In order to control the chemical composition of atmospheric air in cities located in the zone of influence of petrochemical enterprises, automatic atmospheric air monitoring stations (ASKAV) are installed. For the effective use of experimental data, the authors of the article developed a data collection system with ASKAV, in which the air control in residential quarters and the gas mixture at the source of organized emissions are synchronized. The analysis of data on the concentration of pollutants in the atmospheric air of the Sterlitamak obtained from ASKAV, on the basis of which a list of marker substances for enterprises of the city was compiled. Priority sources of air pollution with marker substances during a different wind regime were identified. The authors developed models for changing the concentration of marker substances in the air using the method of factor regression. Based on the results of the cross-correlation function, the time of movement of the contaminated gas cloud from the source of emission to the residential area of the city is obtained. Conclusions are made about the effectiveness of the developed air monitoring system and the field of application of the acquired models.

The article considers the ways of preserving the quality of drinking water during prolonged storage in closed ship containers. The analysis of water treatment methods in marine conditions allowed to select the most promising and safe methods. The classification of activated oxidation technologies is given in the paper. The functional scheme of integrated ship systems of preparation and conditioning of drinking water is presented.

The article is devoted to the current state of the problem of ship waste management. The paper deals with the problem of anthropogenic impact on water bodies and adjacent territories resulting from shipping, ship repair and industrial production. The classification of hazardous impacts of ships on the environment in accordance with Russian and international regulations. The main methods of solving the problem of ship waste that are currently used are indicated, the main equipment of engineering environmental protection is classified. Comparative analysis of Russian regulatory documents (The Rules of Russian River Register) and international regulatory documents (MARPOL) was held. The conclusion was made about more stringent requirements for emissions of polluting substances on inland waterways. The definition of operational wastes from vessels was proposed. The general trend was shown for toughening of rules and regulations for handling and disposing of ship-generated waste.

The problem of mathematical description of non-steady processes in hydrodynamic systems is currently relevant and requires early resolution. The description of cavitation as a non-steady process is one of the most important issues of hydrodynamics. In this paper, as a result of the analysis and generalization of a priori information, plus transformation of the basic equations describing cavitation processes, a number of expressions are obtained that reflect the behavior of the incompressible fluid main flow in a jet apparatus, taking into account the conduct of hydrodynamic cavitation in it. To create a cavitation process mathematical description, it is proposed to apply an empirical formula for determining the ejected flow pressure. The newly developed mathematical dependencies can be used in the design of jet devices (ejectors, cavitators, ejectors-cavitators) for various purposes in both marine and stationary coastal technological systems for processing fluid media. In particular, it is advisable to use them in the preparation and conditioning of drinking and industrial water, wastewater and oily water purification, etc.

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