Effect of air-temperature and diet composition on the drying process of pellets for japanese abalone (Haliotis discus hannai) feeding

Food Science and Technology (Campinas)

Antonio Vega-gálvez¹  Roberto Lemus-mondaca¹  Daniel Plaza-sáez¹  Mario Pérez-won¹ 

[1] ,Universidad de La SerenaLa Serena,Chile

关键词: japanese abalone;    pellets;    drying kinetics;    diffusion coefficient;    weibull;    haliote japonês;    pellets;    cinética de secagem;    coeficiente de difusão;    weibull;   

DOI  :  10.1590/S0101-20612011000300022

来源: SciELO

【 摘 要 】

The aim of this research was to study the effect of air-temperature and diet composition on the mass transfer kinetics during the drying process of pellets used for Japanese Abalone (Haliotis discus hannai) feeding. In the experimental design, three temperatures were used for convective drying, as well as three different diet compositions (Diets A, B and C), in which the amount of fishmeal, spirulin, algae, fish oil and cornstarch varied. The water diffusion coefficient of the pellets was determined using the equation of Fick's second law, which resulted in values between 0.84-1.94×10-10 m²/s. The drying kinetics was modeled using Page, Modified Page, Root of time, Exponential, Logarithmic, Two-Terms, Modified Henderson-Pabis and Weibull models. In addition, two new models, referred to as 'Proposed' models 1 and 2, were used to simulate this process. According to the statistical tests applied, the models that best fitted the experimental data were Modified Henderson-Pabis, Weibull and Proposed model 2, respectively. Bifactorial analysis of variance ANOVA showed that Diet A (fishmeal 44%, spirulin 9%, fish oil 1% and cornstarch 36%) presented the highest diffusion coefficient values, which were favored by the temperature increase in the drying process.

【 授权许可】

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