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Comparison of impact hulling of almonds using 3 impellor geometries
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2016 ASABE Annual International Meeting 162459940.(doi:10.13031/aim.20162459940)
Authors: John M Fielke, Michael C Coates, Maryam Shirmohammadi
Keywords: Almonds, damage, hulling, impact, losses, shelling, trajectory.
This research shows that impact threshing of Nonpareil, Carmel and Marcona varieties is a viable process to achieve a high proportion of inshell almonds. The best hulling performance was achieved using early harvested fruit. Tests were undertaken using three different geometries of impellor blades. High speed video showed the different blade geometries created different fruit impact angles with the outer wall of the impact thresher.
For the soft shelled Nonpareil variety of almonds the impellor with radial blades created the most inshell with least creation of loose kernel. For the soft shelled Carmel variety the ultra backward blade with 60° backward facing blades performed the best. The work also highlighted that several lower energy impacts was preferred over one higher energy impact.(Download PDF) (Export to EndNotes)