The article deals with the problem of disposal of the sludge formed after the treatment of wastewater at the production of chemical fibers. Sludge after sedimentation is stored in storages and pollutes the environment. We carried out a comparative analysis of existing methods of disposal of sewage sludge from chemical production, which showed that the most environmentally friendly way is pyrolysis. We have analyzed the chemical and fractional composition of ash sludge after pyrolysis. The analysis revealed that the resulting ash waste is similar to ash from coal-fired power plants, which makes it possible to use it as a microfill for paving roads or sidewalks. By selling the ash waste it is possible to reduce the payback period of the pyrolysis unit installation and reduce the ecological load on the environment.

Keywords: pyrolysis, sludge, sediment, ash, disposal

The article analyzes the influence of an air cushion vehicle as a source of dust on the general and local picture of the dust situation in an industrial premises and assesses the significance of the increase in the concentration of dust particles in the dust and gas environment. A model for measuring the dustiness of the working area of industrial premises using a special set of high-frequency bandpass filters and a PC is proposed. Determination of dust content in industrial premises is carried out by the received spectrum of the acoustic signal, which is a "frequency portrait" of the concentration of dust particles in the dust and gas environment.

Keywords: industrial premises, transport vehicle, concentration of dust particles, measuring complex, ultrasonic signal, dustiness spectrogram

One of the most massive polymer waste of consumption is car tires that are going out of service. The disposal of such tires at a solid waste landfill is an extremely inefficient way of their disposal, entailing an increase in the area of landfills and an increase in negative environmental impact. The least financially and labor-intensive way of processing automobile tires is grinding into fractional crumbs. To reduce the costs of sorting and further grinding of tires, a shredder with a dispersion of 3 mm is used. The article suggests the use of rubber crumbs as a binder when laying highways. Studies of indicators affecting the operational parameters of asphalt pavement at different values of the mass of rubber crumbs in comparison with a clean sample were carried out and the optimal specific mass of the added crumbs was determined, which was 15-20%.

Keywords: rubber crumb, tires, asphalt mix, optimal weight

In the article, the object of the study is the spread of pollutants from the sources of their release. During the calculations, the sources of atmospheric pollution were combined with the allocation of groups taking into account the height of the mouth of the emission source. To reduce time-consuming calculations using the method of combining sources of atmospheric pollution, the program has been created that provides fast processing of a large amount of information. A data bank on the main sources of pollution of the Rostov region has been compiled; systematization and reduction of these sources to a single coordinate system has been carried out. A trial estimation calculation of the regional transport of pollutants from the combined sources of emissions with the construction of maps of pollution isolines was made.

Keywords: harmful emissions, sources of pollution, the method of unification, data bank, maps of pollution isolines

The article considers the problem of continuous monitoring of the concentration of dust flow in air ducts at enterprises in the production of building materials. A spectral-timbre methodology for estimating dust concentration based on the analysis of acoustic emission signals is proposed. Two stages of adaptation of the simplified assessment of dust concentration on the bench model and in production conditions were carried out. In the process of adaptation, a piezoceramic sensor is used, an acoustic signal from which using a preamplifier is fed to a recording device called potentiometer with a circular daily diagram . The reference weight method was used to measure the actual dust concentration and simultaneously record the readings of an adapting dust meter.

Keywords: building materials, dust concentration, dust measuring equipment, acoustic methodology, acoustic emission signals, Fourier spectrum

The article considers the possibilities of using a large fraction of coal industry enrichment waste in road construction. The use of waste rock as a large aggregate in the composition of road concrete is proposed, because the enrichment waste is not disposed of properly, but is sent to the tailings dump. These dumps occupy large areas of land, thereby causing damage to the environment. The fractional composition of coal waste from the enrichment of the Gukovo-Zverevsky coal-bearing area is analyzed. From the results of sieving, it was seen that the structural composition satisfies the size of the fractions of a large aggregate for the concrete mixture. Analytical studies of the composition of the concrete coating were carried out. Based on the analysis of the composition of the concrete mixture, we came to the conclusion that tailings waste can be used as a major substitute. A comparative characteristic of the requirements put forward for the resulting mixture is presented. In our work, one of the main qualities of the road concrete pavement was tested - strength. The results of experimental strength tests of control samples of concrete with various types of aggregate are presented. Based on the results obtained, it is possible to draw a positive conclusion about the possibility of using enrichment waste as a large aggregate of concrete mixture in road construction according to technical and economic criteria.

Keywords: road construction, concrete mix, enrichment waste, coal rock

The article considers the potential of atmospheric pollution by a combination of certain average annual values of microclimatic parameters and the range of their changes. Numerical methods for solving the turbulent diffusion equation are used in the construction of research models of various scales. An important place among them is occupied by methods of component-by-component splitting. With their help, it is possible to solve not only direct, but also inverse (conjugate) problems. The presented program allows calculating one-time concentrations of impurities under various meteorological conditions based on data on sources of impurity emissions and local conditions and provides for the possibility of constructing a topo-base of the settlement platform.

Keywords: microclimatic parameters, pollution, surface concentrations, topo bases of the settlement platform, methods of component-by-component splitting

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