Development of energy efficient mixing strategies in egg-shaped anaerobic reactors through 3D CFD simulation
| Autor: | Eduardo Hernandez-Aguilar, Juan M. Méndez-Contreras, Anselmo Osorio-Mirón, Alejandro Alvarado-Lassman |
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| Rok vydání: | 2016 |
| Předmět: |
Work (thermodynamics)
Environmental Engineering 0208 environmental biotechnology Flow (psychology) Mixing (process engineering) 02 engineering and technology 010501 environmental sciences Residence time (fluid dynamics) 01 natural sciences Viscosity Bioreactors Rheology TRACER Bioreactor Humans Computer Simulation Anaerobiosis 0105 earth and related environmental sciences Sewage Chemistry Environmental engineering General Medicine Mechanics 020801 environmental engineering Hydrodynamics |
| Zdroj: | Journal of Environmental Science and Health, Part A. 51:536-543 |
| ISSN: | 1532-4117 1093-4529 |
| DOI: | 10.1080/10934529.2016.1141619 |
| Popis: | This work describes a 3D computational fluid dynamic model, which characterizes the hydrodynamic behavior of a mixing strategy applied to egg-shaped reactors that lack a mechanical stirring device. The model is based on Navier-Stokes and material balance equations without a chemical reaction. To describe the behavior of mixing, initial water feed flows of 6, 7.5 and 9 mL s(-1) were used. An experimental validation was subsequently carried out using a pulse technique, with NaCl as a tracer. The residence time distributions were quantitatively determined. Then, the degradation process of the wastewater sludge was characterized by studying the time dependence of the dynamic viscosity, the concentration of volatile solids and the density of wastewater sludge. The data resulting were introduced into the validated model, and five feed flows from 9 to 13 mL s(-1), the best performance found was with feed flow of 11 mL s(-1). |
| Databáze: | OpenAIRE |
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