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Energy and pressure requirements for compression of swine solid fraction compost (Contributo in atti di convegno)
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- Energy and pressure requirements for compression of swine solid fraction compost (Contributo in atti di convegno) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.4081/jae.2013.(s1):e105 (literal)
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Niccolò Pampuro, Alessio Facello, Cavallo Eugenio, (2013)
Energy and pressure requirements for compression of swine solid fraction compost
in 10th Conference of the Italian Society of Agricultural engineering, Viterbo, 8-12 Settembre 2013
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- Niccolò Pampuro, Alessio Facello, Cavallo Eugenio, (literal)
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- Horizons in agricultural, forestry and biosystem engineering (literal)
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- Titolo
- Energy and pressure requirements for compression of swine solid fraction compost (literal)
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- Danilo Monarca, Massimo Cecchini (literal)
- Abstract
- The excessive amount of pig slurry spread on soil has contributed to
nitrate water pollution both in surface and in ground waters, especially
in areas classified as vulnerable zones to nitrate in accordance with
European Regulation (91/676/CEE). Several techniques have been
developed to manage livestock slurries as cheaply and conveniently as
possible and to reduce potential risks of environmental pollution.
Among these techniques, solid-liquid separation of slurry is a common
practice in Italy. The liquid fraction can be used for irrigation and the
solid fraction, after aerobic stabilization, produces an organic compost
rich in humic substances. However, compost derived from swine solid
fraction is a low density material (bulk density less than 500 kg?m-3).
This makes it costly to transport composted swine solid fraction from
production sites to areas where it could be effectively utilized for
value-added applications such as in soil fertilization. Densification is
one possible way to enhance the storage and transportation of the
compost. This study therefore investigates the effect of pressure (20-
110 MPa) and pressure application time (5-120 s) on the compaction
characteristics of compost derived from swine solid fraction. Two different
types of material have been used: composted swine solid fraction
derived from mechanical separation and compost obtained by
mixing the first material with wood chips. Results obtained showed
that both the pressure applied and the pressure application time significantly affect the density of the compacted samples; while the specific
compression energy is significantly affected only by the pressure.
Best predictor equations were developed to predict compact density
and the specific compression energy required by the densification
process. The specific compression energy values based on the results
from this study (6-32 kJ?kg-1) were significantly lower than the specific
energy required to manufacture pellets from biomass feedstock (typically
19-90 kJ?kg-1). (literal)
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