Multiple response optimization analysis for pretreatments of Tequila's stillages for VFAs and hydrogen production.
The objective of this work was study the effect of three pretreatments (alkalinization, thermical treatment, and sonication) on Tequila's stillages hydrolysis process in acidogenesis stage, through the following response variables: soluble chemical oxygen demand (CODs), total sugar and volatile fatty acids profile and the hydrogen production at the time. The stillages were subject to these pretreatments (according to a 2(3) factorial design); afterward they were transferred to a batch reactor at 35 degrees C and inoculated with an anaerobic digestor sludge. Multiple response optimization (MRO) analysis was done to find the global optimum for the response variables described above. This optimum is able to maximize simultaneously all these variables. It was found adequate to be useful hydrolyzing the organic matter present in Tequila's stillages. Mathematical models were fitted to observe the estimated effects of pretreatments on each response variable, then the MRO was applied.
University of Guadalajara, Department of Chemical Engineering, Guadalajara, Mexico.
Froylán M
FM
Espinoza-Escalante
Carlos
C
Pelayo-Ortiz
Humberto
H
Gutiérrez-Pulido
Víctor
V
González-Alvarez
Víctor
V
Alcaraz-González
André
A
Bories
D000332:Aerobiosis; D000434:Alcoholic Beverages; D000693:Anaerobiosis; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000032:analysis*; D005285:Fermentation; D005511:Food Handling / Q000379:methods; D006859:Hydrogen / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008800:Mexico; D014865:Waste Disposal, Fluid
D005232:Fatty Acids, Volatile; D006859:Hydrogen