Matsak A. Increasing of environmental safety of water bodies due to stormwater influence reducing from urban territories

The dissertation on competition for a scientific degree of the candidate of technical sciences on a specialization 21.06.01 – ecological safety. – Scientific-research institution “Ukrainian Scientific-Research Institution of Ecological problems”, 2020. The thesis is devoted to the theoretical and scientific substantiation of the methods, that aimed on the decreasing levels of the negative ecological impact of stormwater on water bodies, due to the treatment and localization, which forms on the urban territories (cities and production facilities). The characteristics of drainage and regulation of the stormwater and general ways of the treatment systems for this kind of wastewaters have been studied. The method of estimation of the quantity of stormwater pollutants ingress to the nonurbanized territories and calculation parameters and formulas have been scientifically substantiated and improved. The new classification of urbanized territories due to the stormwater pollution concentration have been formed and principal schemes of the stormwater treatment for each group of the new classification have been proposed. The new method of stormwater pollution prediction by the dust sampling from roads tray have been developed. The method of the stormwater localization and treatment with filtration nozzles have been improved. This process includes the stormwater treatment through the filtration layers19 and with ongoing discharge of treated stormwater with drainage pipes or with infiltration to the ground. This method includes different types of the treatment process: adsorption of pollutants from stormwater discharge; biodegradation on biofilm which forms on the surface of filtration nozzles; anaerobic processes in lower levels of filtration device. For obtaining best result, after implementation this method, general conditions should be followed. By experiments and laboratory experience, have been established that: most favorable temperature for the treatment process is22-26 º C; green upper layer should be without any dust and debris (regular obligatory maintain duties); regeneration of filtration nozzles (several times during warm seasons, depends on the stormwater territory formation); upper layer regular cleaning. The results have been implemented into the wastewater treatment system of “Ecopark Fieldman” (Kharkivskiy district, Dergachivsky area, Lisne village, Kiyvske shosse st, 12), as one of the stage of the treatment system. The high efficiency of the treatment from this method implementation have allowed to improve the ecological state on the park territory. By the results from the thesis the standard 8691:2016 “The Guidelines for establishing technological standards for rainwater wastewater discharge into water bodies” have been developed. This standard provides wide range of different approaches and methods which could help to regulate and control the quality of stormwater from urbanized territories. Prognosis of a stormwater quality could be used as monitoring factor for many ecological regulatory agencies and municipalities administrations. The expected economical profit from implementation of the infiltration method of strormwater treatment with filtration nozzles use on the territory of Philip Morris Ukraine is E = 10818 UAH / year. Keywords: urban territories, stormwater, water body, pollution, suspended solids, wastewater treatment technologies, infiltration, filter nozzles, eclological safety.