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dc.contributor.authorAlmansa Lagunas, Clara
dc.contributor.authorMasaló Llorà, Ingrid
dc.contributor.authorReig Puig, Lourdes
dc.contributor.authorPiedrahita, Raul
dc.contributor.authorOca Baradad, Joan
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Agroalimentària i Biotecnologia
dc.date.accessioned2015-05-18T11:17:58Z
dc.date.created2014-12-01
dc.date.issued2014-12-01
dc.identifier.citationAlmansa, C. [et al.]. Influence of tank hydrodynamics on vertical oxygen stratification in flatfish tanks. "Aquacultural engineering", 01 Desembre 2014, vol. 63, p. 1-8.
dc.identifier.issn0144-8609
dc.identifier.urihttp://hdl.handle.net/2117/27945
dc.description.abstractIn sole (Solea spp.) culture, like in other flatfish culture, it is likely that a vertical gradient of dissolved oxygen (DO) occurs with the lower concentrations being at the tank bottom. This lower concentration at the tank bottom is a consequence of fish oxygen consumption and of the presence of the boundary layer. This fact generates lower DO concentrations in the near-bottom zone where soles are lying most of the time. The aim of this work was to study the hydrodynamic conditions that determine the oxygen gradient that occurs in the layer of water adjacent to flatfish.; Three flow rates were tested in a circular tank and in a rectangular or raceway tank. For each flow rate, water velocities, boundary layer thickness and Reynolds number were calculated. Results showed that the vertical gradient of dissolved oxygen diminishes when water velocity and Reynolds numbers (Re) increase. At the fish density used in this work (11.6 kg m(-2)), when Re decreased under 6000, a large increase in the DO gradient was observed. Guidelines are presented to determine in which situations, as defined by hydraulic parameters, Re >6000 is achieved and DO stratification avoided.; The present work shows that in raceways, the flow rate required to avoid DO stratification is higher than that typically needed to maintain water quality (oxygen, ammonia-nitrogen, carbon dioxide and suspended solids). In circular tanks, it can be easier to achieve velocities that are high enough to avoid stratification with low water inlet flow rates, by adjusting the area of the water entry orifices. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent8 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria agroalimentària::Pesca::Aqüicultura
dc.subject.lcshViscous flow
dc.subject.otherOxygen stratification
dc.subject.otherTank hydrodynamics
dc.subject.otherViscous sublayer
dc.subject.otherSolea senegalensis
dc.subject.otherONCORHYNCHUS-MYKISS EMBRYOS
dc.subject.otherDISSOLVED-OXYGEN
dc.subject.otherBOUNDARY-LAYER
dc.subject.otherCIRCULAR TANK
dc.subject.otherWATER INLET
dc.subject.otherFLOW
dc.subject.otherAQUACULTURE
dc.subject.otherDESIGN
dc.subject.otherPERFORMANCE
dc.subject.otherCULTURE
dc.titleInfluence of tank hydrodynamics on vertical oxygen stratification in flatfish tanks
dc.typeArticle
dc.subject.lemacAqüicultura -- Instal·lacions
dc.contributor.groupUniversitat Politècnica de Catalunya. SPAq - Sistemes de Producció Aqüícola
dc.identifier.doi10.1016/j.aquaeng.2014.07.007
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S014486091400079X
dc.rights.accessRestricted access - publisher's policy
drac.iddocument15184678
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorAlmansa, C.; Masaló, I.; Reig, L.; Piedrahita, R.; Oca, J.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameAquacultural engineering
upcommons.citation.volume63
upcommons.citation.startingPage1
upcommons.citation.endingPage8


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Except where otherwise noted, content on this work is licensed under a Creative Commons license: Attribution-NonCommercial-NoDerivs 3.0 Spain