarcity is a growing problem in many regions around the world and Singapore is not excluded. To help curb this issue, many technologies and methods have been developed and implemented. Recent developments and studies have identified forward osmosis (FO) process as a robust and viable technology for water desalination due to its high water recovery rate, high contaminants rejection and lower energy requirement as compared to current RO desalination process. However, a much lower flux is obtained over time because of the concentration polarization effect in a FO process.To lower this concentration polarization effect, two methods of enhancement based on previous study were implemented on FO membranes to identify their repeatability and compatibility when they are implemented together. One method involved the use of zwitterionic dimethylethylethylammoniumpropane sulfonate (DMAPS) to modify hydrophilicity of the FO membranes. The other method includes the incorporation of Piezolectric Zirconate Titanate (PZT) unit on FO membrane to lower the concentration polarization effect. These project experiments were carried out in continuous process at different NaCl draw concentrations and at optimum settings / conditions that was identified by previous study.
author2 Yang Chun, Charles
author_facet Yang Chun, Charles
Wu, Zong Tang.
format Final Year Project
author Wu, Zong Tang.
author_sort Wu, Zong Tang.
title Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
title_short Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
title_full Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
title_fullStr Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
title_full_unstemmed Improvement of forward osmosis flux performance using combined piezoelectric and DMAPS surface treatment method
title_sort improvement of forward osmosis flux performance using combined piezoelectric and dmaps surface treatment method
publishDate 2011
url http://hdl.handle.net/10356/44907
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