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Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment

2021-12-03Journal article Open access
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dc.contributor.authorMinhalma, Miguel
dc.contributor.authorDe Pinho, Maria Norberta
dc.contributor.authorDominguez, Joaquin R.
dc.date.accessioned2022-01-26T10:59:56Z
dc.date.available2022-01-26T10:59:56Z
dc.date.issued2021-12-03
dc.description.abstractConcentration polarization and membrane fouling have been identified as the main problems during the ultrafiltration treatment of cork processing wastewaters. These problems drastically reduce the permeate fluxes and, therefore, their potential applications. In this work, a soft ozonation pretreatment was applied to minimize these undesirable effects. A new systematic study was carried out for membranes with different molecular weight cut-offs and at different operating conditions to monitor and quantify the concentration polarization caused by the wastewater's remaining ozonated compounds. Film theory was used to correlate the mass transfer coefficient, k, and the intrinsic rejection coefficient, f ', with the resistance introduced by concentration polarization. The ultrafiltration treatment was carried out under varying hydrodynamic operating conditions (circulating flow rates of 100-200 L/h) and transmembrane pressures (1-3 bar) for a set of four cellulose acetate membranes covering a wide range of molecular weight cut-offs (5000-100,000 Da) and hydraulic permeabilities (25-110 kg/h/m(2)/bar). The ozone pretreatment (at wastewater pH) reduced the phenolic content selectively (direct oxidation) by more than 50%, reducing membrane fouling and concentration polarization and increasing permeate fluxes (by 22-45%) and mass transfer coefficients (up to six times).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMINHALMA, Miguel; PINHO, Maria Norberta de; DOMINGUEZ, Joaquim R. – Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment. Processes. eISSN 2227-9717. Vol. 9, N.º 12 (2021), pp. 1-10.pt_PT
dc.identifier.doi10.3390/pr9122182pt_PT
dc.identifier.eissn2227-9717
dc.identifier.urihttp://hdl.handle.net/10400.21/14203
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationI+D+i PID2020-113389RB-I00 - Ministerio de Universidades of Spainpt_PT
dc.relationMCIN/AEI/10.13039/501100011033 - Ministerio de Universidades of Spainpt_PT
dc.relationPRX21/00196 - Ministerio de Universidades of Spainpt_PT
dc.subjectMembrane foulingpt_PT
dc.subjectUltrafiltrationpt_PT
dc.subjectCork process wastewaterpt_PT
dc.subjectPhenolic compoundspt_PT
dc.subjectMass transfer coefficientpt_PT
dc.subjectIntrinsic rejection coefficientpt_PT
dc.titleConcentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatmentpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F04540%2F2013/PT
oaire.citation.endPage10pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleProcessespt_PT
oaire.citation.volume9pt_PT
oaire.fundingStream5876
person.familyNameMinhalma
person.familyNamede Pinho
person.familyNameDominguez
person.givenNameMiguel
person.givenNameMaria Norberta
person.givenNameJoaquin R.
person.identifier2161276
person.identifier807529
person.identifier.ciencia-id5C1D-13E2-201B
person.identifier.ciencia-id8617-E671-C3E7
person.identifier.orcid0000-0002-6770-194X
person.identifier.orcid0000-0002-5339-1784
person.identifier.orcid0000-0002-5651-687X
person.identifier.ridC-3304-2008
person.identifier.ridF-9364-2016
person.identifier.scopus-author-id6506304514
person.identifier.scopus-author-id7005561562
person.identifier.scopus-author-id7202552838
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication82329027-e556-4aa3-ae0f-0141b41d9a4b
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relation.isProjectOfPublication3297f951-302f-4f9a-a77a-f5068533d370
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