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dc.contributor.advisorSnyder, Shane A.en
dc.contributor.authorAzadi Aghdam, Mojtaba
dc.creatorAzadi Aghdam, Mojtabaen
dc.date.accessioned2016-06-17T17:34:39Z
dc.date.available2016-06-17T17:34:39Z
dc.date.issued2016
dc.identifier.urihttp://hdl.handle.net/10150/613571
dc.description.abstractThis research developed a three-step demineralization process for removing scale-forming compounds from brine solutions produced during nanofiltration (NF) of potable water. The process is designed to remove compounds that would produce scale and membrane fouling during further treatment via NF or reverse osmosis (RO). Jar tests were performed to determine the most suitable dosages and mixing times for each reagent. The first step in the demineralization process employs ferric chloride for removing phosphonate scale inhibitors via co-precipitation with ferric hydroxide. The second step of the process increases the solution pH value to promote carbonate mineral precipitation. The third step involves barium sulfate precipitation promoted by barite seed crystals. Saturation indices for precipitation of mineral solids were simulated using the PHREEQC thermodynamic modeling program. Water recovery from the treated brines was modeled using the ROSA package for simulating permeate and concentrate compositions for NF processes. The three-step demineralization process allowed the recovery rate for the brine solution to be as high as the initial feed water, and achieved a total water recovery of > 97%.
dc.language.isoen_USen
dc.publisherThe University of Arizona.en
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en
dc.subjecthigher recoveriesen
dc.subjectmembranesen
dc.subjectwater treatmenten
dc.subjectEnvironmental Engineeringen
dc.subjectBrine precipitationen
dc.titleA Novel Brine Precipitation Process with the Aim of Higher Permeate Water Recoveryen_US
dc.typetexten
dc.typeElectronic Thesisen
thesis.degree.grantorUniversity of Arizonaen
thesis.degree.levelmastersen
dc.contributor.committeememberArnold, Roberten
dc.contributor.committeememberFarrell, Jimen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineEnvironmental Engineeringen
thesis.degree.nameM.S.en
refterms.dateFOA2018-09-11T13:24:46Z
html.description.abstractThis research developed a three-step demineralization process for removing scale-forming compounds from brine solutions produced during nanofiltration (NF) of potable water. The process is designed to remove compounds that would produce scale and membrane fouling during further treatment via NF or reverse osmosis (RO). Jar tests were performed to determine the most suitable dosages and mixing times for each reagent. The first step in the demineralization process employs ferric chloride for removing phosphonate scale inhibitors via co-precipitation with ferric hydroxide. The second step of the process increases the solution pH value to promote carbonate mineral precipitation. The third step involves barium sulfate precipitation promoted by barite seed crystals. Saturation indices for precipitation of mineral solids were simulated using the PHREEQC thermodynamic modeling program. Water recovery from the treated brines was modeled using the ROSA package for simulating permeate and concentrate compositions for NF processes. The three-step demineralization process allowed the recovery rate for the brine solution to be as high as the initial feed water, and achieved a total water recovery of > 97%.


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