Analysis of salt accumulation in a forward osmosis system
An important issue concerning performance of forward osmosis (FO) systems is salt accumulation in the retentate. This occurs due to the highly retentive FO membrane and reverse diffusion of draw solutes. In this study, experimental data from an osmotic membrane bioreactor (OMBR), which epitomizes a...
Saved in:
Main Authors: | , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/97586 http://hdl.handle.net/10220/12103 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-97586 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-975862020-03-07T11:43:45Z Analysis of salt accumulation in a forward osmosis system Lay, Winson Chee Loong Zhang, Jinsong Tang, Chuyang Y. Wang, Rong Liu, Yu Fane, Anthony Gordon School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering An important issue concerning performance of forward osmosis (FO) systems is salt accumulation in the retentate. This occurs due to the highly retentive FO membrane and reverse diffusion of draw solutes. In this study, experimental data from an osmotic membrane bioreactor (OMBR), which epitomizes a challenging application for FO, was analyzed to investigate longer term effects of the above issue. It was found that salt accumulation is controlled by three factors: membrane, influent, and process. The role of the membrane is application-dependent and significant only when influent osmotic pressure is smaller or in the same order of magnitude as the salt to water permeability ratio (B/A). The study also shows that an experimental duration of 3 × solids retention time (SRT) is necessary for adequate study of salt accumulation in FO systems. Analysis of the B/A ratio provided fundamental information into system behavior. A reducing B/A could be associated with the formation of a mild secondary foulant layer, whereas an increasing B/A was observed for more severe fouling cases and indicated further flux reducing mechanisms. The study makes clear that knowledge of factors affecting salt accumulation is essential for optimization of FO systems. 2013-07-24T06:01:25Z 2019-12-06T19:44:20Z 2013-07-24T06:01:25Z 2019-12-06T19:44:20Z 2012 2012 Journal Article Lay, W. C. L., Zhang, J., Tang, C., Wang, R., Liu, Y., & Fane, A. G. (2012). Analysis of Salt Accumulation in a Forward Osmosis System. Separation Science and Technology, 47(13), 1837-1848. 0149-6395 https://hdl.handle.net/10356/97586 http://hdl.handle.net/10220/12103 10.1080/01496395.2012.692423 en Separation science and technology © 2012 Taylor & Francis Group, LLC. |
institution |
Nanyang Technological University |
building |
NTU Library |
country |
Singapore |
collection |
DR-NTU |
language |
English |
topic |
DRNTU::Engineering::Environmental engineering |
spellingShingle |
DRNTU::Engineering::Environmental engineering Lay, Winson Chee Loong Zhang, Jinsong Tang, Chuyang Y. Wang, Rong Liu, Yu Fane, Anthony Gordon Analysis of salt accumulation in a forward osmosis system |
description |
An important issue concerning performance of forward osmosis (FO) systems is salt accumulation in the retentate. This occurs due to the highly retentive FO membrane and reverse diffusion of draw solutes. In this study, experimental data from an osmotic membrane bioreactor (OMBR), which epitomizes a challenging application for FO, was analyzed to investigate longer term effects of the above issue. It was found that salt accumulation is controlled by three factors: membrane, influent, and process. The role of the membrane is application-dependent and significant only when influent osmotic pressure is smaller or in the same order of magnitude as the salt to water permeability ratio (B/A). The study also shows that an experimental duration of 3 × solids retention time (SRT) is necessary for adequate study of salt accumulation in FO systems. Analysis of the B/A ratio provided fundamental information into system behavior. A reducing B/A could be associated with the formation of a mild secondary foulant layer, whereas an increasing B/A was observed for more severe fouling cases and indicated further flux reducing mechanisms. The study makes clear that knowledge of factors affecting salt accumulation is essential for optimization of FO systems. |
author2 |
School of Civil and Environmental Engineering |
author_facet |
School of Civil and Environmental Engineering Lay, Winson Chee Loong Zhang, Jinsong Tang, Chuyang Y. Wang, Rong Liu, Yu Fane, Anthony Gordon |
format |
Article |
author |
Lay, Winson Chee Loong Zhang, Jinsong Tang, Chuyang Y. Wang, Rong Liu, Yu Fane, Anthony Gordon |
author_sort |
Lay, Winson Chee Loong |
title |
Analysis of salt accumulation in a forward osmosis system |
title_short |
Analysis of salt accumulation in a forward osmosis system |
title_full |
Analysis of salt accumulation in a forward osmosis system |
title_fullStr |
Analysis of salt accumulation in a forward osmosis system |
title_full_unstemmed |
Analysis of salt accumulation in a forward osmosis system |
title_sort |
analysis of salt accumulation in a forward osmosis system |
publishDate |
2013 |
url |
https://hdl.handle.net/10356/97586 http://hdl.handle.net/10220/12103 |
_version_ |
1681038705816502272 |