The article is devoted to the issue of improving devices for cleaning gas station emissions from hydrocarbon vapors to improve the environmental safety of inhabitant zones and territories of residential development. It is known that emissions of benzene vapors belonging to the second hazard class have a significant problem in terms of exceeding the maximum permissible concentrations at the borders of the sanitary protection zones of gas stations and nearby residential buildings. The largest part of the release of gasoline vapors entering the local aspiration systems is associated with the filling and emptying of fuel storage tanks at gas stations. To reduce emissions from gas station sources, it is proposed to use absorption-type devices in gasoline vapor recovery units. The article presents the results of experiments on a pilot - industrial plant set up with an apparatus for cleaning gas station emissions from benzene and other hydrocarbon vapors using a solution of a mixture of natural sodium-magnesium salts. As a liquid sorbent in such devices, it was proposed to use waste water from a gas station purification device in order to reduce the additional amount of waste generated during their operation. Based on the results of processing the experimental data, a graphical dependence and regression equations were obtained. The areas of aerohydrodynamic regimes at which the highest efficiency is achieved for the parameters of the apparatus of the studied modification are determined. This approach also makes it possible to reduce the negative technogenic impact of gas stations in terms of the generation of additional waste. The successful tests carried out have shown the reliable and efficient operation of the pilot plant set up with the proposed device.

Keywords: gas station, gasoline, emission, atmosphere, fuel, hydrocarbons, aspiration, absorption, device, bischofite, water

The article is devoted to the issue of improving the environmental safety of highly urbanized territories. The article presents the results of field measurements of pollutants into the atmosphere from gas stations within the urbanized territories of cities of the Russian Federation. The largest part of the allocation of oil product vapors entering the local aspiration systems is associated with the operations of filling and emptying fuel storage tanks at gas stations. The results of field measurements of the values of hydrocarbon concentrations obtained on the basis of the values of maximum permissible concentrations of ingredients are presented. The conclusion is drawn on the feasibility of environmental protection measures to reduce emissions when finding housing in the border area of the sanitary protection zone (SPZ) of gas stations. To reduce emissions from gas station sources, it was proposed to equip the gas aspiration system of the gas feeling tank with an improved design of the absorption device. In order to reduce waste generation as a working agent in such devices, it was proposed to use wastewater with a certain amount of oil products from a local gas station treatment device. This approach also allows to reduce the negative anthropogenic impact of gas stations in terms of the formation of additional amounts of waste generated during their operation. Successful tests have shown reliable and efficient operation of the pilot plant with the proposed apparatus.

Keywords: gas station, gasoline, emission, atmosphere, concentration, hydrocarbons, aspiration, reservoir, pollution, oil product, pollution, water