Перегляд за Автор "Melnyk (Tkachuk), Nataliia"

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Adsorptive purification of ether-aldehyde fraction by natural adsorbents
(2013) Melnyk (Tkachuk), Nataliia; Melnyk, Zinoviy; Shevchenko, Oleksandr
The authors proposed an effective method of processing EAF by using cheap local adsorbents: palygorskite and hydromica, which have high adsorptive properties, could be re-generated and recycled, and deposits of which are developed in Ukraine.
Calculation of geometrical parameters of the cossettes scalder
(2013) Zotkina, Larysa; Verhola, Georgy; Melnyk (Tkachuk), Nataliia
The process of cossettes scalding are examined. The exploration objective is the development of calculation methods for the parameters of the countercurrent cossettes scalders. The research techniques are based on physicochemical laws of constitutional changes and on industrial data processing. The basic stages of cossettes scalding are: preliminary heating of cossette, final heating of cossette, separation of blood and scalder mixture and foam, defoaming.The formulas for calculation of scalder diameter, the length of countercurrent and mixing parts, as well as the diameter of defoamer are proposed reasoning from optimum hydrodynamic conditions in a scalder.The basic dimensions for the scalders of different productivity are adduced.
Influence of shungite treatment methods on its absorption properties and on water treatment quality for beverages production
(2019) Oliynyk, Svitlana; Melnyk, Lyudmila; Samchenko, Iryna; Melnyk (Tkachuk), Nataliia; Loginova, Olga; Kisterska, Ludmyla
The use of shungite activated steam treated and modified by nanosilver provides increased efficiency of cleaning of harmful impurities and stabilization of the redox potential of the prepared water. Використання шунгітової активованої пари та модифікованого срібла забезпечує підвищену ефективність очищення шкідливих домішок та стабілізація окислювально-відновного потенціалу підготовленої води.
Modelling of thermoradiative-convective drying process of products of plant origin
(2023) Dubkovetskyy, Igor; Melnyk (Tkachuk), Nataliia; Burlaka, Tatiana; Tkachuk, Yuliia
Modeling of thermoradiative-convective drying of cultivated mushrooms was carried out when the moisture content decreased from 809 to 30% within 80 minutes, and for hawthorn, the moisture content decreased from 330 to 38% in 60 minutes. The drying time of apple snacks is 70 minutes and increases by 10 minutes compared to apples, which is due to the sugar content in the snacks and the osmotic properties of sugar to retain moisture. According to the developed mathematical model of the drying process, the diffusion capacity of moisture was calculated, which is the largest among the studied products for cultivated mushrooms and is 9.58 × 10−4 m2/s, due to the lowest density of 750 kg/m3 and the highest porosity of the mushroom, which leads to deeper penetration of infrared radiation with a thermal diffusion coefficient of 1,011•10-3 1/K. The moisture diffusion coefficient for hawthorn is 6,8•10-7 m2/s, with a density of 1173,4 kg/m3 and a thermal diffusion coefficient of 0,51•10-2 1/K, due to the fact that the hawthorn fruits are spherical and were placed in the dryer in a heap. Apples and apple snacks when placed in the dryer were cut into slices of 4...6 mm, for which the moisture diffusion coefficient for apples is 8,48•10-5 m2/s, with the density of apples 880 kg/m3 and the thermal diffusion coefficient 3,096•10-5 1/K. Apple snacks were made by blanching apple cores in sugar syrup before drying, which led to a decrease in the moisture diffusion coefficient to 8,28•10-6 m2/s, an increase in density to 965 kg/m3, and a thermal diffusion coefficient of 4,06•10-2 1/K compared to apple slices.Modeling the interaction of convective and thermoradiative energy supply in pulse mode allows to ensure the maximum technological effect.
Researching antiseptic properties of shungite when producing red beet juice
(2012) Melnyk, Lyudmila; Melnyk (Tkachuk), Nataliia; Melnyk, Zinoviy
Іnvestigated antiseptic properties Shung in the production of table beet juice. The efficiency of absorption of harmful microorganisms from juice Shung.
Selection and development of cossettes scalder calculation method
(2014) Zotkina, Larysa; Verhola, Georgy; Melnyk (Tkachuk), Nataliia
The requirements for the process of cossettes scalding are examined. The exploration objective is the development of calculation methods for the parameters of the countercurrent cossettes scalders. The formulas for calculation of scalder diameter, the length of countercurrent and mixing parts, as well as the diameter of defoamer are proposed reasoning from optimum hydrodynamic conditions in a scalder. The basic dimensions for the scalders of different productivity are adduced.Розглянуто вимоги до процесу ошпарювання бурякової стружки. Визначено мету досліджень - удосконалення методики розрахунку геометричних параметрів протиточних ошпарювачів.Виходячи з оптимальних гідродинамічних умов проведення процесів в ошпарювачі, запропоновані формули для розрахунку: діаметра ошпарювача, довжини противоточної ділянки, довжини ділянки змішування, діаметра збірника-піногасника. Наведено основні розміри для ошпарювачів різної продуктивності.
Water-alcohol adsorbing cleaning out of higher alcohols by shungite
(2014) Melnyk, Lyudmila; Turchun, Oleg; Melnyk (Tkachuk), Nataliia; Kuts, Anatoly; Melnyk, Zinoviy
The aim of the research work is to increase the quality and safety of high spirits solutions at the expense of using natural adsorbent shungite.