The monograph presents the analysis of the physical and mechanical properties of sunflower oil, technical means of post-harvest processing of crops and the results of pneumatic and pneumatic gravity devices studies. The analysis of sunflower seeds production in Ukraine, the technical equipment of the post-harvest sunflower seeds processing, theoretical studies of the separation process of air separated impurities, the methodical aspects of the experimental devices research, the results of laboratory and field research on experimental devices, practical application of the conducted research results and their economic efficiency evaluation are described.This monograph is aimed at scientists, teachers, students and other categories of readers related to the activities of the agro-industrial complex
The main directions of pneumodynamic system usage for storage of bulk agricultural products are bubbling and pneumatic mixing; loading and unloading of technological masses. During pneumodynamic impulse wave formation with alternation of supersonic and subsonic zones, which are limited by shock waves, sound force increasing on the technological mediumabout 150…170 dB, pressure increasing on the product mass due to compression-stretching at the pulse limits to amplitudes of 6…15 barare caused, that promotes implementation of loosening processes during the grain material storage. The developed scheme of the studied process involves the opposite arrangement of pneumatic impulse generators, which allows the formation of a stationary wave, that spreads the pulse energy in both longitudinal and transverse directions, covering the maximum space of the free flowing technological medium. Using the method of D’Alembert for solving the equations, methods of mathematical analysis and their processing in the MathCAD mathematical environment graphical and analytical dependences of force parameters of oscillatory system have been obtained. Choosing an effective mode of pneumodynamic loosening, the force pulse magnitude and the regularities of its change under conditions of the highest mechanical resistance of the free-flow mass have been used as the evaluation criteria the standing wave energy.
The parameters of the operating modes of vibration wave transportation of products for infrared drying were determined under the conditions that allow with the minimum energy consumption to provide the maximum productivity of the apparatus, which takes place in the case of providing the desired reduction of the moisture of the bulk mass for one pass of the product flow with a satisfactory uniformity of production. The implementation of these conditions requires synchronization of the operating parameters of the two vibrators of the vibrating conveyor infrared dryer, which are aggregated in the supporting rolls of the deformed transport element. The article deals with determination of regularities of basic parameter change of the infrared drying process, which allows to determine development tendencies of technical and technological efficiency of mechanization means of the high-temperature storage system of seed material of oil-bearing products, which is solved due to use of innovative vibrating conveyor technologies and equipment in the process of vibration, wave, impulse, and combined physical and mechanical factors that make available minimizing energy and material consumption at maximum output maintaining the properties of agricultural raw materials. These measures are implemented through the development of vibration wave inter-operative transportation under the conditions of soybean infrared drying. According to experimental studies, using the "dimension analysis" method and the Federman-Buckingham theorem the criterion equation of the process of mass transfer during drying in the fluidized bed of products has been obtained, which is determined by the criteria of Péclet, Stanton, Bourdieu, a function that characterizes the energy, heat and mass transfer parameters, the performance of the studied process, which allows to form the recommended series when designing conveyor infrared dryers for storage systems of bulk agricultural products.
There is an acute problem of providing the population with food products that would not only fully satisfy the energy needs of the human body, but also provide the physiological needs of the human body in vitamins, minerals and other biologically active substances. An important role in providing the population with micronutrients can be played by berries, which are a natural concentrate of biologically active substances. Lowtemperature technologies for preserving berries can significantly increase the production of this high-value raw material, due to which it is possible to significantly improve the nutrition structure, thereby improving the quality of life of the population. This explains the rapid growth in the last decade of the production of frozen fruits and berries and, as a result, the intensive development of food low-temperature technologies. The experimental data during the studies were obtained. The temperature regimes for storing berries with the preservation of quality indicators are given. Low-temperature processing is sometimes the only feasible method of practically year-round storage and transportation for unlimited distances, so freezing in growing areas is a promising method to solve the problem of delivering berries at any distance, to eliminate the seasonality of its consumption, which ensures the stability of nutritional value. Fluidization freezing, similar to drying in the suspended state, is characterized by very intense heat exchange. Freezing berries is a special method of preserving them retaining the nutritional value and taste of the product. The high speed of the process and the formation of the smallest ice crystals prevent the loss of moisture in berries.
Досліджено зміну активної кислотнос ті у купажованих продуктах з овочевої та фруктової сировини. Доведено можливість регулювати активну кислотність введенням у рецептуру консервів фруктів з високою титрованою кислотністю. Абрикоси, аґрус, алича, чорна смороди на характеризуються високим вмістом титро ваної кислотності, то ж здатні замінити в рецептурі консервів органічні кислоти, отримані штучним шляхом. З кабачків, гар бузів, моркви та буряків можна виготовля ти натуральні органічні пюре, соки, ком поти, соуси, натуральні овочеві консерви з регульованою активною кислотністю не вище 3,9 од. рН. Для досягнення такого рівня активної кислотності у консервах варто довести масову концентрацію титрованої кислотності до 0,55-0,60 %. Виготовлені таким способом консерви мікробіологічно стабільні та безпечні за температури сте рилізування 100 °С впродовж 20-25 хви лин, мають високу органолептичну оцінку, в них добре зберігається аскорбінова кислота. У пюре з гарбузів визначена масова частка титрованої кислотності 5,6 од. рН. У купа жованих пюре з гарбузів та абрикос, аґрусу й аличі активна кислотність знизилась до 3,80-3,84 од. рН після додавання розрахова ної рецептурної кількості фруктової частини у композиції від 11,3 до 28,1 %, вміст аскор бінової кислоти підвищився у 1,6-2,6 раза. Вміст аскорбінової кислоти у пюре з гарбузів та чорної смородини за регульованої актив ної кислотності 3,86 одиниць рН підвищився до 30,6 мг/100 г, тобто у 7,6 раза. Аналогічна тенденція в купажованих пюре з моркви та буряка столового. Виготовлені таким способом овочево фруктові пюре та соуси характеризують ся відмінною органолептичною оцінкою яко сті 26,3-29,3 бала. Консервовані продукти з овочевої сировини з регульованим рівнем активної кислотності за рахунок фрукто вої частини є натуральними з підвищеним вмістом аскорбінової кислоти. Комбінування може бути застосованим для виготовлення органічних продуктів з відповідної сировини за збереження її високої якості Ключові слова: пюре, соуси, титрована кислотність, активна кислотність, аскор бінова кислота, органічні продукти
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.