Mass transfer of wholegrain ready mixture with elderberry

¹ Department of Process Engineering, Technical Faculty, University of Food Technologies – Plovdiv, 26, Maritsa Blvd, 4002 Plovdiv, Bulgaria
² Department of Mechanical and Instrument Engineering, Faculty of Mechanical Engineering, Technical University-Sofia, Branch Plovdiv, 25 Tsanko Diustabanov Str., Plovdiv 4000, Bulgaria
³ Institute of Food Preservation and Quality - Plovdiv, 154 Vasil Aprilov Blvd., 4003 Plovdiv, Bulgaria
⁴ Department of Technology of Grain, Fodder, Bread and Confectionery Products, University of Food Technologies - Plovdiv, 26, Maritsa Blvd, 4002 Plovdiv, Bulgaria
⁵ Language Training Center, University of Food Technologies – Plovdiv, 26, Maritsa Blvd, 4002 Plovdiv, Bulgaria

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

In recent years, an increasing number of studies have focused on searching of alternative versions of using waste products rich in natural nutrients form different productions. The received results of the physico-chemical analysis and the sorption characteristics of wholegrain ready flour mixture with added quantity of a waste product – elderberry after alcohol fermentation in juice production, are described in the current paper. The nutritional profile of the flour mixture shows that the product is well balanced with significant quantity of carbohydrates 62.32g, dietary fibre 13.65g, low content of fats 3.97g. The total energy value of the product is relatively high which makes it appropriate for consumption as a part of a balanced diet. The conducted mass transferring experiment with ready flour mixture is implemented for three temperatures (10°С, 25°С and 40°С) and eight relative air humidities in the range from 11% to 87%. The received equilibrium moistures content are with confirmative character for food products, with increase of temperature in constant air humidity the values of the equilibrium moisture content lower. The suggested modified model appropriate for isotherms description in conformity with the eligibility criteria is Halsey. The values of the monolayer moisture content received by linearization of the BET model show direct dependence with the temperature for the experiment conditions. In increase of the temperature from 10°С to 40°С the monolayer moisture lowers with с 2.6 % dry mass for the process of absorption and 2.2 % dry mass for desorption.