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dc.contributor.authorDapelo, Davide
dc.contributor.authorBridgeman, John
dc.date.accessioned2020-11-25T09:45:53Z
dc.date.accessioned2020-12-04T14:45:40Z
dc.date.available2020-11-25T09:45:53Z
dc.date.available2020-12-04T14:45:40Z
dc.date.issued2020-04-15
dc.identifier.citationDapelo D and Bridgeman J (2020) A CFD strategy to retrofit an anaerobic digester to improve mixing performance in wastewater treatment. Water Science And Technology. 81(8): 1646-1657.en_US
dc.identifier.urihttp://hdl.handle.net/10454/18193
dc.descriptionYesen_US
dc.description.abstractTo date, mixing design practice in anaerobic digestion has focussed on biogas production, but no adequate consideration has been given to energy efficiency. A coherent, comprehensive and generalized strategy based on computational fluid dynamics (CFD) modelling is proposed to improve mixing efficiency of a full-scale, unconfined gas-mixed digester for wastewater treatment. The model consists of an Euler-Lagrange (EL) model where biogas bubbles are modelled as the Eulerian dispersed phase, and non-Newtonian sludge as the Lagrangian continuous phase. Robustness tests show that mixing predictions are independent of bubble size. The CFD strategy comprises the assessment of different mixing geometries and a range of input gas flow rates. Quantitative results show that simple retrofitting measures are able to achieve a significant improvement in the degree of mixing with reduced mixing times, and consequently recommendations for best mixing geometry and gas flow rate are given. A generalization to a generic digester is discussed in a form that is readily usable by professionals and consultants.en_US
dc.language.isoenen_US
dc.rights(c) 2020 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (https://creativecommons.org/licenses/by/4.0/)en_US
dc.subjectAnaerobic digestionen_US
dc.subjectCFDen_US
dc.subjectMixingen_US
dc.subjectMultiphaseen_US
dc.subjectSludgeen_US
dc.subjectWastewateren_US
dc.titleA CFD strategy to retrofit an anaerobic digester to improve mixing performance in wastewater treatmenten_US
dc.status.refereedYesen_US
dc.date.Accepted2020-02-03
dc.date.application2020-02-26
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.identifier.doihttps://doi.org/10.2166/wst.2020.086
dc.date.updated2020-11-25T09:45:54Z
refterms.dateFOA2020-12-04T14:48:09Z


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