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In connection with the situation with the environment and energy in the world, it is necessary to study the possibility of using biological waste as an energy resource. The method of thermochemical treatment of organic waste is investigated in this paper. The chicken litter in the form of pellets is used as a raw material. The experimental studies of the torrefaction temperature influence on the thermotechnical characteristics of chicken litter and the yield of products were conducted in lab-scale system. The five temperature regimes of torrefaction (220, 240, 260, 280, and 300 °C) with holding time determined with thermogravimetric analysis are studied. The thermotechnical characteristics of the initial and torrefied material as elemental composition, the lower calorific value, hygroscopicity limit, and bulk density are determined. The properties of non-condensable gases (specific volume yield, chemical composition, and calorific value) are investigated. The material balance for each of the temperature regimes is calculated. The conclusion about the optimum temperature regime for torrefaction of chicken litter based on the results of experimental studies is made.

Effect of temperature process at chicken litter torrefaction on properties of products obtained