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dc.contributor.authorMartínez Díaz, Raquel
dc.contributor.authorRuiz Pérez, María Olga 
dc.contributor.authorRamos Rodríguez, Cipriano 
dc.contributor.authorCámara Nebreda, José María 
dc.contributor.authorDiez Blanco, Victorino 
dc.date.accessioned2021-11-23T08:24:40Z
dc.date.available2021-11-23T08:24:40Z
dc.date.issued2021-12
dc.identifier.issn0959-6526
dc.identifier.urihttp://hdl.handle.net/10259/6205
dc.description.abstractThe response surface methodology has been applied to study reversible and irreversible fouling rates caused by anaerobic sludge in membrane bioreactors, with the aim of controlling membrane fouling by adjusting filtration conditions. The challenge of obtaining statistically significant results of long-term fouling by means of mid-term assays has been addressed. The individual and combined effects of the filtration flux, backwashing intensity, gas sparging and crossflow velocity on membrane fouling, were analyzed in two types of membranes: an external tubular membrane and a submerged hollow fiber membrane. In the external membrane, the reversible fouling rate was as low as 0.27 ± 0.10 mbar/min, depending mainly on the filtration flux and gas sparging. However, the principal control parameter of the irreversible fouling rate was the crossflow velocity, reaching 2.12 ± 1.75 1012 m−2 in terms of increase of resistance per cubic meter filtered by square meter of membrane. In the submerged membrane, the irreversible fouling rate was quite lower, 0.78 ± 0.40 mbar/d, despite the reversible fouling rate was higher, 1.26 ± 0.42 mbar/min. In this case, the irreversible fouling depended mainly on the backwashing frequency despite the reversible fouling was more affected by the filtration flux and gas sparging. Hence, the approach used to control the reversible fouling rate does not involve mitigating irreversible fouling on both submerged and external membranes. This study provides a methodological basis for the selection of site-specific operating conditions, under which sustainable operation of membrane bioreactors could be achieved.en
dc.description.sponsorshipTCUE 2018–2020 cofounded by European Regional Development Fund (ERDF) and Junta de Castilla y León (Spain) and the inestimable collaboration of Campofrío Frescos and Grupo Ecoalia.en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieres
dc.relation.ispartofJournal of Cleaner Production. 2021, V. 326, 129336en
dc.rightsAtribución 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectMembrane bioreactorsen
dc.subjectExternal membraneen
dc.subjectSubmerged membraneen
dc.subjectReversible and irreversible fouling ratesen
dc.subjectBox-behnken experimental designen
dc.subject.otherIngeniería químicaes
dc.subject.otherChemical engineeringen
dc.titleFouling control of submerged and side-stream membrane bioreactors based on the statistical analysis of mid-term assaysen
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1016/j.jclepro.2021.129336es
dc.identifier.doi10.1016/j.jclepro.2021.129336
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones


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