A Novel Brine Precipitation Process with the Aim of Higher Permeate Water Recovery

Persistent Link:
http://hdl.handle.net/10150/613571
Title:
A Novel Brine Precipitation Process with the Aim of Higher Permeate Water Recovery
Author:
Azadi Aghdam, Mojtaba
Issue Date:
2016
Publisher:
The University of Arizona.
Rights:
Copyright © 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.
Abstract:
This 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%.
Type:
text; Electronic Thesis
Keywords:
higher recoveries; membranes; water treatment; Environmental Engineering; Brine precipitation
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Environmental Engineering
Degree Grantor:
University of Arizona
Advisor:
Snyder, Shane A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleA Novel Brine Precipitation Process with the Aim of Higher Permeate Water Recoveryen_US
dc.creatorAzadi Aghdam, Mojtabaen
dc.contributor.authorAzadi Aghdam, Mojtabaen
dc.date.issued2016-
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.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%.en
dc.typetexten
dc.typeElectronic Thesisen
dc.subjecthigher recoveriesen
dc.subjectmembranesen
dc.subjectwater treatmenten
dc.subjectEnvironmental Engineeringen
dc.subjectBrine precipitationen
thesis.degree.nameM.S.en
thesis.degree.levelmastersen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineEnvironmental Engineeringen
thesis.degree.grantorUniversity of Arizonaen
dc.contributor.advisorSnyder, Shane A.en
dc.contributor.committeememberArnold, Roberten
dc.contributor.committeememberFarrell, Jimen
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