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dc.contributor.authorBenzal Montes, Eva
dc.contributor.authorCano, A.
dc.contributor.authorSolé Sardans, Maria Montserrat
dc.contributor.authorLao Luque, Concepción
dc.contributor.authorGamisans Noguera, Javier
dc.contributor.authorDorado Castaño, Antonio David
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Recursos Naturals i Medi Ambient
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC
dc.identifier.citationBenzal, E. [et al.]. E-waste valorisation by recovering valuable metals with microorganisms. A: International Conference on Sustainable Solid Waste Management. "7th International Conference on Sustainable Solid Waste Management: 26-29 June 2019". 2019, p. 1-10.
dc.description.abstractThe effectiveness of bioleaching in copper recovery from printed circuit boards by Acidithiobacillus ferrooxidans has been evaluated under a wide range of conditions demonstrating the suitability of the technology and their limits. The process has been tested using a column reactor simulating conditions found at industrial scale and operating in continuous mode. Moreover, new strategies have been adapted to increase the efficiency of the operation and to reduce the time required for this purpose. Taking into account the complex composition of electronic waste, the limitations of applicability, for instance due to the accumulation of toxic metals in the solution, have been also identified by microrespirometric measurements. Experiments carried out at laboratory scale verifies the proof of concept of the biotechnology for this application, recovering 37% of copper using flasks with a concentration of 7.5 g/L of e-waste in 6 hours. This efficiency was improved in the case of the packed column, where 50% of copper was recovered using the same amount of e-waste at the same period time. New strategy was developed to increase the kinetic of reaction and overcome transport limitations for the leaching solution, achieving copper recoveries up to 80% in the same period than previously reported. Regarding toxicity assays, the methodology used allows to identify that, depending on the concentration and the time exposed, nickel, copper and aluminium affected the microorganisms’ activity, inactivating them. It was concluded that aluminium resulted more toxic than copper, which in turn was more toxic than nickel, at the conditions tested.
dc.format.extent10 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Biotecnologia
dc.subject.lcshElectronic waste
dc.subject.lcshBacterial leaching
dc.subject.lcshMicrobial biotechnology
dc.subject.otherElectronic waste
dc.subject.otherPrinted circuit boards
dc.titleE-waste valorisation by recovering valuable metals with microorganisms
dc.typeConference lecture
dc.subject.lemacResidus electrònics
dc.subject.lemacBiotecnologia microbiana
dc.contributor.groupUniversitat Politècnica de Catalunya. BIOGAP - Grup de Tractament Biològic de Contaminants Gasosos i Olors
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - author's decision
dc.description.versionPostprint (published version)
local.citation.authorBenzal, E.; Cano, A.; Sole, M.; Lao, C.; Gamisans, X.; Dorado, A.D.
local.citation.contributorInternational Conference on Sustainable Solid Waste Management
local.citation.publicationName7th International Conference on Sustainable Solid Waste Management: 26-29 June 2019

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