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Efficiency analysis of the generation of energy in a biogas CHP system and its management in a waste landfill. Case study.
 
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1
Institute of Engineering, State University of Applied Sciences, Nowy Sącz, ul. Zamenhofa 1A, 33-300 Nowy Sącz, Poland
2
Department of Environmental Technologies, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland
3
Department of Water and Wastewater Engineering, Silesian University of Technology, ul. Konarskiego 18, 44-100 Gliwice, Poland
4
Faculty Natural Sciences and Health, The John Paul II Catholic University of Lublin, ul. Konstantynów 1H, 20-708 Lublin, Poland
CORRESPONDING AUTHOR
Agnieszka Generowicz   

Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
Publication date: 2022-07-01
 
J. Ecol. Eng. 2022; 23(7):143–156
 
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ABSTRACT
As a waste neutralization facility, the landfill is a kind of bioreactor producing landfill gas or (LFG) - biogas, which should be captured and neutralized for environmental reasons. One of the ways of its utilization is the combined production of heat and electrical energy in combined heat and power (CHP) cogeneration systems. For that purpose, the assessment of the energy efficiency of a cogeneration unit has been undertaken in this work on the basis of the unit’s performance over the last 5 years. The analysis of the CHP system energy performance has demonstrated that the ratios range at the lower limits for units up to 0.5 MW. The lower efficiency of fuel chemical conversion in the CHP plant (0,70) stems from failure to use the rated thermal and electrical power fully (74,2%), which is caused by the insufficient stream of biogas collected from the landfill (161,46 m3∙h-1). The analysis of the use of the generated energy, particularly in terms of heat, has shown a surplus which is not used and therefore is a loss. The proposed solutions in this area should optimize the use of heat generated from the renewable source, that being landfill biogas.