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Low Cost Real Time Sorting of In-shell Pistachio Nuts from Kernels
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2007 ASAE Annual Meeting 076239.(doi:10.13031/2013.23001)
Authors: Eric S Jackson, Ron P Haff
Keywords: spectroscopy, pistachios, kernels, in-shell, sorting, real time
A high speed sorter for separating in-shell pistachio nuts from kernels is reported. Testing indicates 95% accuracy in removing kernels from the in-shell stream and 100% accuracy for the in-shells out of 1000 samples tested. Testing with 1000 each of in-shell, shell halves, and kernels resulted in an overall error of 3.3%, about twice the overall error rate achieved using a commercially available dual band VIS-NIR sorting device. The cost of materials for the sorter reported here was less than $500 US, compared to upward of $100,000 for commercially available sorters. The new sorter thus has approximately double the error rate while achieving a roughly two hundred fold savings in cost compared to currently used equipment. Since existing sorters can be trained to sort a variety of product streams, implementation of the new device in pistachio plants could free up machines for other sorting tasks, thus reducing the overall cost of pistachio processing.(Download PDF) (Export to EndNotes)