The article proposes one of the options for solving the problem of protecting the environment from harmful substances contained in oil waste. The processing of oil slime has been investigated. The analysis of methods and technologies for processing oil slime is carried out, a thermal method is considered for modeling. The mathematical model we have constructed describes the processes of heat and mass transfer during the evaporation of harmful substances from the oil slime reservoir to minimize the impact of waste on the environment. The numerical solution of the problem is carried out. The calculations were carried out for comparison with experimental data of other authors at different temperatures and speeds. An extensive computational experiment was carried out, the analysis of which showed that the results obtained correctly describe the regularities of heat and mass transfer and evaporation of harmful substances during thermal treatment of oil slime. A software package with visualization and data integration using Python tools has been developed. The studies were carried out to make it possible to clear the oil slime and reduce the negative impact on the environment.