Ndjiya et al
Greener Journal of Agricultural Sciences Vol. 2 (4), pp. 152-161, August 2012
A mechanical blender for homogenization of the pulps of guava
Ndjiya Ngasop1, Haman–Djalo2, Nso Emmanuel1 and
1Department of Process Engineering, National Advanced School of Agro-Industrial Sciences (ENSAI), Ngaoundéré, Cameroon.
2Department of Physics, the Faculty of Science (FS), Ngaoundéré, Cameroon.
Corresponding Author’s Email: ndjiyangasop @ yahoo.fr
Conventional juices settle regardless of the production method used. In order to achieve a complete homogenization, it often requires chemical additives. In a world increasingly conscious of its food consumption, we expect to explore a new way of producing homogeneous juice, without additives, by using a mechanical mixer and refine it later with one of the new physical processes. Applied to guava pulp, the influence of the water / guava ratio at constant volume is an important factor through which several parameters were monitored. To achieve this, the quantification of the mechanical power of the mill allowed us to measure the actual energy required to obtain a product having a particle size distribution determined.
Thus the Reynolds number and the shear rate of the grinder with respect to the volume, the torque of the mill and the Reynolds number based on the rate were monitored. After having determined the volume range corresponding to the optimum grinding, particle size distribution at different positions of the mill has been mastered by the influence of dilution at constant volume.
Keywords: homogenization, guava, blender, mechanical power, shear rate.