Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/14203 |
Resumo: | Concentration 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). |
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Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatmentMembrane foulingUltrafiltrationCork process wastewaterPhenolic compoundsMass transfer coefficientIntrinsic rejection coefficientConcentration 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).MDPIRCIPLMinhalma, MiguelDe Pinho, Maria NorbertaDominguez, Joaquin R.2022-01-26T10:59:56Z2021-12-032021-12-03T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/14203engMINHALMA, 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. 1-10.10.3390/pr91221822227-9717info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:10:03Zoai:repositorio.ipl.pt:10400.21/14203Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:22:03.301740Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
title |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
spellingShingle |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment Minhalma, Miguel Membrane fouling Ultrafiltration Cork process wastewater Phenolic compounds Mass transfer coefficient Intrinsic rejection coefficient |
title_short |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
title_full |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
title_fullStr |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
title_full_unstemmed |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
title_sort |
Concentration polarization quantification and minimization in cork process wastewater ultrafiltration by an ozone pretreatment |
author |
Minhalma, Miguel |
author_facet |
Minhalma, Miguel De Pinho, Maria Norberta Dominguez, Joaquin R. |
author_role |
author |
author2 |
De Pinho, Maria Norberta Dominguez, Joaquin R. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Minhalma, Miguel De Pinho, Maria Norberta Dominguez, Joaquin R. |
dc.subject.por.fl_str_mv |
Membrane fouling Ultrafiltration Cork process wastewater Phenolic compounds Mass transfer coefficient Intrinsic rejection coefficient |
topic |
Membrane fouling Ultrafiltration Cork process wastewater Phenolic compounds Mass transfer coefficient Intrinsic rejection coefficient |
description |
Concentration 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). |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-03 2021-12-03T00:00:00Z 2022-01-26T10:59:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/14203 |
url |
http://hdl.handle.net/10400.21/14203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
MINHALMA, 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. 10.3390/pr9122182 2227-9717 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133491857719296 |