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Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water / SEDAR DOGAN

Swansea University Author: SEDAR DOGAN

DOI (Published version): 10.23889/SUThesis.70131

Abstract

With rising industry standards, the presence of silica in both colloidal and soluble forms presents significant operational challenges in boiler feedwater systems. Silica contributes to scaling, fouling, and corrosion within boilers and turbines, impacting safety, efficiency, and longevity. Effective si...

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Published: Swansea University, Wales, UK 2025
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Tizaoui, C., and Smith, G.
URI: https://cronfa.swan.ac.uk/Record/cronfa70131
first_indexed 2025-08-07T14:13:42Z
last_indexed 2025-08-08T08:51:41Z
id cronfa70131
recordtype RisThesis
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spelling 2025-08-07T15:19:31.6814007 v2 70131 2025-08-07 Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water c537e2329354721ac226114d2f0cd761 SEDAR DOGAN SEDAR DOGAN true false 2025-08-07 With rising industry standards, the presence of silica in both colloidal and soluble forms presents significant operational challenges in boiler feedwater systems. Silica contributes to scaling, fouling, and corrosion within boilers and turbines, impacting safety, efficiency, and longevity. Effective silica removal is crucial to meet stringent water quality standards and protect equipment. This thesis examines the water treatment challenges at Tata Steel Port Talbot, specifically addressing silica-related issues, and evaluates advanced treatment technologies to enhance silica removal.The existing water treatment system at Tata Steel Port Talbot involves surface water intake followed by chemical coagulation, clarification, filtration, and ion exchange. However, despite these measures, conventional methods often fail to adequately control colloidal silica levels. This research seeks to bridge this gap by exploring innovative approaches to silica management, with a focus on reducing silica in boiler feedwater.One area of focus was the assessment of coagulants, comparing traditional coagulants like alum and ferric chloride with novel options, such as titanium and zirconium. Each coagulant’s performance was measured in terms of zeta potential, floc size, and colloidal silica removal efficiency. Results demonstrated that titanium-based coagulants, in particular, formed larger flocs and achieved similar silica removal efficiency (over 72% at 0.93 mg Ti/L) as alum, which was most effective when tested with surface water samples.The thesis also investigates membrane technologies by enhancing polyvinylidene fluoride (PVDF) membranes with multi-walled carbon nanotubes (CNTs) and graphene oxide (GO) fabricated through phase inversion.Hybrid membranes demonstrated significant improvements in both water permeability and flux recovery. Specifically, pure water permeability increased by 141% for GO and 174% for CNT, while flux recovery enhanced by 36% for GO and 42% for CNT, compared to unmodified membranes. E-Thesis Swansea University, Wales, UK Water treatment, Silica, Chemical Engineering. 2 7 2025 2025-07-02 10.23889/SUThesis.70131 A selection of content is redacted or is partially redacted from this thesis to protect sensitive and personal information. COLLEGE NANME COLLEGE CODE Swansea University Tizaoui, C., and Smith, G. Doctoral EngD EPSRC doctoral training grant EPSRC doctoral training grant 2025-08-07T15:19:31.6814007 2025-08-07T14:32:48.6257588 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering SEDAR DOGAN 1 70131__34928__89f5bebd11044725bbec5b645e2b4d4e.pdf 2024_Dogan_S.final.70131.pdf 2025-08-07T15:11:08.7159457 Output 3104976 application/pdf E-Thesis – open access true Copyright: The author, Sedar Dogan, 2024 true eng
title Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
spellingShingle Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
SEDAR DOGAN
title_short Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
title_full Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
title_fullStr Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
title_full_unstemmed Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
title_sort Advanced Clean Water Treatment At Tata Port Talbot: Silica Removal In Water
author_id_str_mv c537e2329354721ac226114d2f0cd761
author_id_fullname_str_mv c537e2329354721ac226114d2f0cd761_***_SEDAR DOGAN
author SEDAR DOGAN
author2 SEDAR DOGAN
format E-Thesis
publishDate 2025
institution Swansea University
doi_str_mv 10.23889/SUThesis.70131
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 - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description With rising industry standards, the presence of silica in both colloidal and soluble forms presents significant operational challenges in boiler feedwater systems. Silica contributes to scaling, fouling, and corrosion within boilers and turbines, impacting safety, efficiency, and longevity. Effective silica removal is crucial to meet stringent water quality standards and protect equipment. This thesis examines the water treatment challenges at Tata Steel Port Talbot, specifically addressing silica-related issues, and evaluates advanced treatment technologies to enhance silica removal.The existing water treatment system at Tata Steel Port Talbot involves surface water intake followed by chemical coagulation, clarification, filtration, and ion exchange. However, despite these measures, conventional methods often fail to adequately control colloidal silica levels. This research seeks to bridge this gap by exploring innovative approaches to silica management, with a focus on reducing silica in boiler feedwater.One area of focus was the assessment of coagulants, comparing traditional coagulants like alum and ferric chloride with novel options, such as titanium and zirconium. Each coagulant’s performance was measured in terms of zeta potential, floc size, and colloidal silica removal efficiency. Results demonstrated that titanium-based coagulants, in particular, formed larger flocs and achieved similar silica removal efficiency (over 72% at 0.93 mg Ti/L) as alum, which was most effective when tested with surface water samples.The thesis also investigates membrane technologies by enhancing polyvinylidene fluoride (PVDF) membranes with multi-walled carbon nanotubes (CNTs) and graphene oxide (GO) fabricated through phase inversion.Hybrid membranes demonstrated significant improvements in both water permeability and flux recovery. Specifically, pure water permeability increased by 141% for GO and 174% for CNT, while flux recovery enhanced by 36% for GO and 42% for CNT, compared to unmodified membranes.
published_date 2025-07-02T18:03:40Z
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score 11.08899

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