Today, due to the growing urbanization and the increase in waste generation volumes, the problem of the operation of waste disposal facilities is becoming crucial. Landfills are one of the most common methods of handling the growing amount of production and consumption wastes globally.
In order to estimate the environmental safety of a waste disposal facility, experimental studies of its thermal state and the analysis of gas characteristics of surface and subsurface self-heating source discharges have been conducted. It has been established that the increase in the distance of thermal imaging of the self-heating source, considering the meteorological conditions, causes the reduction of the registered radiant emittance according to the power-law function.
The degree of oxygen utilization and the ratio of СО2/СО and СН4/СО2 concentrations are the indices that characterize self-heating processes at a waste disposal facility. The ratio of СО2/СО concentrations in the surface self-heating sources characterizes the probability of subsurface combustion processes in conditions of limited oxygen inflow. The ratio of СН4/СО2 concentrations indicates aerobic and anaerobic processes in the self-heating source at the landfill. During the development of the process in the subsurface self-heating source, the active combustion occurs with less oxygen excess whereas the degree of air oxygen utilization rises.
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