Material and energy recovery in integrated waste management systems: Project overview and main results

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2011.04.016· OSTI ID:21578479

Consonni, Stefano ^[1]; Giugliano, Michele ^[2]; Massarutto, Antonio ^[3]; Ragazzi, Marco ^[4]; Saccani, Cesare ^[5]

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1. Department of Energy, Politecnico di Milano, Via Lambruschini 4, 20156 Milan (Italy)
2. DIIAR, Environmental Section, Politecnico di Milano, P.za L. Da Vinci 32, 20133 Milan (Italy)
3. Dse, Universita degli Studi di Udine and IEFE, Via Tomadini 30/a, 33100 Udine (Italy)
4. Department of Civil and Environmental Engineering, University of Trento, Via Mesiano 77, 38123 Trento (Italy)
5. DIEM, University of Bologna, Viale Risorgimento 2, 40136 Bologna (Italy)

Highlights: > The source separation level (SSL) of waste management system does not qualify adequately the system. > Separately collecting organic waste gives less advantages than packaging materials. > Recycling packaging materials (metals, glass, plastics, paper) is always attractive. > Composting and anaerobic digestion of organic waste gives questionable outcomes. > The critical threshold of optimal recycling seems to be a SSL of 50%. - Abstract: This paper describes the context, the basic assumptions and the main findings of a joint research project aimed at identifying the optimal breakdown between material recovery and energy recovery from municipal solid waste (MSW) in the framework of integrated waste management systems (IWMS). The project was carried out from 2007 to 2009 by five research groups at Politecnico di Milano, the Universities of Bologna and Trento, and the Bocconi University (Milan), with funding from the Italian Ministry of Education, University and Research (MIUR). Since the optimization of IWMSs by analytical methods is practically impossible, the search for the most attractive strategy was carried out by comparing a number of relevant recovery paths from the point of view of mass and energy flows, technological features, environmental impact and economics. The main focus has been on mature processes applicable to MSW in Italy and Europe. Results show that, contrary to a rather widespread opinion, increasing the source separation level (SSL) has a very marginal effects on energy efficiency. What does generate very significant variations in energy efficiency is scale, i.e. the size of the waste-to-energy (WTE) plant. The mere value of SSL is inadequate to qualify the recovery system. The energy and environmental outcome of recovery depends not only on 'how much' source separation is carried out, but rather on 'how' a given SSL is reached.

• OSTI ID: 21578479
• Journal Information: Waste Management, Vol. 31, Issue 9-10; Other Information: DOI: 10.1016/j.wasman.2011.04.016; PII: S0956-053X(11)00214-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING
POLICY AND ECONOMY
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ANAEROBIC DIGESTION
COMPOSTING
ECONOMICS
ENERGY EFFICIENCY
ENERGY RECOVERY
ENERGY TRANSFER
ENVIRONMENTAL IMPACTS
GLASS
ITALY
MASS TRANSFER
MATERIALS RECOVERY
METALS
OPTIMIZATION
ORGANIC WASTES
PLASTICS
RECYCLING
SOLID WASTES
BIOCONVERSION
DEVELOPED COUNTRIES
DIGESTION
EFFICIENCY
ELEMENTS
EUROPE
MANAGEMENT
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PROCESSING
SYNTHETIC MATERIALS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WESTERN EUROPE