А multi-vortex separator developed to increase the efficiency of air purification from aerosol particles in the paint shops of industrial enterprises. The results of numerical studies to determine the efficiency of separation of gas coming out of each hole located in the separator lid are presented. The influence of the height of the slots, the velocity of the gas flow and the size of the dispersed particles on the separation efficiency and hydraulic resistance of the device is considered. The dependence of the hydraulic resistance on the height of the slots and the average discharge velocity of the gas at the inlet to the separation element is obtained. Holes are installed in the separator, through which a larger number of elusive particles pass, which are recommended to be used for fixing the upper removable cover.

The results of environmental assessment of emissions of pollutants (pollutants), greenhouse gas CO₂ and odor emissions from sugar factories into the air are presented. The discrepancy in the interpretation of industrial environmental control on the basis of the concept of the best available technologies (BAT) for the technological line of sugar production and the requirements of environmental legislation for a sugar plant as an anthropogenic object of monitoring is shown. To achieve the effect of reducing the emission of carbon dioxide into the atmosphere, twostage saturation of defecation juice was studied using jet technology. Various options of hardware design for the practical implementation of the injection process of saturation have been proposed.

The pilot study demonstrated efficienct purification of dark gray soils of oil pollution (58–5780 mg HC/kg dry soil) by biological objects. Cleaning efficiency demonstrated in the range from 22.92 to 97.57 % depending on soil, pollutant concentration, as well as bioremediation model applied. It was identified that combined technologies application for bioaugmentation of bacterial strains and phytoremediation allow an efficient restoration of oil-contaminated dark gray soils.

The innovative technology of sulphurous-alkaline waste recycling after sulfur removal to produce technogenic soil was proposed and tested. The ecological safety of the obtained granular product was proven. Product granulometric composition, its density, humidity and compactibility vs. natural soils were researched. Applicability of obtained material as technogenic soil was substantiated. High strength properties of obtained technogenic soil were identified for enabling steep slope fillings and reducing the earthwork area.

A method for obtaining a composite membrane with a surface layer for water treatment processes is proposed. Nylon-AC composite membranes were obtained by immersion of a polymer substrate made of nylon-66 in a solution of cellulose acetate (AC) in acetone. The properties of membranes have been studied, the parameters of nanofiltration of composite membranes have been established. The content of heavy metal ions in underground water has been studied. The specific performance of membranes for distilled and underground water is determined depending on the number of applied layers of AC. The selectivity of the composite membrane with respect to metal ions was established, the retention capacity for which averaged 86 % with a specific productivity of 137 dm³/(m²·h), which exceeds the performance of a commercial nanofiltration membrane.

Study results on sorption properties of broken bricks with particle size of 1-2 mm with regards to Fe(III) ions in standardized test solutions were presented. It was identified that broken bricks have satisfactory sorption properties, the most effective content of broken bricks vs. solution volume, sorption equilibrium, separation efficiency and static adsorption capacity were were brought to light. Kinetic curves and sorption isotherms were obtained to establish physical sorption surface control by broken bricks particles with an insignificant proportion of chemisorption. Broken bricks may be recommended for preliminary iron removal of natural and waste waters upstream the main iron removal stage of water treatment and purification processes.

Data on conditions and volumes of slag formation resulting from waste fuel incineration is presented, technological schemes of processing and disposal are made including carbon dioxide fixation. Results of gravitational-magnetic slag enrichment to process polymetallic bulk concentrate are achieved. Granulometric, chemical and mineral composition of fresh and unused slags resulting from waste incineration were measured. Differences of slag material composition depending on grain-size class were identified. Reaction equations of slag carbonization were studied. Reactivity of slag phases with respect to carbonic oxide was assessed. Carbonization potential of unused and fresh slags resulting from waste incineration was calculated depending on grain-size class.

Electret effects of the selective electrostatic separation of crushed particles of recycled polymers were examined. Polymer electrets properties dependence on fissuring and chemical activation environments of synthetic polymeric wastes surfaces was revealed.

It was brought to light that soils, benthal deposits and vegetation at the industrial site were loaded with a lot of heavy metals and arsenic. It was concluded about an extreme social and ecological danger of the industrial site at the former battery plant "Vostsibelement". It is a potential threat for the entire upper Bratsk reservoir, all the necessary criteria for its inclusion in the State register of hazardous production facilities are met, and it is to be reclaimed.

The results of studying the production potential of phytocenoses of fouling of coastal hydraulic structures (groins) and solid substrates of the adjacent water area in the southwest (Lyubimovka and Foros villages), south (Cape Martyan) and southeast (eastern embankment of the city of Alushta) of Crime are reflected. Analysis of the periphyton and benthic communities showed the production superiority of Rhodophyta in periphyton and Ochrophyta in benthos. Dominants and codominants with high absolute phytomass belong to the genera Ericaria Stackhouse and Gongolaria Boehmer. The absolute phytomass of the cenosis, the relative phytomass Ochrophyta, and the Shannon index vary without exceeding the norm established for biological objects. The absolute and relative phytomass of Chlorophyta is characterized by increased variability.

The possible creation of a transboundary cluster for waste management and pollution elimination was considered, within which the member organizations of Russia and Finland would be able to augment each other's potentials and strengthen their competitiveness by jointly using current knowledge, technologies, experience and resources. A comparative analysis of the sector concentration in the border areas of the Russian Federation and Finland was made based on employment data, fixed capital expenditures and earnings which makes possible to identify a high employment ratio in waste management in Leningrad region and the Republic of Karelia, and investment in fixed capital in the Republic of Karelia and Finland. These results may be used to launch an efficient industrial cooperation of both Finnish and Russian parties.