Current Status and future role of MBT in Italy.

Mechanical biological treatment in Italy has been used since 20 years ago to solve waste management emergency. By now, the introduction of waste separate collection, and more virtuosos waste management systems, above all in North Italy, reduced MBT use. New scenario and LCA studies, suggested that MBT need to be reduced, unless for simple mechanical treatment (manual treatment used to recover material from residual waste). Despite to this scenario, Italian Landfill directive and the new EU guidelines on SRF could revitalize MBT process, the recurs to landfill for organic streams and the incineration of the dry fractions.

The Mechanical Biological Treatment (MBT) refers to a process consisting in the mechanical fractionation of MSW into a wet (mostly organic) and a dry fraction (mostly plastic and paper) and in the successive biological treatment of the wet fraction. In the last 20 years these kinds of processes found a wide diffusion in Europe (e.g. Austria, Germany and Italy). The biologically treated wet fraction is known as biostabilized organic or compost-like fraction and its fate is the landfill or its usage as organic amendment for particular uses
(e.g. landfill and land restoration). On the other hand the dry fraction is landfilled or used to produce solid refuse fuel (SRF). More recently mechanical biological processes assumed different forms and have been classified on the basis of the presence or absence of physical separation of waste into different streams before the biological treatment. Therefore it was defined the mechanical-biological treatment with separate fluxes (MBTSF) and the mechanical-biological treatment with unique flux (MBTUF). The MBTSF consists in a mechanical pre-treatment of the waste (sieving) giving a wet (Ø < 50-80 mm; OM > 80 % w/w; moisture > 50 % v/v) and a dry (Ø > 50-80 mm; OM < 25 %; moisture < 25-28 %) fraction, and the successive biological treatment of the wet fraction. This treatment went on for several weeks using an aerobic biological treatment in order to reduce the content of putrescible organic fraction leading to a high degree of biological stability (biostabilized product). The length of the biological treatment can vary, so that a biostabilized product shows different degree of biological stability. In the MBTUF process the entire waste after a bland mechanical treatment used to reduce waste size, is processed by a biological process. Depending on the process management (air, temperature and moisture management) fast and long biological treatments can be indicated (TAMBONE ET AL., 2011). A fast biological process gives a welldried material with a high calorific value and a low degree of biological stability. In this case, the fate of the biodried material is the production, after refining, of SRF. Long biological process gives a product characterized by low calorific value (depending on the process) and high biological stability (Figure 3).



Copyright: © Arbeitsgemeinschaft Stoffspezifische Abfallbehandlung ASA e.V.
Quelle: 9. Recyclingtage 2012 (September 2012)
Seiten: 9
Preis: € 4,50
Autor: Prof. Fabrizio Adani

Artikel weiterleiten In den Warenkorb legen Artikel kommentieren


Diese Fachartikel könnten Sie auch interessieren:

Overview of the Waste Management Situation and Planning in Greece
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Waste management has been recognized as one of the most pressing problems in Greece suffering of a low level of organization and relying predominantly on semi-controlled landfills until the end of the previous century [9]. Nevertheless improvements have been made during the last twenty years making the solid waste management in Greece a well-structured, organized and environmentally responsible activity with specific goals, mostly in the urban areas. However, there is a big need of changing the waste Management model. The development of efficient use of resources is the mean of realizing this vision. The transformation of the economy towards a resource-efficient direction will lead to increased competitiveness and new sources of growth and jobs through cost reduction through improved efficiency, commercialization of innovations and better management of resources throughout the duration of cycle life.

Wrong Tracks in Waste Management
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Waste Management is ubiquitous in our everyday life. Economic prosperity and the abundance of materialistic goods imply the generation of waste. In parallel the public awareness for environmentally sound solutions in the field of waste management is raising. This context imposes challenging conditions for political leaders. Often politicians are confronted to take decisions about concepts or investments in waste management without independent expertise. They are approached by vendors of waste treatment technologies or concepts, claiming high environmental and energetic performance, combined with profitable cost – benefit rates.

Measures to Implement an Advanced Waste Management System in the Czech Republic
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
The Czech Republic is now preparing the new complete revision of waste law. The transformation of the waste management into the circular economy started through the legislative process in June 2016. Waste management plan of the Czech Republic for 2015 to 2024 clearly specifies waste strategy and priorities for the country. Thus, in the Act on waste the ban on landfilling of recyclable and recoverable waste in 2024, obligatory separate collection of main municipal waste streams including biowaste since 2015 and currently proposed increase of waste landfilling tax with strict recycling targets already in 2018 are only the first milestones leading to smarter waste future in the Czech Republic.

Future Development of Waste Management in China According to the 13th Five-Year Plan
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Municipal solid waste (MSW) known as trash or garbage consists of food waste, paper, cardboard, plastics, PET, glass, textiles, metals, wood and leather, nappies, slug, ash, etc. are arising from human and animal activities. The rapid development and urbanization of China have resulted in an increasing volume of MSW. So the problem of MSW management has become a major social problem, but one the other hand, because of their intrinsic properties, MSW are often reusable and may be considered a resource for energy recovery. The delivering quantity of household waste averages 179 million tons in China, and the amount of untreated MSW over the years has reached 7 billion tons.

bifa-Text Nr. 67: Umweltrisiken der Nanotechnologie: Sicherung der Kreislaufwirtschaft mit biologischen Testverfahren
© bifa Umweltinstitut GmbH (3/2016)
Es wurde vom bifa Umweltinstitut die Wirkung ausgewählter Nanomaterialien auf aerobe und anaerobe Abbauvorgänge in verschiedenen biologischen Testverfahren untersucht.

Name:

Passwort:

 Angemeldet bleiben

Passwort vergessen?

Der ASK Wissenspool
 
Mit Klick auf die jüngste Ausgabe des Content -Partners zeigt sich das gesamte Angebot des Partners
 

Selbst Partner werden?
 
Dann interessiert Sie sicher das ASK win - win Prinzip:
 
ASK stellt kostenlos die Abwicklungs- und Marketingplattform - die Partner stellen den Content.
 
Umsätze werden im Verhältnis 30 zu 70 (70% für den Content Partner) geteilt.
 

Neu in ASK? Dann gleich registrieren und Vorteile nutzen...