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Cork processing wastewater treatment/valorisation by nanofiltration

2009-11Journal article Open access
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dc.contributor.authorOliveira, J.
dc.contributor.authorNunes, M.
dc.contributor.authorSantos, P.
dc.contributor.authorCantinho, Paula
dc.contributor.authorMinhalma, Miguel
dc.date.accessioned2012-03-23T16:07:04Z
dc.date.available2012-03-23T16:07:04Z
dc.date.issued2009-11
dc.description.abstractNanofiltration process for the treatment/valorisation of cork processing wastewaters was studied. A DS-5 DK 20/40 (GE Water Technologies) nanofiltration membrane/module was used, having 2.09 m(2) of surface area. Hydraulic permeability was determined with pure water and the result was 5.2 L.h(-1).m(-2).bar(-1). The membrane presents a rejection of 51% and 99% for NaCl and MgSO4 salts, respectively. Two different types of regimes were used in the wastewaters filtration process, total recycling mode and concentration mode. The first filtration regime showed that the most favourable working transmembrane pressure was 7 bar working at 25 degrees C. For the concentration mode experiments it was observed a 30% decline of the permeate fluxes when a volumetric concentration factor of 5 was reached. The permeate COD, BOD5, colour and TOC rejection values remained well above the 90% value, which allows, therefore, the concentration of organic matter (namely the tannin fraction) in the concentrate stream that can be further used by other industries. The permeate characterization showed that it cannot be directly discharged to the environment as it does not fulfil the values of the Portuguese discharge legislation. However, the permeate stream can be recycled to the process (boiling tanks) as it presents no colour and low TOC (< 60 ppm) or if wastewater discharge is envisaged we have observed that the permeate biodegradability is higher than 0.5, which renders conventional wastewater treatments feasible.por
dc.identifier.citationOliveira J, Nunes M, Santos P, Cantinho P, Minhalma P. Cork processing wastewater treatment/valorisation by nanofiltration. Desalination and Water Treatment. 2009; 11 (1-3): 224-228.por
dc.identifier.issn1944-3994
dc.identifier.urihttp://hdl.handle.net/10400.21/1360
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherDesalination Publpor
dc.relation.ispartofseries1-3
dc.subjectCork processing wastewaterpor
dc.subjectNanofiltrationpor
dc.subjectRecyclingpor
dc.subjectEffluent valorisationpor
dc.subjectIntegrated processpor
dc.subjectFentons reagentpor
dc.subjectWastwaterspor
dc.subjectOxidationpor
dc.subjectUltrafiltrationpor
dc.subjectPurificationpor
dc.subjectRemovalpor
dc.subjectAcidpor
dc.titleCork processing wastewater treatment/valorisation by nanofiltrationpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceItalypor
oaire.citation.endPage228por
oaire.citation.issue11por
oaire.citation.startPage224por
oaire.citation.titleDesalination and Water Treatmentpor
person.familyNameMinhalma
person.givenNameMiguel
person.identifier2161276
person.identifier.ciencia-id5C1D-13E2-201B
person.identifier.orcid0000-0002-6770-194X
person.identifier.ridC-3304-2008
person.identifier.scopus-author-id6506304514
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication8ed0648a-758d-4b1d-b364-f8ea7195308f
relation.isAuthorOfPublication.latestForDiscovery8ed0648a-758d-4b1d-b364-f8ea7195308f

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