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Aerobic biological treatment of wastewaters containing dichloromethane

dc.contributor.authorMoura, Sandra C.
dc.contributor.authorJorge, Ruben Ferreira
dc.contributor.authorDuque, Anouk
dc.contributor.authorBoaventura, Rui A.R
dc.contributor.authorCastro, Paula M. L.
dc.date.accessioned2011-09-14T09:11:55Z
dc.date.available2011-09-14T09:11:55Z
dc.date.issued2007
dc.description.abstractBACKGROUND: Volatilization has been advanced as one of the predominant phenomena contributing to volatile organic carbon emissions from wastewater treatment plants (WWTPs). In this study, strategies for minimizing such air stripping losses when treating a liquid stream containing dichloromethane (DCM), aiming at decreasing the overall emission inventory from WWTPs, were investigated. RESULTS: System R1, consisting of a continuous flow stirred tank reactor (CSTR) treating a liquid stream containing DCM at a concentration of 12 mmol dm−3 presented a biodegradation efficiency (BE) of 68%, based upon chloride release, with 10% of measurable losses, mainly due to volatilization, and 22% of unmeasurable losses. System R2 introduced operational designs aiming at decreasing DCM volatilization. In Experiment R2.1, a biotrickling filter, through which the air stripped from the CSTR was driven, was introduced leading to a reduction from 10% to 7% on the measurable losses. In Experiment R2.2, the air stripped from the CSTR was recirculated at a flow rate of 2.4 dm3 h−1 through the reactormedium before entering the biotrickling filter. The BE was improved from 69% to 82% and the losses associated with air stripping were successfully reduced to 2%. The proposed design, including air recirculation and the biotrickling filter, increased the ratio between the biodegradation rate and the volatilization rate from 7 to 41. CONCLUSIONS: Recirculation of the gaseous effluent through the reactor medium, which allowed for higher residence time within the bioreactor, was shown to be a successful strategy for improving the treatment process, thus minimizing DCM volatilization losses.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1002/jctb.1758
dc.identifier.urihttp://hdl.handle.net/10400.14/5529
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSociety of Chemical Industrypor
dc.subjectDichloromethanepor
dc.subjectBiodegradationpor
dc.subjectVolatilization lossespor
dc.subjectVOC emissionspor
dc.titleAerobic biological treatment of wastewaters containing dichloromethanepor
dc.typejournal article
dspace.entity.typePublication
person.familyNameF. Duque
person.familyNameCastro
person.givenNameAnouk
person.givenNamePaula
person.identifier2013444
person.identifier.ciencia-id7819-FA0D-FC04
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0002-8360-1404
person.identifier.orcid0000-0001-8841-6606
person.identifier.ridN-5863-2014
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id36573459300
person.identifier.scopus-author-id7102781782
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationd23f1d0d-9558-4f84-aa79-1efc0552f360
relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
relation.isAuthorOfPublication.latestForDiscoveryf2253992-dc8d-4042-9a0f-597ebcf0a1d6

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