Balancing of energy flows in a life cycle of thermal energy production from biogas

Slobodan Cvetković; Mirjana Kijevčanin

doi:10.5937/zasmat2104269C

Authors

Slobodan Cvetković Ministarstvo zaštite životne sredine Republike Srbije, Beograd Author
Mirjana Kijevčanin University of Belgrade, Faculty of Technology and Metallurgy, Serbia Author

DOI:

https://doi.org/10.5937/zasmat2104269C

Keywords:

biogas, heat energy, life cycle, energy, energy efficiency

Abstract

Biogas is a promising source for energy production in future energy systems. In this paper, the energy flows in the life cycle of a real biogas plant (Mirotin-Vrbas) for thermal energy production were considered, starting from corn silage production, cow manure transport, process of anaerobic digestion and biogas production, to the use of solid and liquid digestate for production of crops. Four energy indicators were used to evaluate energy flows in this work. The obtained results showed that this biogas system has a positive energy balance of 62.418 GJ and an energy efficiency of 6,1, which indicates that in terms of substitution of fossil fuel consumption, this system for heat production is a good alternative.

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