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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Títol
Evaluation of hydraulic mixing performance in a full-scale anaerobic digester with an external liquid recirculation system using CFD and experimental validationAutoria
Data de publicació
2021-12-26Editor
Elsevier Ltd.ISSN
0009-2509Cita bibliogràfica
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.Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
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. [-]
Publicat a
Chemical Engineering Science, Vol. 251 (6 April 2022)Entitat finançadora
Conselleria de Educació, Investigació, Cultura i Esport (Generalitat Valenciana) | Sustainable Bioenergy Research Consortium (SBRC)
Codi del projecte o subvenció
ACIF/2016/255 | EX2019-003
Drets d'accés
info:eu-repo/semantics/openAccess
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