Biogas purification through membrane bioreactors: Experimental study on siloxane separation and biodegradation
dc.contributor.author
dc.date.accessioned
2020-12-03T08:40:59Z
dc.date.available
2022-10-28T05:46:32Z
dc.date.issued
2020-05-01
dc.identifier.issn
1383-5866
dc.identifier.uri
dc.description.abstract
Sewage biogas valorization to different energy applications is hampered by the presence of volatile methyl siloxanes. Despite the high operating costs, adsorption onto activated carbon is the most implemented technology for siloxane removal from biogas. In order to purify biogas sustainably, the current work explores the diffusion of siloxanes (octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane) together with other biogas impurities (limonene, toluene and hexane) through polydimethylsiloxane membranes. Abiotic tests revealed transport efficiencies above 75% towards a clean air stream for most compounds, although the transport of the most hydrophobic pollutants was challenged when water was circulated through the shell side of the membrane. Moreover, the performance of a hollow-fiber membrane bioreactor, inoculated with anerobic active sludge, was evaluated towards biogas purification in anoxic conditions. Toluene and limonene were successfully degraded, hexane's removal efficiency was positively correlated with the residence time, and siloxanes removal was achieved up to 21%. CO2 was detected in the outlet gas as the mineralization product as well as some byproducts from the degradation of limonene and siloxanes. The presence of 1% of O2 in the gas, as a strategy to substitute NO3−, efficiently supported high removal for volatile organic compounds and moderate for siloxanes, which would ultimately reduce the operating costs of the technology
dc.description.sponsorship
This work was funded by the Spanish Ministry of Science, Innovation and Universities (CTQ2014-53718-R) co-funded by FEDER and University of Girona. Eric Santos-Clotas thanks Universitat de Girona for his predoctoral grant (IFUdG-2015/51). Alba Cabrera-Codony
acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement Nº 712949 (TECNIOspring PLUS) and from the Agency for Business Competitiveness of the Government of Catalonia (TECSPR16-1-0045). LEQUIA has been recognized as consolidated research groups by the Catalan Government (2017-SGR-1552 and 2017SGR-548, respectively)
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MINECO//CTQ2014-53718-R/ES/TECNOLOGIAS INNOVADORAS PARA LA MEJORA DE BIOGAS: DESDE LA INVESTIGACION BASICA A LA EVALUACION DE TECNOLOGIAS/
dc.relation.isformatof
Versió postprint del document publicat a: https://doi.org/10.1016/j.seppur.2019.116440
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© Separation and Purification Technology, 2020, vol. 238, art.núm.116440
dc.relation.ispartofseries
Articles publicats (D-EQATA)
dc.rights
Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
dc.rights.uri
dc.source
Santos Clotas, Eric Cabrera-Codony, Alba Comas Matas, Joaquim Martín, María José 2020 Biogas purification through membrane bioreactors: Experimental study on siloxane separation and biodegradation Separation and Purification Technology 238 art.núm.116440
dc.subject
dc.title
Biogas purification through membrane bioreactors: Experimental study on siloxane separation and biodegradation
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.embargo.terms
2022-05-01T00:00:00Z
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2022-05-01
dc.relation.projectID
info:eu-repo/grantAgreement/EC/H2020/712949/EU/ACCIÓ programme to foster mobility of researchers with a focus in applied research and technology transfer/TECNIOspring PLUS
dc.type.version
info:eu-repo/semantics/acceptedVersion
dc.identifier.doi
dc.identifier.idgrec
030580
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1873-3794