MBT in Italy: A case study for a successful introduction

As other European Countries, Italy has seen a constant increase in MSW production; in fact, over the last 5 years, waste collected have passed from 29.4 Mt in 2001 to 31.6 Mt in 2005, (a growth of almost 7.5%). With respect to separate collection targets fixed by our national legislation - 35% by 2006, 45% by 2008, 65% by 2012 - the average results (24,3% by the end of 2005) seem to ask for a strong improvement. Nevertheless, the average separate collection data reflect deep differences between mature realities (mostly in the north of the Country) with over 65% of waste separately collected, and situations (especially in the south) which are still missing meaningful management improvements.

Mechanical Biological Treatment (MBT) of residual municipal solid waste plays in Italy a major role in national management strategies, with an overall processing of more than one third of waste produced every year. Plant throughput capacity has constantly increased over the last years, coming to over 13 Mt/y (8.5Mt actually treated) in 109 plants operating in 2005. The evolution of the system has passed through a change in the aim of the MSW treatment, which at the beginning was the production of a grey compost suitable for agronomic purposes and then, due to the poor quality results obtained, has turned into a more appropriate reduction of biological activity for a safer landfill disposal. In recent years opportunities have arisen for a secondary fuel production by means of MBT technologies based on waste bio-drying, followed by mechanical refinement; cement kilns and dedicated thermal utilisation plants are the main destinations for such high Calorific Value waste, which can contribute to the partial replacement of traditional fossil fuels for cement and energy production.

Copyright: © Arbeitsgemeinschaft Stoffspezifische Abfallbehandlung ASA e.V.
Quelle: Abfalltage 2008 (Februar 2008)
Seiten: 8
Preis inkl. MwSt.: € 8,00
Autor: Alberto Confalonieri

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