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DETERMINATION OF THERMAL AND STRUCTURAL-MECHANICAL CHARACTERISTICS OF RAFFINATE AS AN OBJECT OF DEHYDRATION AFTER THE EXTRACTION OF COLORING COMPONENTS FROM FRUIT VEGETABLE RAW MATERIALS

https://doi.org/10.37493/2307-910X.2020.3.26

Abstract

The aim of the research was to study the thermophysical, structural-mechanical and heat exchange parameters of the raffinate, as an object of dehydration, after the extraction of coloring components from the eggplant peel. A feature of the raw materials of the Astrakhan region is that in the region there are enterprises specializing in the processing of vegetable raw materials, in particular eggplants in the production of food products popular in our country - "eggplant caviar". At the same time, implementing this or that technology for obtaining this type of product, about 10 ... 15% of waste from the total amount of raw materials is accumulated at enterprises, in particular, in the form of crushed eggplant peel, which can be a raw material for the production of natural food coloring. It is obvious that the formation of a rational technological flow of the production of natural dyes during the disposal of technology waste, in particular, the raffinate after the extraction of colorants from the eggplant peel, relies on the creation of rational storage conditions, taking into account the mechanism of behavior of anthocyanins from a chemical point of view, and expands the prospects for the production of environmentally friendly and positive natural dyes and by-products affecting human health, which is impossible without a comprehensive study of the characteristics for each process of the technology of these products. According to the principle of additivity, the values of density and heat capacity are found depending on the moisture content of the product, as well as its temperature and thermal conductivity according to the known empirical ratio, taking into account the regularity of their variation. The values of the heat transfer coefficient during drying of the material with convective energy supply were determined by calculation, based on the obtained experimental data. The found values of the complex of parameters affecting the drying process, as well as the patterns of their variation in rational temperature and humidity ranges, are necessary for the rational design of moisture removal and drying equipment.

About the Authors

E. V. Andreeva
Astrakhan State Technical University
Russian Federation


S. S. Evseeva
Astrakhan State University of Architecture and Civil Engineering
Russian Federation


I. Y. Aleksanian
Astrakhan State Technical University
Russian Federation


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For citations:


Andreeva E.V., Evseeva S.S., Aleksanian I.Y. DETERMINATION OF THERMAL AND STRUCTURAL-MECHANICAL CHARACTERISTICS OF RAFFINATE AS AN OBJECT OF DEHYDRATION AFTER THE EXTRACTION OF COLORING COMPONENTS FROM FRUIT VEGETABLE RAW MATERIALS. Modern Science and Innovations. 2020;(3):202-209. (In Russ.) https://doi.org/10.37493/2307-910X.2020.3.26

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ISSN 2307-910X (Print)