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  KEYWORD

Closing the loop: a sustainable strategy for Municipal Solid Waste (MSW) managing with zero residues and energy production

Reference persons BERNARDO RUGGERI

External reference persons carlos.gomezcamacho@polito.it

Description The thesis proposal aims at presenting a comprehensive valorisation strategy for Municipal Solid Waste (MSW). An initial part of the strategy has been previously developed [1], considering the split of MSW into two different fractions of interest: Refuse Derived Fuel (RDF) and Organic Fraction Municipal Solid Waste (OFMSW). The first is suitable for thermochemical valorisation via gasification (i.e. partial oxidation, with syngas production), while the second is useful for biological conversion, through a mesophilic Two-Stage Anaerobic Digestion System (TSAD) for the production of biogas mixtures (i.e bio-H2 and bio-CH4).
The last step in the circular strategy for MSW valorisation will be addressed by designing and modelling a Plasma Torch Process (PTP) for the final treatment of heavy organic and metal particles. PTP is last step in the MSW processing chain, operated at high temperature (5000-7000°C), which produces syngas from the residual organic material and a vitrified solid residue from inorganic material. PTP is fed by the electricity generated by the combustion of the produced energy carriers during the overall processing-chain (syngas and biogas).
The performance of the system will be conducted at two different levels: i) at environmental level by means of a Life Cycle Analysis (LCA) approach, using indicators such as global warming potential, photochemical oxidation, eutrophication impact and human health and ii) Energy Sustainability Analysis (ESA) of the system, using the indicators energy sustainability index, energy return on investment and energy payback time.
[1] G. Lombardelli, R. Pirone, and B. Ruggeri, “LCA Analysis of different MSW treatment approaches in the light of energy and sustainability perspectives,” Chem. Eng. Trans., vol. 57, pp. 469–474, 2017.


Deadline 12/01/2021      PROPONI LA TUA CANDIDATURA




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