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Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate
Includes bibliography.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Chemical Engineering
2015
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| _version_ | 1867613182497914881 |
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| access_status_str | Open Access |
| author | Peters, Edward Michael |
| author2 | Rodriguez-Pascual, Marcos |
| author_browse | Peters, Edward Michael Rodriguez-Pascual, Marcos |
| author_facet | Rodriguez-Pascual, Marcos Peters, Edward Michael |
| author_sort | Peters, Edward Michael |
| collection | Thesis |
| description | Includes bibliography. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13706 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:05.102Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Chemical Engineering |
| publisherStr | Department of Chemical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/13706 Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate Peters, Edward Michael Rodriguez-Pascual, Marcos Lewis, Alison Emslie Chemical Engineering Includes bibliography. Eutectic Freeze Crystallization (EFC) is a separation technique which involves simultaneous crystallization of water and solute under eutectic conditions. It can be applied to treatment of various industrial aqueous streams containing dissolved organic and inorganic contaminants, such as reverse osmosis (RO) retentate brine streams. Since antiscalants are dosed in RO feed streams, these become concentrated in the retentate brine stream and could have an undesirable effect on crystallization kinetics of both ice and salt in EFC. In this study, the impact of a phosphonate antiscalant on the kinetic processes of nucleation and growth in EFC was investigated. Firstly, the effect of an antiscalant on the thermodynamic phase equilibria of a binary Na2SO4 aqueous solution was experimentally determined. The effect of the antiscalant on the nucleation and growth rates of both ice and salt in a continuous EFC process was then established for concentrations of 200, 350 and 500 mg/L of antiscalant. Product quality parameters such as the Crystal Size Distribution (CSD), morphology and purity of crystals were also measured since they are directly affected by the kinetic rate processes investigated. 2015-08-12T04:04:13Z 2015-08-12T04:04:13Z 2015 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/13706 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Chemical Engineering Peters, Edward Michael Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| thesis_degree_str | Master's |
| title | Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| title_full | Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| title_fullStr | Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| title_full_unstemmed | Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| title_short | Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| title_sort | effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate |
| topic | Chemical Engineering |
| url | http://hdl.handle.net/11427/13706 |
| work_keys_str_mv | AT petersedwardmichael effectofantiscalantsduringeutecticfreezecrystallizationofareverseosmosisretentate |