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dc.contributor.authorMora Garrido, Mabel
dc.contributor.authorFernández Palacios, Eva
dc.contributor.authorGuimerà Villalba, Xavier
dc.contributor.authorLafuente Sancho, Javier
dc.contributor.authorGamisans Noguera, Javier
dc.contributor.authorGabriel Buguña, David
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC
dc.identifier.citationMora, M. [et al.]. Feasibility of S-rich streams valorization through a two-step biosulfur production process. "Chemosphere", Agost 2020, vol. 253, p. 126734: 1-126734: 10.
dc.description.abstractA bioscrubbing process named SONOVA has been developed, tested and assessed herein to valorize flue gases containing SOx. The process consists in a first scrubbing stage, to absorb and oxidize SO2 to sulfate, followed by a two-step biological stage. It consists of (1) an up-flow anaerobic sludge (UASB) reactor to reduce sulfate to sulfide with crude glycerol and (2) a continuous stirred tank reactor (CSTR) to partially oxidize sulfide to elemental sulfur (S0). SONOVA integrates the reutilization of resources, using the effluent of the biological stage as a sorbent agent and the residual heat of flue gases to dry the product. S0 is then obtained as a value-added product, which nowadays is produced from fossil fuels. In this research, SO2 concentrations up to 4000 ppmv were absorbed in 2 s of gas contact time in the spray-scrubber with removal efficiencies above 80 %. The UASB reduced up to 9.3 kg S-Sulfate m-3 d-1 with sulfide productivities of 6 kg S m-3 d-1 at an hydraulic retention time (HRT) as low as 2h. Finally, CSTR was fed with the UASB effluent and operated at HRT ranging from 12h to 4h without biomass wash-out. Sulfide was fully oxidized to S0 with a productivity of 2.3 kg S m-3 d-1 at the lowest HRT tested. Overall, this research has explored not only maximum capabilities of each SONOVA stage but has also assessed the interactions between the different units, which opens up the possibility of recovering S0 from harmful SOx emissions, optimizing resources utilization and costs.
dc.description.sponsorshipAuthors are members of the GENOCOV research group from the Department of Chemical, Biological and Environmental Engineering at UAB (Universitat Autònoma de Barcelona), a unit of Biochemical Engineering of Xarxa de Referència en Biotecnologia de Catalunya (XRB), Generalitat de Catalunya. Authors acknowledge Nubiola Spain (FERRO Corporation) and the Spanish Government, through the projects RTI2018-099362-B-C21 and RTI2018-099362-B-C22 MINECO/FEDER, EU, for the financial support provided to perform this research.
dc.rightsAttribution-NonCommercial-NoDerivs 4.0 International
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Biotecnologia
dc.subject.lcshSulfur oxides
dc.subject.lcshScrubber (Chemical technology)
dc.subject.lcshFlue gases
dc.subject.lcshUpflow anaerobic sludge blanket reactors
dc.subject.lcshGases -- Absorption and adsorption
dc.subject.otherSOx emissions
dc.subject.otherIntegral process
dc.subject.otherUp-flow anaerobic sludge
dc.subject.otherFlue gas 30 valorization
dc.titleFeasibility of S-rich streams valorization through a two-step biosulfur production process
dc.subject.lemacGasos de combustió
dc.subject.lemacGasos -- Absorció i adsorció
dc.contributor.groupUniversitat Politècnica de Catalunya. BIOGAP - Grup de Tractament Biològic de Contaminants Gasosos i Olors
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
local.citation.authorMora, M.; Fernández-Palacios, E.; Guimera, X.; Lafuente, J.; Gamisans, X.; Gabriel, D.
local.citation.startingPage126734: 1
local.citation.endingPage126734: 10

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