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Treatment of highly saline brines using a static freeze crystallisation process

Mansour Ahmed, Darren Oatley-Radcliffe Orcid Logo, Paul Williams Orcid Logo

DESALINATION AND WATER TREATMENT, Volume: 213, Pages: 1 - 25

Swansea University Authors: Darren Oatley-Radcliffe Orcid Logo, Paul Williams Orcid Logo

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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...

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Published in: DESALINATION AND WATER TREATMENT
ISSN: 1944-3994 1944-3986
Published: Desalination Publications 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56319
first_indexed 2021-02-24T15:06:03Z
last_indexed 2021-03-12T04:20:16Z
id cronfa56319
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spelling 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 EAAS 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 Engineering and Applied Sciences School COLLEGE CODE EAAS 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
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id 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 0
active_str 0
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 2021-02-01T04:49:58Z
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score 11.089988

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