Effects Of MSW Selective Collection On
Waste-to-energy Strategies
Author(s)
E. C. Rada
Abstract
This paper analyses the effects of the evolution of the selective collection of
municipal solid waste on the local strategies for their energy valorization,
referring to a case study where high efficiencies of source separation have been
reached thanks to a two-decade effort. Four years were characterized as
representative of significant moment in the local waste management history. The
case study area concerns a province in the North of Italy where particular
attention has been put to the organization of selective collection. The economy of
the area is typical of a high-income country for all the analyzed period. As
expected, these characteristics gave a good steadiness to the composition of
municipal solid waste, but the variability of selective collection (which increased
its efficiency year by year) affected year by year the characteristics of the
residual municipal solid waste. The high efficiency of selective collection that
the latest data pointed out causes an indirect modification of the residual
municipal solid waste that today is similar to a solid recovered fuel. In spite of its
high Lower Heating Value, the energy exploitable, compared to the one of the
municipal solid waste generated, is significantly reduced as an effect of source
separation (of fractions with significant energy content). Moreover, the reduced
power (GJ per year) associated to the present residual municipal solid waste
decreases the scale of the provincial plant to a value that must be carefully
analyzed in terms of economic viability. From another point of view, the
alteration of the residual municipal solid waste characteristics makes it similar to
a solid recovered fuel even without pre-treatments. The option for its cocombustion
in existing industrial plants (cement factories, thermal power plants,
etc.) should be analyzed comparatively.
Keywords: MSW, selective collection, SRF, waste-to-energy.
Keywords
Keywords: MSW, selective collection, SRF, waste-to-energy.
Related Book
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