M. Dentice d’Accadia, A. Palombo, M. Sasso, L. Vanoli 181 ENERGETIC AND ECONOMIC EVALUATION OF INTEGRATED SYSTEMS FOR MUNICIPAL SOLID WASTE MANAGEMENT: A CASE STUDY FOR CAMPANIA REGION M. Dentice d'Accadia*, A. Palombo*, M. Sasso*, L. Vanoli** * DETEC - Università degli Studi di Napoli Federico II, P.le Tecchio, 80 - 80125 Napoli, Italy ** DiMSAT - Università degli Studi di Cassino, via Di Biasio, 43 - 03043 Cassino (Frosinone), Italy ABSTRACT In order to solve the problem represented by Municipal Solid Waste (MSW) management, it is now common to utilize an integrated management scheme. Integrated systems for MSW management are extremely complex. However, they also represent a very interesting potential resource, from both energetic and economic viewpoints. Thus, a correct planning of the integrated cycle as a whole is of fundamental importance. The paper is focused on the development of a model for the analysis and optimization of integrated cycles for MSW treatment. This objective is pursued through an assessment of the entire MSW life cycle. An application is also presented, regarding the case-study of an Italian Region (Campania), which appears of particular interest, due to the recent start of a new regional plan for waste treatment, recycling and disposal. Keywords: MSW management, integrated scheme, energy saving, Net Present Value 1. INTRODUCTION The new attitude to consider waste as a resource and the need for a strong and quick reduction of the number of landfills, have led to the wide use of integrated systems for Municipal Solid Waste (MSW) management (Wilson, 1981; Tchobanoglous et al ., 1993). An integrated system implicates recovery of materials through separate collection, as well as energy recovery, available by burning the residual waste "as is" or by production and combustion of RDF (Refuse Derived Fuel). Waste management systems must be: - in respect of law restriction, - flexible and safe, - environmentally compatible, by minimization of local emissions and maximization of the avoided ones, due to material and energy recoveries, - economically and socially sustainable, also considering the overall costs of operating the system and the effects on the employment. The planning of the waste management must: - guarantee strong flexibility of the treatment and disposal system in order to fit to different outputs of separate collection, waste evolution, and new technology, - assure waste disposal in any case, in order to avoid emergencies. In the present paper, firstly a general model is introduced, for the energetic and economic evaluation of integrated MSW management systems and the single nodes into which they can be subdivided: production centers, facilities for separate or gross collection, treatment, recycling, energy production. Energetic analysis is performed by evaluating all input/output energy flows for the systems under study, and comparing them with those of conventional systems for energy production and distribution. Economic evaluations are made in terms of Net Present Value (NPV) of the incremental cash flows produced by waste management for each of the following three main divisions: waste-to-energy, secondary materials and compost, and for each group of activities connected to the integrated cycle, according to their distribution among single operators. The strict interdependence between all sectors is taken into account in both the energetic and economic evaluations. Finally, the model is applied to a case study regarding the Campania Region.