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Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater

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dc.contributor.authorFerraro, Vincenza
dc.contributor.authorCruz, Isabel B.
dc.contributor.authorJorge, Ruben Ferreira
dc.contributor.authorPintado, Manuela E.
dc.contributor.authorCastro, Paula M. L.
dc.date.accessioned2012-02-27T16:37:11Z
dc.date.available2012-02-27T16:37:11Z
dc.date.issued2011
dc.description.abstractCodfish is worldwide mostly consumed salt-cured due to the highly appreciated sensory characteristics promoted by salt. During the salting process huge amounts of salted wastewater are generated – approximately 22% w/w of the codfish – carrying ca. 250 g/L of sodium chloride and ca. 10 g/L of organic compounds, namely proteins and free amino acids. In this study, the salt load of wastewater generated during the salting process of codfish (Gadus morhua) was successfully reduced by ethanol extraction. The effects of time, sample:ethanol ratio, pH and temperature on salt extraction by ethanol addition were assessed by a onevariable-at-a-time approach and then by performing a 32 fractional factorial design. The effects of pH were also assessed in absence of ethanol. The maximum amount of salt precipitated in the wastewater was ca. 33%, at a wastewater-ethanol ratio 1:1 (v/v), at a temperature of 0 °C and after 30 min. Proteins and free amino acids present in the wastewater significantly limited salt precipitation; in a blank solution (salt in water at ca. 250 g/L) a higher amount of salt, ca. 37%, was precipitated in the same conditions. Ethanol and temperature showed a linear effect on salt precipitation for both wastewater and blank solution however ethanol was the driving factor. Changes in pH did not result in salt precipitation either in absence or presence of ethanol. During salt extraction, no precipitation of free amino acids occurred in the wastewater while ca. 1.4% of protein fell into the precipitated phase along with the salt.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationFERRARO, Vincenza... [et al.] - Solvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewater. Desalination. ISSN 0011-9164. Vol. 281, n.º 17 (2011), p. 42-48por
dc.identifier.doi10.1016/j.desal.2011.07.038
dc.identifier.urihttp://hdl.handle.net/10400.14/7967
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectSalting wastewaterpor
dc.subjectCodfishpor
dc.subjectFree amino acidspor
dc.subjectProteinpor
dc.subjectSalt extractionpor
dc.subjectSolvent extractionpor
dc.titleSolvent extraction of sodium chloride from codfish (Gadus morhua) salting processing wastewaterpor
dc.typejournal article
dspace.entity.typePublication
person.familyNameFerraro
person.familyNamePintado
person.familyNameCastro
person.givenNameVincenza
person.givenNameMaria Manuela
person.givenNamePaula
person.identifier263033
person.identifier456608
person.identifier2013444
person.identifier.ciencia-id2F13-AAE0-3405
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0003-4815-0297
person.identifier.orcid0000-0002-0760-3184
person.identifier.orcid0000-0001-8841-6606
person.identifier.ridK-8153-2014
person.identifier.ridF-5696-2013
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id36450563900
person.identifier.scopus-author-id7004483898
person.identifier.scopus-author-id7102781782
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationf9e0e607-3e30-48eb-84fa-fea82ca62cbc
relation.isAuthorOfPublicationba387c7d-27c9-4016-895c-b35597e91ebc
relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isAuthorOfPublication.latestForDiscoveryba387c7d-27c9-4016-895c-b35597e91ebc

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