Environmental Problems. – 2023. – Vol. 8, No. 2

Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/61160

Науковий журнал

Засновник і видавець Національний університет «Львівська політехніка». Виходить двічі на рік з 2016 року.

Environmental Problems = Екологічні проблеми : [науковий журнал] / Lviv Polytechnic National University ; [editor-in-chief M. Malovanyy]. – Lviv : Lviv Politechnic Publishing House, 2023. – Volume 8, number 2. – P. 71–136 : ill.

Зміст


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Content (Vol. 8, No 2)


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    Study of the anaerobic process of industrial water purification in combination with sorption methods
    (Видавництво Львівської політехніки, 2023-02-28) Popovych, Olena; Havryshko, Marianna; Yaremko, Halyna; Makovskiy, Yevhenii; Lviv Polytechnic National University
    The issues of rational use of natural resources, ecological safety and environmental protection are extremely urgent and require immediate human influence on the optimization of technological processes, reducing the impact on the ecosystem. The implementation of food industry technology is accompanied by the formation of a significant amount of wastewater, into which about a third of processed raw materials go, and the concentration of polluting components in them is 10...100 times higher than in household water. The choice of wastewater treatment methods depends on their composition, prospects for further use, the economic feasibility of applying the methods, and the payback rate of the equipment. Therefore, the modern direction of the development of scientific research and wastewater treatment technology consists in the development of fundamentally new methods of deep wastewater treatment and the study of the possibility of using sorbents of natural and artificial origin.
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    Static regulations of urea (carbamide) adsorption by wet and dried peat
    (Видавництво Львівської політехніки, 2023-02-28) Matsuska, Oksana; Sukhorska, Olga; Gumnitsky, Jaroslaw; Sabadash, Vira; Lviv Polytechnic National University
    The possibility and effectiveness of using a natural sorbent – peat from the Vereshchytsia-Yanivske deposit for treating agricultural wastewater with a high urea content – has been studied. The humidity and moisture content of the upland and lowland types of peat from this peatland were determined. Comparing these indicators made it possible to establish that the lowland peat has a significantly higher humidity and moisture content. The adsorption capacities of wet and dried types of peat for urea were studied and compared. The changes in urea concentration in aqueous solutions of the studied peat samples are presented by the corresponding curves. It was established that the lowland peat (dried samples) has higher sorption properties to urea when absorbed from the water environment than the upland type. In the adsorption of non-dried peat, curves were obtained, which show a gradual decrease in the concentration of urea in the solution, indicating the gradual filling of the active centres of peat with urea molecules. For pre-dried peat, rapid absorption of this pollutant is observed at the initial moments (approximately up to 10 minutes). The calculated maximum absorption capacities of dried peat species for urea show that the maximum absorption capacity of dry lowland peat is significantly higher than that of dry upland peat.