Litteris et Artibus

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    Technological process of cavitational water disinfection
    (Lviv Polytechnic Publishing House, 2016) Koval, Iryna; Lviv Polytechnic National University
    Technological scheme of cavitational water refinement is described that includes fourth stages: mechanical water refinement (first stage), water treatment by adsorbers (second stage), cavitational water treatment with gas bubbling (third stage) and fourth stage water is supplied to adsorbers again for microbial cells separation from the water and for products removal after cells destruction under cavitation treatment. The effectiveness of water purification is 95-99% that depends of initial amounts of microbes in the water system.
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    Research of pneumatic systems of automatic dosing of liquid
    (Видавництво Львівської політехніки, 2017-12-23) Torbych, Bogdan; Lviv Polytechnic National University
    The theoretical generalization and given practical solution are important national and economic significance of the scientific and technical problem of creating a competitive single-type liquid dosage equipment for automation of the technological process containing contours of the dosage of liquid supply. The paper presents research materials and proposes structural and circuit design solutions for the creation of a complex of pneumatic systems for the automatic dosage of liquids with dose measuring on indirect parameters, representing a new original technology in this area.
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    Optimization of logistics management processes in transport nodes
    (Lviv Polytechnic Publishing House, 2015) Litvinova, Yana; State Higher Educational Institution “Nation Mining University”
    Theoretical bases of the effectiveness of logistics systems operation is analyzed. Conditions of quality improvement for сargo owners service are determined. Problem situations that arise in the process of clients' service are characterized together with the reasons of their occurrence. Directions of optimization of the processes of transport nodes operation from the view of logistics management are suggested together with the effectiveness criterion, which enables consideration of the inner-system characteristics.