Browsing by Author "Lebedeva, Elena"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Ecological safety predictive modeling concerning fine cocoa dust dispersion, released by confectionery manufacture
    (Lviv Politechnic Publishing House, 2018-02-01) Iurchenko, Valentina; Lebedeva, Elena; Ponomaryova, Svitlana; Kharkov National University of Civil Engineering and Architecture; Ukrainian Research Institute of Environmental Problems
    In order to predict ecological safety conserning cocoa dust emission (PM2,5 and PM10), the mathematical modeling of its dispersion was performed considering the atmosphere turbulent diffusion. Necessary gravity sedimentation rate of cocoa dust for modeling was identified during the experimental researches. Obtained results indicate the necessity of intensification of fine particles emission clean-up in the observed confectionery factory.
  • Thumbnail Image
    Item
    Reduction of environmental hazard of Hudrogen Sulfide emission from sewerage pipelines and visual pollution, formed by degassing units
    (Publishing House of Lviv Polytechnic National University, 2016) Iurchenko, Valentina; Lebedeva, Elena
    At some sites of the sewage collector in Kharkov concentration of hydrogen sulfide in the underroof space exceeds in thousands of times daily average MPC. As a result the gaseous emissions from the sewage network in the city atmosphere the content of hydrogen sulfide in the atmosphere of residential development area may exceed the MPCd.a. The degasifier, installed above the sewage shaft efficiently rectifies gas releases. Design solutions are developed, which allow to harmonize degasifiers on sewerage nets with urban environment of different application.