Autors: Durakova, A., Bogoeva, A. L., Yanakieva, V., Gogova, Tzv., Choroleeva, K.
Title: Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin
Keywords: jujube (Ziziphus jujube mill), physico-chemical parameters, sorption characteristics

Abstract: The present study determined the physico-chemical parameters of the exotic fruit jujube (Ziziphus jujube mill) of Bulgarian origin – pH of 4.62, refractometric dry matter of 31.6 %, dry matter (in weight) of 36.78 %, TTA (total titratable acidity) – citric acid – of 0.67 %, 0.70 % malic acid, 65.95 % moisture, 0.78 % fibre, 1.41 % protein, 23.65 % carbohydrate, 0.24 % fat and energy value of 428.44 kJ/102.4 kcal. Equilibrium moisture content and monolayer moisture content were established for desorption concerning eight water activities in the 0.1 0.9 range and the temperatures of 10 °С, 25 °С and 40 °С. The coefficients of the modified Oswin, Chung-Pfost, Halsey and Henderson models were obtained statistically. The modified Halsey model is recommended as a description of the desorption isotherms of jujube (Ziziphus jujube mill) since it corresponds to the criteria for model assessment and suitability. Via BET model linearization, the values of the monolayer moisture content for desor



    9th International Conference on Thermal Equipments, Renewable Energy and Rural Development (TE-RE-RD 2020), E3S Web Conferences, vol. 180, pp. 03007, 2020, Romania, EDP Sciences, DOI 10.1051/e3sconf/202018003007

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