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dc.contributor.authorPassos, Fabiana Lopes del Rei
dc.contributor.authorAstals, Sergi
dc.contributor.authorFerrer Martí, Ivet
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental
dc.date.accessioned2015-01-13T18:11:31Z
dc.date.created2014-11-01
dc.date.issued2014-11-01
dc.identifier.citationPassos , F.; Astals, S.; Ferrer, I. Anaerobic digestion of microalgal biomass after ultrasound pretreatment. "Waste management", 01 Novembre 2014, vol. 34, núm. 11, p. 2098-2103.
dc.identifier.issn0956-053X
dc.identifier.urihttp://hdl.handle.net/2117/25352
dc.description.abstractHigh rate algal ponds are an economic and sustainable alternative for wastewater treatment, where microalgae and bacteria grow in symbiosis removing organic matter and nutrients. Microalgal biomass produced in these systems can be valorised through anaerobic digestion. However, microalgae anaerobic biodegradability is limited by the complex cell wall structure and therefore a pretreatment step may be required to improve the methane yield. In this study, ultrasound pretreatment at a range of applied specific energy (16-67. MJ/kg. TS) was investigated prior to microalgae anaerobic digestion. Experiments showed how organic matter solubilisation (16-100%), hydrolysis rate (25-56%) and methane yield (6-33%) were improved as the pretreatment intensity increased. Mathematical modelling revealed that ultrasonication had a higher effect on the methane yield than on the hydrolysis rate. A preliminary energy assessment indicated that the methane yield increase was not high enough as to compensate the electricity requirement of ultrasonication without biomass dewatering (8% VS).
dc.format.extent6 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
dc.subject.lcshBiogas
dc.subject.otherAlgae
dc.subject.otherAnaerobic biodegradability
dc.subject.otherBiogas
dc.subject.otherHigh rate algal pond
dc.subject.otherMicroalgae
dc.subject.otherWastewater
dc.titleAnaerobic digestion of microalgal biomass after ultrasound pretreatment
dc.typeArticle
dc.subject.lemacBiogàs
dc.subject.lemacAlgues -- Biogàs
dc.contributor.groupUniversitat Politècnica de Catalunya. GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient
dc.identifier.doi10.1016/j.wasman.2014.06.004
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac15283551
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorPassos , F.; Astals, S.; Ferrer, I.
local.citation.publicationNameWaste management
local.citation.volume34
local.citation.number11
local.citation.startingPage2098
local.citation.endingPage2103


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