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Toxicity reduction and biodegradability enhancement of cork processing wastewaters by ozonation

2013-10Journal article Open access
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dc.contributor.authorGomes, A.C.
dc.contributor.authorSilva, Lúcia
dc.contributor.authorSimões, Rogério
dc.contributor.authorCanto, N.
dc.contributor.authorAlbuquerque, Antonio
dc.date.accessioned2014-06-30T18:04:54Z
dc.date.available2014-06-30T18:04:54Z
dc.date.issued2013-10
dc.description.abstractBiodegradability enhancement and detoxification of cork boiling wastewater (CBW) are required for the successful implementation of biological treatment options. We studied the possibility of achieving these goals through ozonation pre-treatment by experimenting on the effect of ozone dose and pH. The CBW used had a pH of 5.81, a chemical oxygen demand (COD) of 1,865 mg L-1, a biochemical oxygen demand (BOD5) of 498 mg L-1 and total phenol (TP) and tannin compounds concentrations of 523 and 399 mg L-1, respectively. The ozone doses ranged from 0.27 to 2.63 for the O-3(applied)/COD0 ratios with samples at natural pH and set to 3.33 and 9.96. Ozonation allowed the BOD20/COD ratio (biodegradability index) to increase from 0.37 to 0.63 and a toxicity reduction from 3.08 to 1.24 TU (Microtox). The corresponding removals obtained were 15.2-62.0%, 38.4-83.2% and 56.7-92.1% for COD, TP and colour, respectively. The best outcome of ozonation pre-treatment requires O-3(applied)/COD0 ratios over 1.5 and an acid pH. The increase of TP removals with ozone dose at acid pH led to biodegradability enhancement and CBW detoxification. However, for similar conditions the highest COD removals were obtained at alkaline pH due to the hydroxyl radicals' high oxidation ability but lack of selectivity.por
dc.identifier.doi10.2166/wst.2013.478
dc.identifier.issn1996-9732
dc.identifier.urihttp://hdl.handle.net/10400.6/1963
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherIWApor
dc.relationIntegrated Treatment of Cork Processing Wastewaters for Potencial Reuse
dc.subjectBiodegradabilitypor
dc.subjectCork wastewaterpor
dc.subjectCortiçapor
dc.subjectTratamento de águas residuaispor
dc.subjectOzonationpor
dc.subjectToxicitypor
dc.titleToxicity reduction and biodegradability enhancement of cork processing wastewaters by ozonationpor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleIntegrated Treatment of Cork Processing Wastewaters for Potencial Reuse
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FAGR-AAM%2F102042%2F2008/PT
oaire.citation.endPage2219por
oaire.citation.issue10por
oaire.citation.startPage2214por
oaire.citation.titleWATER SCIENCE AND TECHNOLOGYpor
oaire.citation.volume68por
oaire.fundingStream5876-PPCDTI
person.familyNameGomes
person.familyNameSilva
person.familyNameSimões
person.familyNameCarvalho de Albuquerque
person.givenNameArlindo
person.givenNameLúcia
person.givenNameRogério Manuel Santos
person.givenNameAntonio João
person.identifier1284649
person.identifier.ciencia-id991F-4518-6FBC
person.identifier.ciencia-id3A16-265B-3678
person.identifier.ciencia-idC61A-FEC7-573C
person.identifier.ciencia-id3319-F1FE-0DA8
person.identifier.orcid0000-0002-1707-9208
person.identifier.orcid0000-0002-7386-0330
person.identifier.orcid0000-0001-8143-1555
person.identifier.orcid0000-0001-7099-0685
person.identifier.ridC-9293-2009
person.identifier.scopus-author-id7202385995
person.identifier.scopus-author-id7202198075
person.identifier.scopus-author-id8892509700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typearticlepor
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