| Abstrakt: |
Due to economic, logistical and technological reasons it is not possible to recycle 100% of the recyclable fractions found in municipal solid wastes. In this sense, this work evaluated the energetic potential of discarded recyclable solid waste in the Recyclable Waste Sorting Center, located in the landfill of Santo André. Samples of wastes in natura and processed refuse-derived fuel (processed RDF) were analyzed. From the moisture, proximate analysis and calorific value data, it was possible to evaluate the potential of energetic exploitation of the discarded wastes. Comparison with data from the scientific literature corroborates the energetic potential described herein. For both types of wastes, there was no significant difference between the determined data (lower heating value of ~20 MJ/kg with ~11% of bottom ash), indicating that there is no need of processing to compound the RDF free of incombustible fractions, which would provide financial and labor cutbacks. Besides that, it was also verified that the evaluated samples are potential combustibles in incinerations systems, without the necessity of addition of an auxiliary fuel, once that the contents of moisture, ash and combustible materials are compatible with the limits estabilished by Tanner's diagram (≤ 50%, ≤ 60% and ≥ 25%, respectively). In this way, when recycling is not viable, the combustible products may be treated, processed and converted into fuel to be employed in processes of energy recovery, as gaseification and direct combustion, as suggested by the data acquired in this work, which denotes the combustible potential of discarded recyclable solid waste. [ABSTRACT FROM AUTHOR] |
