SciELO - Scientific Electronic Library Online

 
vol.31 issue5Decomposition kinetics of gaseous ozone in peanutsKinetic behavior of nitrification in the post-treatment of poultry wastewater in a sequential batch reactor author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Engenharia Agrícola

Print version ISSN 0100-6916

Abstract

BENVENGA, Marco A. C. et al. Application of simulated annealing in simulation and optimization of drying process of Zea mays malt. Eng. Agríc. [online]. 2011, vol.31, n.5, pp. 940-953. ISSN 0100-6916.  http://dx.doi.org/10.1590/S0100-69162011000500012.

Kinetic simulation and drying process optimization of corn malt by Simulated Annealing (SA) for estimation of temperature and time parameters in order to preserve maximum amylase activity in the obtained product are presented here. Germinated corn seeds were dried at 54-76 °C in a convective dryer, with occasional measurement of moisture content and enzymatic activity. The experimental data obtained were submitted to modeling. Simulation and optimization of the drying process were made by using the SA method, a randomized improvement algorithm, analogous to the simulated annealing process. Results showed that seeds were best dried between 3h and 5h. Among the models used in this work, the kinetic model of water diffusion into corn seeds showed the best fitting. Drying temperature and time showed a square influence on the enzymatic activity. Optimization through SA showed the best condition at 54 ºC and between 5.6h and 6.4h of drying. Values of specific activity in the corn malt were found between 5.26±0.06 SKB/mg and 15.69±0,10% of remaining moisture.

Keywords : simulated annealing; Zea mays; drying curves; optimization; simulation.

        · abstract in Portuguese     · text in English     · pdf in English