The increasing problem of the formation of ash dumps in the Rostov region dictates the need to search for environmentally friendly methods of waste disposal in the heat and power sector. In this article, the ash and slag waste of the Novocherkassk GRES is considered. We analyzed the chemical and fractional compositions of the ash-slag mixture formed at a coal-fired thermal power plant and proposed the use of ash waste with a size of 10-100 microns in road construction as a micro-filler. To study the strength of the road surface using ash microparticles, we manufactured and tested cubes of modified concrete mixture for compression using a press machine. The obtained result showed that the use of ash as a micro-filler in concrete does not affect its strength in any way. The tests of control samples with the use of ash wastes showed an improvement in the water resistance and frost resistance of concrete while maintaining its strength.

Keywords: ash and slag waste, micro-filler, concrete mix, road construction

The article discusses the selection and evaluation of energy-saving technologies for metallurgical production. Alternative energy sources are ordinary natural phenomena, inexhaustible resources that are produced naturally. Such energy is also called regenerative or "green". The article assessed the climatic characteristics, landscape, level of development of the territory of the location of the research object, analyzed the possibility of using solar and wind energy, hydropower, waste energy, low-potential energy using secondary energy resources. An engineering system based on the use of regenerative heat exchangers or economizers was proposed, which converts the heat of the exhaust gases from the electric steelmaking production into energy used for heating or hot water supply.

Keywords: metallurgical industry, electric steelmaking, alternative energy, energy saving, engineering systems, low-potential energy, secondary energy resources, heat of exhaust gases, regenerative heat exchangers, economizers

The radiation-temperature dependence for fresh water in the temperature range of 30-50 degrees Celsius is experimentally investigated. It is established that the radiation temperature of the water surface on the waves of the millimeter range is determined exclusively by the effective temperature of the skin layer.

Keywords: radiation temperature, skin layer, water, emissivity,radiation temperature, skin layer, water, emissivity, heat exchange, atmosphere, air

The problem of atmospheric air pollution in the regions is considered. Attention is paid to the development and implementation of automated air pollution control systems. The developed information and analytical system has a two-level system and consists of two subsystems: a city information system and a regional information system. The proposed software allows you to perform calculations of surface concentrations of pollutants with the formation of a data bank, as well as the construction of maps of pollution in the region and histograms of the distribution of the level of adverse effects of atmospheric pollution on humans.

Keywords: atmospheric air, pollution, monitoring, information and analytical system, maps of the pollution of the region

The dependence of the radio brightness temperature of water on the kinetic temperature in the temperature range of 50-90 degrees Celsius in the gigahertz frequency range has been experimentally investigated. It is established that the change in the radio brightness temperature of the water surface, depending on the kinetic temperature, is essentially nonlinear. The radiocontrast in the studied temperature range makes it possible to effectively detect thermal contrasts of the surfaces of hydro-objects.

Keywords: nonlinearity, kinetic temperature, radiation temperature, water, emissivity, radiocontrast, gigahertz range

The paper presents the results of experimental studies on increasing the settling rate and reducing the solid phase in the clarified layer during settling of a solution of sulfuric acid leaching of heavy metals from galvanic sludge. For this purpose, it is proposed to use a monoethanolamine vinyl ester copolymer with sodium or potassium methacrylate as a flocculant. This flocculant works well in a wide range of pH of the solution medium, unlike the well-known and widely used polyacrylamide flocculant. The increase in the efficiency of settling is achieved due to the fact that the flocculant in question makes it possible to simultaneously flocculate positively and negatively charged particles due to the presence of various functional groups in its composition. The use of the proposed flocculant will ensure a more complete extraction of heavy metals from galvanic sludge, which reduces the risk of environmental pollution and their reuse in industry.

Keywords: galvanic sludge, heavy metals, leaching, flocculant, settling, suspended solids

Еxpedition studies were conducted in order to take samples in the components of elementary landscapes - precipitation (snow), surface waters, roadside dust, soil, bottom sediments and sediments at the water's edge along the route of Shakhty (Eastern Donbass) – Margaritovo village (coast of Taganrog Bay) in the Rostov region. In the selected samples, the mass concentration of oil products (OP) was determined, the analysis of which showed that road dust and snow are one of the sources of soil pollution, surface water and bottom sediments. The following sequence of oil product content levels has been revealed as they decrease: road dust → soil → sediments at the water's edge → bottom sediments → snow → surface water, which persists at almost all but one station. The content of oil products in the soils of the region should be estimated as varying from acceptable to average, while the surface waters contained this pollutant in concentrations below the MPC for the waters of fish farms.

Keywords: elementary, landscape, natural components, oil products, Rostov region, road dust, soil, bottom sediments, snow, surface water

The article discusses the production and use of environmentally friendly fuel - pellets. A review of the designs of mobile pellet production plants was carried out, the advantages and disadvantages of these designs were identified. Potential consumers of pellets and equipment (heating boilers for which pellets are the fuel) are considered. A mobile complex for the production of pellets on the chassis of the MSN-10-004-03 . The technology of pellet production using a mobile mobile installation is described.

Keywords: pellets, mobile plant, design, biofuels, production technology