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dc.contributor.authorArias Lizarraga, Dulce María
dc.contributor.authorFradinho, Joana C.
dc.contributor.authorUggetti, Enrica
dc.contributor.authorGarcía Serrano, Joan
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut Universitari de Recerca en Ciència i Tecnologies de la Sostenibilitat
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.identifier.citationArias , D.M., Fradinho, J. C., Uggetti, E., Garcia, J. Polymer accumulation in mixed cyanobacterial cultures selected under the feast and famine strategy. "Algal research: biomass, biofuels and bioproducts", 1 Juliol 2018, vol. 33, p. 99-108.
dc.description.abstractIn this study, a sequencing batch reactor (SBR), operated with transient carbon availability (feast and famine) and different nutrients loads, was used to select cyanobacteria accumulating poly (3-hydroxyalkanoate) (PHB) and carbohydrates from a mixed wastewater-borne microbial culture. The SBR was operated with 12 h aerobic light and 12 h anaerobic dark phases, evaluating the effect of three different operational conditions consisting on; 1) carbon limitation, 2) carbon and phosphorus limitation and 3) phosphorus limitation. Once a steady state was reached in each operational period of the SBR, part of the biomass was collected and submitted to separate batch tests in order to investigate the maximum PHB and carbohydrates accumulation levels. Batch tests were performed during 24 h of illuminated aerobic condition and 24 h of dark anaerobic condition, while inorganic carbon was constantly present. During the SBR operation, inorganic carbon was mostly used for biomass and carbohydrate production, showing very low PHB accumulation levels (<1%). Notwithstanding, in subsequent batch tests, PHB was accumulated after a complete depletion of nitrogen, reaching almost 4%. Concerning carbohydrates, it was found that phosphorus limitation (with and without carbon limitation) led to a culture mostly dominated by cyanobacteria and higher levels of carbohydrate content (43%–48%) than the culture with carbon limitation and high loads of nitrogen and phosphorus (29%). Such contents were obtained in only 24 h of incubation under aerobic illuminated conditions. Hence, these encouraging results indicate that carbon uptake and the consequent polymers production from cyanobacteria can be enhanced through carbon and nutrient feeding strategies
dc.format.extent10 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària
dc.subject.otherAlgae Wastewater-borne cyanobacteria Bioproducts Wastewater
dc.titlePolymer accumulation in mixed cyanobacterial cultures selected under the feast and famine strategy
dc.subject.lemacAlgues -- Biotecnologia
dc.subject.lemacAigües residuals -- Depuració
dc.contributor.groupUniversitat Politècnica de Catalunya. GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorArias , D.M., Fradinho, J. C., Uggetti, E., Garcia, J.
upcommons.citation.publicationNameAlgal research: biomass, biofuels and bioproducts

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