Mendez-Romero D.C.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco |
Lopez-Lopez A.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco |
Vallejo-Rodriguez R.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco |
Leon-Becerril E.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco
Chemical Engineering and Processing: Process Intensification | Year: 2011
The research study hereby is aimed at the characterization of the hydrodynamics and kinetics of an upflow anaerobic fixed-bed reactor used in the secondary treatment of slaughterhouse wastewater. Hydrodynamics was determined by means of impulse tracer trials and by calculating residence time distribution curves at different volumetric flow rates. At high flow rates (110-204. mL/min), the reactor showed a plug flow behavior with axial dispersion and interactions with dead zones; nonetheless, at low volumetric flow rates (2.29-27.90. mL/min), the dispersion and interaction with dead zones increased, and short circuits appeared behaving as a stirred reactor. In this study, the hydrodynamics and kinetics results were combined with flow pattern description models (stirred tank, plug flow, stirred tank reactors in series and dispersion models) in order to assess organic matter removal efficiency as chemical oxygen demand at the anaerobic reactor. The comparison of the first-order kinetic constants obtained experimentally and the kinetics constants from the models allowed the obtaining of the anaerobic reactor's hydrodynamics and kinetic characterization. Optimal operating conditions and design parameters such as average residence time and efficiency, by taking into account reactor and wastewater characteristics were determined. © 2011 Elsevier B.V.
LoPez-Ramrez J.E.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco |
Martn-Del-Campo S.T.,Monterrey Institute of Technology |
Escalona-Buenda H.,Metropolitan Autonomous University |
Garca-Fajardo J.A.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco |
Estarron-Espinosa M.,Research Center istencia En Tecnologa seno Del Estado Of Jalisco
CYTA - Journal of Food | Year: 2013
Silver Tequila 100% agave was aged in new oak barrels from four French regions. The evolution of physicochemical parameters regulated by Official Mexican Standard, as well as color, turbidity, total acidity and pH were assayed during 34 weeks of maturation. Analysis of variance (ANOVA) showed significant differences between barrel origin on furan-2-carboxaldehyde, dry extract, color and turbidity; and throughout maturation time on all evaluated parameters, except for total acidity, ethanol, and butan-2-ol. The principal component analysis (PCA) made it possible to separate three different groups corresponding to Silver (S), Aged (A), and tequilas during ripening transition (G), as well as to describe an evolution in two steps. Finally, general discriminant analysis (GDA) made it possible to classify correctly 69% of the samples according to barrel origin and 100% of the samples as G and A tequilas. © 2013 Taylor & Francis.