Impact of sludge mechanical behaviour on spatial distribution parameters obtained with centrifugal spreader

P. Héritier (1) , J.C. Roux (1) , E. Dieudé-Fauvel (1)

1 UR TSCF - Technologies et systèmes d'information pour les agrosystèmes

The impact of pasty materials rheological behaviour on spatial distribution parameters obtained with centrifugal spreader, i.e. spinning disc system, was studied. Kaolin suspensions were used. To model their rheological properties, a Herschel-Bulkley equation was used, which is consistent with the literature. Experiments were performed with a specific spreading device (a vane with no disc) and with the CEMOB, a bench dedicated to the analysis of organic fertilisers spreading. Results showed that radial distribution of the 3D spread patterns is clearly dependent on size and density of the particles, both of them being related to the material consistency. Angular distribution also tends to follow similar tendencies. This study presents a new approach to analyse organic spreading and opens the way to more developments.

Mots clés: RHEOLOGIE; EPANDAGE DES BOUES; SLUDGE RHEOLOGICAL BEHAVIOUR; CENTRIFUGAL SPREADING; RADIAL AND ANGULAR DISTRIBUTION

Domaines: Sciences de l'environnement

P. Héritier, J.C. Roux, E. Dieudé-Fauvel. Impact of sludge mechanical behaviour on spatial distribution parameters obtained with centrifugal spreader. AgEng 2010, International Conference on Agricultural Engineering, Sep 2010, Clermont-Ferrand, France. p. - p. ⟨hal-00529151⟩