Abstract

APATI, Giannini Pasiznick; FURLAN, Sandra Aparecida  and  LAURINDO, João Borges. Drying and rehydration of oyster mushroom. Braz. arch. biol. technol. [online]. 2010, vol.53, n.4, pp. 945-952. ISSN 1516-8913.  http://dx.doi.org/10.1590/S1516-89132010000400025.

Dehydration and rehydration processes of Pleurotus ostreatus fruiting bodies were investigated in this work. Mushroom samples were dehydrated at 40, 50 and 60 ºC, using drying air with relative humidity of 75 %. The rehydration was investigated at different temperatures of immersion water (25, 55 and 85 ºC) and different immersion times (30, 75 and 120 minutes). The best rehydration occurred for the samples dried at 40 ºC. The rehydration could be done in water at room temperature, during 30 minutes. Water sorption isotherms of samples were determined at 30, 40 and 50 ºC. Both GAB and BET models satisfactorily represented the experimental data of moisture sorption of dried mushrooms.

Keywords : Pleurotus ostreatus; dehydration; rehydration; moisture sorption isotherms.