Evaluation of hydraulic mixing performance in a full-scale anaerobic digester with an external liquid recirculation system using CFD and experimental validation
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Título
Evaluation of hydraulic mixing performance in a full-scale anaerobic digester with an external liquid recirculation system using CFD and experimental validationAutoría
Fecha de publicación
2021-12-26Editor
Elsevier Ltd.ISSN
0009-2509Cita bibliográfica
Arnau, R., Climent, J., Martínez-Cuenca, R., Rodríguez, J., & Chiva, S. (2022). Evaluation of hydraulic mixing performance in a full-scale anaerobic digester with an external liquid recirculation system using CFD and experimental validation. Chemical Engineering Science, 251, 117392.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Anaerobic digestion (AD) has become an essential process for sludge treatment and its optimum performance is related to its mixing degree. In this study, a full-scale Anaerobic Digester (ADer) with an external recir ... [+]
Anaerobic digestion (AD) has become an essential process for sludge treatment and its optimum performance is related to its mixing degree. In this study, a full-scale Anaerobic Digester (ADer) with an external recirculation mixing system was studied via single-phase 3D-CFD simulations to assess the influence
of recirculation flow and a 3-blade propeller. The model was validated with inert tracer tests. The design
and mixing parameters were studied to characterise the mixing efficiency in different scenarios. The
design parameters were assessed first, but wide deviations from the recommended values were found.
Local mixing parameters were found to be useful for defining the degree and type of mixing, and are
highly recommended in the CFD studies of ADers. A second-order statistical moment was proposed as
a global mixing parameter to describe geometrical and local mixing, and to state a reliable homogenisation time. [-]
Publicado en
Chemical Engineering Science, Vol. 251 (6 April 2022)Entidad financiadora
Conselleria de Educació, Investigació, Cultura i Esport (Generalitat Valenciana) | Sustainable Bioenergy Research Consortium (SBRC)
Código del proyecto o subvención
ACIF/2016/255 | EX2019-003
Derechos de acceso
info:eu-repo/semantics/openAccess
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