Physical characteristics of olive stone wooden residues: possible bulking material for composting process |
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Authors: | A G Vlyssides E M P Barampouti S Th Mai |
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Institution: | (1) School of Chemical Engineering, Athens, National Technical University of Athens, 9 Heroon Polytechniou Street, Zographou, 15700, Greece |
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Abstract: | The present work focuses on the study of the physical characteristics of olive stone wooden residues at the prospect of its
use as a bulking material in compost process. The physical characteristics that were studied according to particle mesh classification,
were the apparent density, porosity, water holding capacity, air free space and air pressure drop. From the experimental results,
it was proved that only the fraction of 6.8–12.5 mesh, which is 29.40% of the substrate, could maintain the moisture in the
optimum range 40–60%. The fraction of the particles of 2.6–23.6 mesh, which was 74.68% of the substrate, had appropriate porosity
for composting. It was also proved that for dried substrate and air velocity 300 m h−1, acceptable pressure drop (10 cm H2O m−1) was observed for the fraction of the particles of 2.6–27.5 mesh, which was 80.08% of the substrate, while for dried substrate
and air velocity 150 m h−1, the respective fraction was particles of 2.6–37.9 mesh which accounted for the 89.48% of the substrate. Conclusively, olive
oil processing solid residues have the physical characteristics, so as to be used for composting or as a substrate for co-composting
with high strength wastewater. |
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Keywords: | Bulking material Composting Olive oil processing Physical characteristics Solid residues |
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