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Co-processing of waste into combined fuel briquettes containing cellulose and synthetic polymers

V.A. Ryzhikov, O.A. Erokhina, E.L. Akim, P.V. Lukanin

Vestnik IGEU, 2025 issue 1, pp. 30—38

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Abstract in English: 

Background. Today, in Russia and globally, recycling of industrial waste is an extremely urgent task, the solution of which will enable the transition to a low-carbon circular bioeconomy and reduce the carbon footprint of anthropogenic impact. The goal of the research is to develop a technology for processing and utilization of pulp and paper industry waste containing synthetic polymers. It is carried out by their co-utilization in the form of combined fuel briquettes of the 2nd generation consisting of solid wood waste and laminated paper production waste, with subsequent utilization in a boiler plant with a low-temperature vortex furnace. The aim is to minimize harm for the ecological environment and increase the maximum energy and economic efficiency of industrial enterprises.

Material and methods. To achieve the stated goal, the following research methods have been used: study of thermoplasticity of synthetic polymers and moisture plasticity of polymeric components of wood in the process of briquette formation, empirical determination of the optimal composition of combined briquette and properties of the obtained briquette using muffle furnace and calorimetric unit.

Results. The paper presents the results of the conducted research and experiments, in particular, the obtained values of density, strength, and calorific value of the obtained briquette at different compositions of feedstock. In case of the optimally chosen composition of raw materials in the fuel briquette, which is defined as the ratio of 50 % of solid wood waste and 50 % of laminated paper production waste, the final density is 1036 kg/m3, the average value of the lowest heat of combustion of fuel is 19 MJ/kg. Also, the compressive strength of 4,5 MPa has been determined under pressure on the cross-section of the briquette.

Conclusions. The fuel briquettes obtained during the research have high indicators of density, strength and heat of combustion of fuel. The innovative technology of processing wood waste and waste packaging laminated paper will minimize harm for the environment and increase the maximum energy and economic efficiency of industrial enterprises. The use of the obtained fuel and the technology of its production will make it possible to reduce the load on landfills with currently unutilized waste and use the obtained fuel energy for own needs.

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Key words in Russian: 
биотопливо, отходы деревообработки, целлюлозно-бумажные отходы, топливные брикеты, синтетические полимеры, термопластичность, влагопластичность, углеродная нейтральность, чистые технологии, биоэкономика
Key words in English: 
biofuels, industrial wood waste, pulp and paper waste, fuel briquettes, synthetic polymers, thermoplasticity, moisture plasticity, carbon neutrality, clean technologies, bioeconomy
The DOI index: 
10.17588/2072-2672.2025.1.030-038
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