dc.creator | Mazuelos Rojas, Alfonso | es |
dc.creator | Moreno-Pérez, Martín | es |
dc.creator | Perdigones, Blanca | es |
dc.creator | Ramírez del Amo, Pablo | es |
dc.creator | Iglesias González, María Nieves | es |
dc.date.accessioned | 2023-11-10T07:23:01Z | |
dc.date.available | 2023-11-10T07:23:01Z | |
dc.date.issued | 2023-12 | |
dc.identifier.citation | Mazuelos Rojas, A., Moreno-Pérez, M., Perdigones, B., Ramírez del Amo, P. y Iglesias González, M.N. (2023). Ferrous iron biooxidation in a flooded packed-bed bioreactor at extreme conditions of iron concentration and acidity. Minerals Engineering, 204 (108408). https://doi.org/10.1016/j.mineng.2023.108408. | |
dc.identifier.issn | 0892-6875 | es |
dc.identifier.uri | https://hdl.handle.net/11441/150436 | |
dc.description.abstract | The utility of ferrous iron biooxidation is to regenerate Fe(III) at required rates and conditions in specific hydrometallurgical contexts, such as metal extraction from ores/concentrates and mining and electronic waste. In these applications, considerable kinetics improvements can be achieved by increasing [Fe(III)], but pH must be decreased to avoid precipitation of this oxidant. Information about continuous biooxidation operation is limited to [Fe] < 20 g/L and 2.3 > pH > 1, therefore, it is interesting to test wider ranges for these parameters.
A 1L flooded packed-bed bioreactor (30 cm in height), inoculated with Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans, was operated 60 days in continuous mode without interruptions at [Fe] up to 57 g/L and pH up to 0.44.
Total Fe(II) conversion was achieved when operating at [Fe] = 57 g/L and pH = 1.2. The maximum biooxidation rate reached was 3.5 g/L·h for [Fe] = 40 g/L and 1 h of hydraulic retention time. Biooxidation rate decreases by 32 % when pH decreases from 1.2 to 0.44. Nevertheless, the biofilm remained stable at this low pH and steady state was achieved. When comparing the relative decreases in biooxidation rate and oxygen solubility, the drop of efficiency can be explained by aeration limitations and salting out effect. | es |
dc.format | application/pdf | es |
dc.format.extent | 12 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Minerals Engineering, 204 (108408). | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Ferrous iron biooxidation | es |
dc.subject | Acidithiobacillus ferrooxidans | es |
dc.subject | Leptospirillum ferrooxidans | es |
dc.subject | Flooded packed-bed bioreactor | es |
dc.subject | Low pH | es |
dc.subject | High iron concentration | es |
dc.title | Ferrous iron biooxidation in a flooded packed-bed bioreactor at extreme conditions of iron concentration and acidity | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Química | es |
dc.relation.projectID | EU H2020 958252 | es |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0892687523004223 | es |
dc.identifier.doi | 10.1016/j.mineng.2023.108408 | es |
dc.contributor.group | Universidad de Sevilla. TEP186: Biohidrometalurgia | es |
dc.journaltitle | Minerals Engineering | es |
dc.publication.volumen | 204 | es |
dc.publication.issue | 108408 | es |
dc.contributor.funder | European Union's Horizon 2020 research and innovation program under grant agreement N° 958252 | es |