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