Thermal Processes in a Biogas Plant for the Disposal of Agricultural Waste
Abstract
The article discusses the thermal processes occurring in a biogas plant in which the mixing device and the heating element are combined into one node, which allows to heat and maintain a given temperature regime more evenly due to the rotation of the heat exchanger and heat transfer to the biomass throughout the entire bioreactor. Required to operate the unit in a thermophilic mode, after its withdrawal to the working state, the heat output is determined by the heat loss of the plant itself and flow with increasing litter temperature to the temperature of the thermophilic mode, which can be described by thermodynamic equations. As a result of theoretical studies, factors have been identified that allow determining the distribution of biomass temperature over the entire volume of the digester. Studies were conducted to obtain data on the impact of the main parameters (design, kinematic and geometric) of a biogas plant and a heat exchanger-agitator on the quality indicators of its work, as well as the thermal processes occurring in it. The theoretical temperature homogeneity of the mixed medium is achieved by combining the heat exchanger and the mixing device into one node, the design and technological parameters of which characterize the intensity of the forced movement of fermented waste, changing the value of thermal conductivity, and finding the temperature field is the main task of the analytical theory of thermal conductivity applicable to the processes occurring in the bioreactor installation.
References
[1] Sasson, A. (1987). Biotechnology: achievements and hopes. Moscow: World, 353 p.
[2] Kyul, E.V., Apazhev, A.K., Kudzaev, A.B., Bianova, N.A. (2017). Influence of anthropogenic activity on transformation of landscapes by natural hazards. Indian Journal of Ecology. vol. 44, pp. 239–243.
[3] Tamakhina, A.Y., Dzakhmisheva, I.Sh., Beslaneev, E.V., Gadieva, A.A. (2018). Bioaccumulation of Heavy Metals by Medicinal Plants of the Inula Genus. Journal of Pharmaceutical Sciences and Research, vol. 10, no. 5, pp. 1263–1266.
[4] Barotfi, I., Rafan, P. (1988). Energy-saving technologies and units at cattle-breeding farms. Moscow: Agropromizdat, 228 p.
[5] Fiapshev, A.G., Kilchukova, O. Kh., Shekikhachev, Y.A., Khamokov, M.M., Khazhmetov, L.M. (2018). International Investment Conference “Investment, Construction, Real Estate: New Technologies and Special-Purpose Development Priorities” (ICRE 2018) MATEC Web of Conferences vol. 212, no. 010032, pp. 1–13.
[6] Reinhold, J. (2004). Einordnung von Komposten in die„Gute fachliche Dündungs praxis” unter besonderer berucksichtigung der Humusversorgung landwirtschaftlicher Boden. Rostok: VDLUFA, 116 p.
[7] Kuratorium fur Technik und Bauwesen in der Landwirtschaft. Verwertung Von Wirtschafts und Sekundarrohstoffdunger in der Landwirtschaft 2005 HRSG AID-Informdienst, vol. 13, 272 p.
[8] Kirsanov, Yu. (2012). Applied theory of thermal conductivity. Lambert Academic Publishing. 372 p.
[9] Aptsiauri, A. (2012). Nonequilibrium thermodynamics. Lambert: Academic Publishing, 292 p.
[10] Babichev, A.P., Babushkina, N.A., Bratkovsky, A.M. (1991). Physical quantities Handbook ed. by Grigoriev, I.S., Meilikhova, E.Z. Moscow: Energoatomizdat. 1232 p.