TEMPERATURE INFLUENCE ON THE AGARICUS BISPORUS MUSHROOMS DEHYDRATION PROCESS

  • LILIANA I. MIHALCEA
    Dunarea de Jos” University of Galati, Faculty of Food Science and Engineering, 111, Domneasca Street, No. 800201, Galati, Romania
  • FLORETINA C. BUCUR
    Dunarea de Jos” University of Galati, Faculty of Food Science and Engineering, 111, Domneasca Street, No. 800201, Galati, Romania
  • ALINA MIHAELA M. CANTARAGIU
    “Dunarea de Jos” University of Galati, Faculty of Humanist, Economics and Engineering Sciences, 47, Domneasca Street, 800008, Galati, Romania
  • LEONTINA C. GURGU
    Dunarea de Jos” University of Galati, Faculty of Food Science and Engineering, 111, Domneasca Street, No. 800201, Galati, Romania
  • DANIELA D. BORDA
    Dunarea de Jos” University of Galati, Faculty of Food Science and Engineering, 111, Domneasca Street, No. 800201, Galati, Romania
  • GABRIELA S. IORDACHESCU
    Dunarea de Jos” University of Galati, Faculty of Food Science and Engineering, 111, Domneasca Street, No. 800201, Galati, Romania

Abstract

Edible mushrooms are foods with high nutritional value, delicious and therapeutic products. The main objective of this research was to investigate the influence of different temperatures of the dehydration process on the microstructure and color of Agaricus bisporus mushrooms. Tray drying conditions were: constant air velocity, 50, 60 and 70 °C suited to relative humidity (RH) values of 12.17, 4.8 and 2.26 % respectively. Mathematical modeling of drying process, effective moisture diffusivity and activation energy calculations were presented. The effective moisture diffusivity was between (1.09665 – 2.11723)·10-10 m2∙s-1 for white and (0.99522 – 1.69885)·10-10 m2∙s-1 for brown mushrooms. The activation energy values indicate a higher energy input for the white mushrooms drying. SEM micrographs revealed the overall integrity of the tissue and some hyphae from the stipes of brown and white mushroom appeared intact and similar. At 70 °C, the presence of these crystals is more emphasis due to calcium.

Cuvinte cheie

activation energy color convective air drying effective moisture diffusivity texture