Litteris et Artibus

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Now showing 1 - 5 of 5
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    Determination of the activation energy of the reaction of photosynthesis in chlorophyll synthesizing microalgae
    (Lviv Polytechnic Publishing House, 2016) Dyachok, Vasyl; Katysheva, Viktoriia; Lviv Polytechnic National University
    The dynamics of absorption of carbon dioxide at corresponding temperature by microalgae Chlorella was studied. The results of experimental research will allow to calculate the energy of activating photochemical reaction and other values of kinetics of increase of microalgae within the limits of the investigating temperatures. The analytical dependence of coefficient of growth biomass on temperature within the limits of the investigating temperature was established. The stages of transport of carbon dioxide from air to internal volume of microalgae cell was determined through literature. The optimal terms of their cultivation was selected and analyzed. The results showed that it is possible to forecast the technological scheme of cleaning of gas emissions from carbon dioxide by biological method.
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    Kinetics of filtration drying of biomass
    (Lviv Polytechnic Publishing House, 2016) Kashuba, Liubomyr-Andrii; Mosiuk, Mykola; Аtamanyuk, Volodymyr; Lviv Polytechnic National University
    Usage of fast-growing energy willow as untraditional source of energy has been showed in the article.
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    Reducing of energetic costs for drying process for candied pears production
    (Lviv Polytechnic Publishing House, 2016) Atamanyuk, Volodymyr; Huzova, Iryna; Patrii, Nataliia; Lviv Polytechnic National University
    According to calculations of the heat balance were calculated amounts of energy accumulated by pears layer and energy required to evaporate moisture. It was determined that reduce of energy costs for candied fruits drying is achieved by final drying at ambient temperature.
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    About problem of absorption of greenhouse gas by chlorophyilsynthesizing microalgae in the presence of sulfur dioxide
    (Видавництво Львівської політехніки, 2017-12-23) Dyachok, Vasyl; Katysheva, Viktoriia; Lviv Polytechnic National University
    The presence of non-competitive reverse inhibition by sulfur dioxide in the process of photosynthesis based on the Lineweaver-Burk theory was theoretically justified and experimentally proved. The mathematical description of the growth of the cells of the microalgae is given and as a result of processing experimental data the growth rates of the algae at certain values of inhibitor concentration was defined. Based on the obtained values the analytical dependence of growth rate of biomass from the substance of inhibitor was redused. The maximum value of concentration of sulphur dioxide which may occur photosynthesis and biomass growth of microalgae was set.
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    Effectiveness of fenton reagent in oxidation process of methyl violet dye
    (Видавництво Львівської політехніки, 2017-12-23) Makarova, Lyubov; Pliushko, Olena; Zhyl’tsova, Svitlana; Opeida, Iosyp; Vasyl’ Stus Donetsk National University; National Academy of Sciences of Ukraine
    Decoloration methyl violet dye by Fenton reagent was investigated spectrophotometrically. Reagents concentration, pH value, and metal ion were varied. It was shown that substrate oxidation rate depends non-linearly on dye concentration, Fen+, H2O2, and pH value. The composition of the reaction mixture providing maximum oxidation rate and MV conversion is proposed.