Nell’ottica del recupero dei residui agricoli per la produzione bioenergetica, le ceppaie residuali potrebbero rappresentare una valida fonte di approvvigionamento. Diventa quindi necessario individuare macchinari idonei al recupero di questi residui e quantificare le loro rese energetiche.
Generally, the stumps removal from an end-of-life orchard is a time consuming work that requires high management costs. Despite these problems, the operation is necessary for restoring suitable soil conditions for arboreal or herbaceous crops. This study consists of two independent parts: the first part is focused on the comparison of the work performed by a stumps puller prototype and a traditional excavator. The second part of the study deal with the energetic characterization of the extracted roots. The goal of the work is to show the work quality of mechanization systems for raw material supply, but at the same time it is intended to show the stump energy potential in the agro-energy chain. The work quality of the machines was evaluated considering the capacity of each machine to produce material as much free of soil as possible after the extraction. The energetic characterization was evaluated with respect to moisture content, gross and net calorific value, chemical composition, and ash content. Wood/soil ratio was slightly higher in stumps extracted with the stump puller prototype. The energetic characterization revealed high ash content, while the other parameters resulted in line with those of typical energetic broadleaves. The study highlights also the necessity of outdoor stumps storage because immediately after extraction they still include too much soil and moisture for efficient conversion. Further studies should address the effect of open air storage, so that one can balance reduced soil contamination and moisture content with dry matter losses.
|Autori:||Pari, L.;Gallucci, F.;Picchi, G.;Spinelli, R.;Scarfone, A.;Barontini, M.|
|Data di pubblicazione:||2014|
|Titolo:||Le ceppaie come fonte alternativa di biomassa da combustione|
|Rivista:||SHERWOOD. FORESTE ED ALBERI OGGI|
|Appare nelle tipologie:||1.1 Articolo in rivista|