Journal article 711 views
Treatment of highly saline brines using a static freeze crystallisation process
DESALINATION AND WATER TREATMENT, Volume: 213, Pages: 1 - 25
Swansea University Authors:
Darren Oatley-Radcliffe , Paul Williams
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DOI (Published version): 10.5004/dwt.2021.26672
Abstract
Pilot and semi-pilot plants using the static freeze crystallisation process were investigated for concentrating reverse osmosis (RO) brines with different salinities. The pilot plant results revealed that the crystallisation experiments (without a sweating process) operating at a temperature of –4°C...
Published in: | DESALINATION AND WATER TREATMENT |
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ISSN: | 1944-3994 1944-3986 |
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Desalination Publications
2021
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URI: | https://cronfa.swan.ac.uk/Record/cronfa56319 |
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2021-03-11T11:41:42.2582622 v2 56319 2021-02-24 Treatment of highly saline brines using a static freeze crystallisation process 6dfb5ec2932455c778a5aa168c18cffd 0000-0003-4116-723X Darren Oatley-Radcliffe Darren Oatley-Radcliffe true false 3ed8f1e5d997e0fcb256fb6501605cec 0000-0003-0511-4659 Paul Williams Paul Williams true false 2021-02-24 CHEG Pilot and semi-pilot plants using the static freeze crystallisation process were investigated for concentrating reverse osmosis (RO) brines with different salinities. The pilot plant results revealed that the crystallisation experiments (without a sweating process) operating at a temperature of –4°C achieved a permeate concentration and water recovery ratio of 3.46 wt.% and 73%, respectively, indicating permeate of near ocean seawater standards. As a result, the treated water can be further desalted by the seawater RO plant. As for the case of concentrated RO brine (9.78 wt.%), a semi-pilot plant using feed stage with and without the sweating process was assessed. Before perform-ing the sweating process, the results showed that the permeate concentration was reduced from 9.78 to 8.40 wt.% by decreasing the cooling rate of the crystallisation process from –0.80 to –0.48°C/ min. For the case of the crystallisation rate of –0.80°C/min with the sweating process, the permeate concentration was reduced from 9.78 to 4.50 wt.% when the crystal mass ratio reached 35.64%. For the case of the crystallisation rate of –0.48°C/min, the permeate salinity was further reduced by the sweating process, where the permeate concentration was lowered from 8.40 to 3.68 wt.% when the crystal mass ratio reached 36.25%. In general, the salt rejection ratio increased whereas the water recovery ratio decreased as the cooling rate, crystal mass ratio, and sweating time increased. Journal Article DESALINATION AND WATER TREATMENT 213 1 25 Desalination Publications 1944-3994 1944-3986 Freeze-melting process, Freezing desalination technologies, Melt crystallisation process, Reverse osmosis (RO) concentrate, RO retentate 1 2 2021 2021-02-01 10.5004/dwt.2021.26672 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2021-03-11T11:41:42.2582622 2021-02-24T15:04:02.4856071 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Mansour Ahmed 1 Darren Oatley-Radcliffe 0000-0003-4116-723X 2 Paul Williams 0000-0003-0511-4659 3 |
title |
Treatment of highly saline brines using a static freeze crystallisation process |
spellingShingle |
Treatment of highly saline brines using a static freeze crystallisation process Darren Oatley-Radcliffe Paul Williams |
title_short |
Treatment of highly saline brines using a static freeze crystallisation process |
title_full |
Treatment of highly saline brines using a static freeze crystallisation process |
title_fullStr |
Treatment of highly saline brines using a static freeze crystallisation process |
title_full_unstemmed |
Treatment of highly saline brines using a static freeze crystallisation process |
title_sort |
Treatment of highly saline brines using a static freeze crystallisation process |
author_id_str_mv |
6dfb5ec2932455c778a5aa168c18cffd 3ed8f1e5d997e0fcb256fb6501605cec |
author_id_fullname_str_mv |
6dfb5ec2932455c778a5aa168c18cffd_***_Darren Oatley-Radcliffe 3ed8f1e5d997e0fcb256fb6501605cec_***_Paul Williams |
author |
Darren Oatley-Radcliffe Paul Williams |
author2 |
Mansour Ahmed Darren Oatley-Radcliffe Paul Williams |
format |
Journal article |
container_title |
DESALINATION AND WATER TREATMENT |
container_volume |
213 |
container_start_page |
1 |
publishDate |
2021 |
institution |
Swansea University |
issn |
1944-3994 1944-3986 |
doi_str_mv |
10.5004/dwt.2021.26672 |
publisher |
Desalination Publications |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
hierarchy_parent_title |
Faculty of Science and Engineering |
department_str |
School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering |
document_store_str |
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description |
Pilot and semi-pilot plants using the static freeze crystallisation process were investigated for concentrating reverse osmosis (RO) brines with different salinities. The pilot plant results revealed that the crystallisation experiments (without a sweating process) operating at a temperature of –4°C achieved a permeate concentration and water recovery ratio of 3.46 wt.% and 73%, respectively, indicating permeate of near ocean seawater standards. As a result, the treated water can be further desalted by the seawater RO plant. As for the case of concentrated RO brine (9.78 wt.%), a semi-pilot plant using feed stage with and without the sweating process was assessed. Before perform-ing the sweating process, the results showed that the permeate concentration was reduced from 9.78 to 8.40 wt.% by decreasing the cooling rate of the crystallisation process from –0.80 to –0.48°C/ min. For the case of the crystallisation rate of –0.80°C/min with the sweating process, the permeate concentration was reduced from 9.78 to 4.50 wt.% when the crystal mass ratio reached 35.64%. For the case of the crystallisation rate of –0.48°C/min, the permeate salinity was further reduced by the sweating process, where the permeate concentration was lowered from 8.40 to 3.68 wt.% when the crystal mass ratio reached 36.25%. In general, the salt rejection ratio increased whereas the water recovery ratio decreased as the cooling rate, crystal mass ratio, and sweating time increased. |
published_date |
2021-02-01T04:11:11Z |
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1763753770538237952 |
score |
11.016235 |