Artigo
Foam mat drying of tomato pulp
Secagem de polpa de tomate pelo método de camada de espuma
Registro en:
FERNANDES, R. V. B. et al. Foam mat drying of tomato pulp. Bioscience Journal, Uberlândia, v. 29, n. 4, p. 816-825, Jul./Aug. 2013.
Autor
Fernandes, Regiane Victória de Barros
Queiroz, Fabiana
Botrel, Diego Alvarenga
Rocha, Vitangela Vieira R
Lima, Carla Ferreira de
Souza, Vívian Raquel de
Institución
Resumen
The purpose of this study was to optimize the formulation of tomato pulp foam and to evaluate
the drying process using the foam mat method at temperatures of 60°C and 80°C. The optimization was conducted by
analyzing the effect of the albumin concentration (expressed in %) and whipping time (expressed in minutes) in relation to
the response variables of foam density and thermal stability of the foam based on the volume of remaining foam. The
drying curves (moisture versus drying time ratio) for the control treatment (CT; no albumin addition) and optimized
treatment (OT) were obtained. The results showed that only the whipping time variable (linear and quadratic effects) had
significant influence (p < 0.05) on the foam density values. The foam stability was significantly influenced by the
whipping time (p < 0.10) and albumin concentration (p < 0.10). The optimum foam formation conditions considering
higher foam stability and lower density included a 4.5% albumin concentration and a 4.5 minutes of whipping time. The
results of the drying curves showed that the foam formation with albumin significantly reduced (p < 0.05) the time
necessary to reach moisture equilibrium during drying. The moisture equilibrium values were not significantly different (p
> 0.05) among the treatments with foam application at the studied temperatures, but they were lower than the treatments
without foam application.