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CPOTE2022 logo
CPOTE2022
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1136-A

Book of abstracts draft
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Thermoecological cost of hydrothermal carbonization of the under-sieve fraction of residual municipal wastes

Barbara MENDECKA, Niccolo Cusano University, Italy
Klaudia CZERWINSKA, AGH University of Science and Technology, Poland
Simone FABRIZI, Niccolò Cusano University, Italy
Lidia LOMBARDI, Niccolò Cusano University, Italy
Maciej SLIZ, AGH University of Science and Technology, Poland
Malgorzata WILK, AGH University of Science and Technology, Poland

In this study thermoecological cost (TEC) analysis of hydrothermal carbonization (HTC) of under-sieve fraction (USF) of municipal solid wastes (MSW) was performed. The TEC of hydrothermal carbonization of the USF was studied, considering two DB/W conditions (0,07 and 0,15), three different operative temperatures (180-200-220°C), and three different operative times (1-4-8 h). The influence of the single processes and operative conditions were analyzed and compared assuming different USF treatment processes (bio stabilization and landfilling, HTC and wastewater treatment (WWT). Thermo-ecological cost, which in contrast to other methods of ecological assessment, can bring all environmental impacts into one measure which is the exergy of the consumed natural, non-renewable resources is resulted in an appropriate method for evaluating the environmental performance of fuel production processes. The best TEC balance was obtained for the case of HTC where the substrate is treated for 1h under 180°C temperature conditions and with a dilution of 0.15. It is demonstrated that the USF can be effectively transformed into hydrochar. Even if, the base treatment of USF is a simpler process, HTC process results are more favorable with respect to the base case.

Keywords: Thermoecological Cost, Hydrothermal Carbonisation, Sustainable waste management, Waste valorization, Exergy analysis