International Journal of Heat and Mass Transfer Volume 54, Issue 23-24, November 2011, Pages 5077-5086 Self-heating in a bioreactor: Coupling of heat and mass transfer with turbulent convection (Article) Zambra, C.E.a , Rosales, C.b, Moraga, N.O.c, Ragazzi, M.d a Centro de Investigación de Recursos Hídricos (CIDERH), Universidad Arturo Prat, Arturo Prat 2120, Iquique 1100000, Chile b Departamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso 2340000, Chile c Departamento de Ingeniería Mecánica, Universidad de la Serena, Benavente 980, La Serena 1700000, Chile d Department of Civil and Environmental Engineering, University of Trento, Via Mesiano 77, Trento I-38050, Italy View additional affiliations Abstract A tridimensional mathematical model that considers the turbulent flow inside a bioreactor of municipal waste material (MWM) is studied. The MWM is self-heating by the biological activity of micro-organisms. The model includes the unsteady solution of the turbulent flow field inside the reactor, the energy transport in the flow and the ensuing heat and mass transfer by convection over the MWM load. The MWM is treated as a porous medium and the oxygen depletion and heat generation produced by aerobic bacteria are also included. Turbulence treatment is done with the κ- model. The numerical simulation shows good agreement with experimental measurements available. The results also shed light over some design criteria that can be explored in order to increase the efficiency of the process.
Self-heating in a bioreactor: Coupling of heat and mass transferwith turbulent convection
Ragazzi, Marco
2011-01-01
Abstract
International Journal of Heat and Mass Transfer Volume 54, Issue 23-24, November 2011, Pages 5077-5086 Self-heating in a bioreactor: Coupling of heat and mass transfer with turbulent convection (Article) Zambra, C.E.a , Rosales, C.b, Moraga, N.O.c, Ragazzi, M.d a Centro de Investigación de Recursos Hídricos (CIDERH), Universidad Arturo Prat, Arturo Prat 2120, Iquique 1100000, Chile b Departamento de Ingeniería Mecánica, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso 2340000, Chile c Departamento de Ingeniería Mecánica, Universidad de la Serena, Benavente 980, La Serena 1700000, Chile d Department of Civil and Environmental Engineering, University of Trento, Via Mesiano 77, Trento I-38050, Italy View additional affiliations Abstract A tridimensional mathematical model that considers the turbulent flow inside a bioreactor of municipal waste material (MWM) is studied. The MWM is self-heating by the biological activity of micro-organisms. The model includes the unsteady solution of the turbulent flow field inside the reactor, the energy transport in the flow and the ensuing heat and mass transfer by convection over the MWM load. The MWM is treated as a porous medium and the oxygen depletion and heat generation produced by aerobic bacteria are also included. Turbulence treatment is done with the κ- model. The numerical simulation shows good agreement with experimental measurements available. The results also shed light over some design criteria that can be explored in order to increase the efficiency of the process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
