THE METHOD OF SCIENTISTS FROM THE PERM POLYTECH WILL ALLOW TO USE THE POLUTED SOIL AS A FUEL

22 August 2022 127

Waste disposal sites cause harm to the environment. Landfills emit harmful substances into the atmosphere, pollute natural waters and deteriorate the quality of the soil. With the development of waste disposal technologies, the issue of old burial sites remains unresolved. A promising solution to this problem is to obtain energy resources from landfill soil. Scientists of the Perm Polytech conducted field and laboratory studies and assessed the energy potential of the buried waste. The results will be useful for the development of technologies for the elimination of old landfills.

The study of the energy of the soil of the old landfills was carried out by scientists from different countries. However, the results of foreign studies are not suitable for Russian conditions. It's all about the difference in the composition of the landfill, which depends on the term and technology of burial, the practice of sorting garbage, the climate of the territory and other factors.

A distinctive feature of the study by Perm scientists is the assessment of the impact of pollution on the thermal properties of waste. Decontaminating was necessary to understand the true energy of the landfill soil components. It was found that due to sticky soil dampness, the calorific value of waste is reduced by 40%. With the help of a clamour - a machine with vibrating screen - landfill waste is easily cleaned of contamination.

As a result of the study, it was determined that the buried landfill contains from 31 to 46% of caloric components. These include waste paper, various films, PET bottles, 3D plastics, textiles, and wood. The combustion heat of the landfill soil components was 14 MJ/kg. This is comparable to the calorific value of brown coal and is a good indicator. The use of secondary fuel from landfills will partially or completely replace traditional fuel.

The use of landfill fuel will solve the problem of waste disposal. The elimination of landfills will lead to new commercial opportunities. The restored piece of land can be reused as a recreation and tourism area, industrial property development or other forms of structures.

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