Environmental Problems

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Author: search.filters.author.Melnikova, Oxana

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    Influence of waste water from wastepaper processing utilities on the oxygen mode of natural and technical water objects
    (Lviv Politechnic Publishing House, 2019-02-26) Iurchenko, Valentina; Ivanin, Pavlo; Radionov, Mykyta; Melnikova, Oxana; Kharkov National University of Civil Engineering and Architecture; Ukraine Scientific Research Institute of Ecological Problems
    During the experimental investigations the influence of different silicon deaerators, which are added into the pulp to prevent the foam formation, on oxygen saturation of waste waters formed during the paper goods production from wastepaper was estimated. It was shown that deaerators significantly reduce oxygen concentration in waste waters and, consequently, increase its danger for natural water basins. The indicators of performance of the flotation in removing deaerators from waste water were reviewed.
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    Surface wastewater treatment from various fractions of petroleum products from the territory of highway infrastructure facilities
    (Lviv Politechnic Publishing House, 2019-02-26) Iurchenko, Valentina; Melnikova, Oxana; Mikhalevich, Nikolay; Borzenko, Oleksandra; Kharkov National University of Civil Engineering and Architecture; Kharkiv National Automobile and Highway University
    The article is devoted to the parameters of mechanical treatment of surface wastewater generated in the territory of suburban facilities of the highways from petroleum products (PPs) and their separate fractions. It is found that the open settling mode is more promising. The highest effect of treatment from PPs (within the range under study) is achieved at PPs initial concentration of 125–210 mg/dm3 on the third day of settling.