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dc.contributor.authorSánchez Fernández, Francisco 
dc.contributor.authorSánchez Kaiser, Antonio 
dc.contributor.authorViedma Robles, Antonio 
dc.contributor.authorGómez Fayrén, Antonio 
dc.date.accessioned2020-06-18T05:54:46Z
dc.date.available2020-06-18T05:54:46Z
dc.date.issued2016
dc.identifier.citationSánchez, F. & Kaiser, A. & Viedma, A. & Gómez, A. (2016). Effects of the aeration on the fluid dynamic behaviour of a multi-zone activated sludge system. En: WIT Transactions on Ecology and the Environment, vol. 202, pp 311-321.es_ES
dc.identifier.issn1743-3541
dc.description.abstractConventional wastewater treatment plants (WWTP) are necessary to modify the wastewater properties in order to make it acceptable for a safe discharge into the environment or a certain reuse purpose. Biological oxidation is the most important of the processes involved in conventional WWTP. Organic substances dissolved in the water are removed by means of bacteria presented in the biological reactor. Air is necessary to enable the reduction of the organic content of the water by the bacteria. Bubbles of air are introduced into the reactor through air diffusers. Air diffusers can account up to 70% of WWTP total energy consumption. So a deep understanding of the dynamic behaviour of the flow is necessary for optimizing the process and saving energy. A numerical analysis of the effects of the aeration in the fluid dynamics behaviour of a real multi-zone activated sludge reactor is carried out. The purpose is to identify and analyse the changes originated in the velocity field by the aeration. A numerical modelling of the activated sludge system located in San Pedro del Pinatar (Murcia, Spain) is developed throughout a general-purpose computational fluid dynamics (CFD) code. The multiphase flow is simulated with a Euler–Lagrange approach; modelling the bubbles as discrete phase. Two simulations, one with aeration and the other without it, are carried out. The numerical results show that the aeration has a notable effect in the performance of the reactor. Changes in velocity field, stagnant zones, residence time distribution or even free surface level originated by the aeration in the reactor are studied. In general, the aeration reduced the amount of stagnant volume in the reactor. However, when the aeration is activated, some re-circulating zones are formed, reducing the residence time in the reactor.es_ES
dc.description.sponsorshipThe researcher team of the present work acknowledges the contribution of the company ESAMUR, owner of the biological reactor studied, which provided the experimental data necessary for the development of the numerical model presented.es_ES
dc.formatapplication/pdfes_ES
dc.language.isoenges_ES
dc.publisherWITpresses_ES
dc.titleEffects of the aeration on the fluid dynamic behaviour of a multi-zone activated sludge systemes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.subjectAir bubbles-water interactiones_ES
dc.subjectActivated sludge systemes_ES
dc.subjectWastewater treatment plantes_ES
dc.subjectNumerical modellinges_ES
dc.subject.otherMecánica de Fluidoses_ES
dc.identifier.urihttp://hdl.handle.net/10317/8594
dc.identifier.doi10.2495/WM160281
dc.identifier.urlhttps://www.witpress.com/elibrary/wit-transactions-on-ecology-and-the-environment/202/35483
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.unesco3308.10 Tecnología de Aguas Residualeses_ES


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