Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate

Simple item page
dc.contributor.advisorRodriguez-Pascual, Marcosen_ZA
dc.contributor.advisorLewis, Alison Emslieen_ZA
dc.contributor.authorPeters, Edward Michaelen_ZA
dc.date.accessioned2015-08-12T04:04:13Z
dc.date.available2015-08-12T04:04:13Z
dc.date.issued2015en_ZA
dc.descriptionIncludes bibliography.en_ZA
dc.description.abstractEutectic 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.en_ZA
dc.identifier.apacitationPeters, E. M. (2015). <i>Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/13706en_ZA
dc.identifier.chicagocitationPeters, Edward Michael. <i>"Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015. http://hdl.handle.net/11427/13706en_ZA
dc.identifier.citationPeters, E. 2015. Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Peters, Edward Michael AB - 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. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate TI - Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate UR - http://hdl.handle.net/11427/13706 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13706
dc.identifier.vancouvercitationPeters EM. Effect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentate. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13706en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleEffect of antiscalants during eutectic freeze crystallization of a reverse osmosis retentateen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_ebe_2015_peters_em.pdf
Size:
1.47 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters