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Equilibrium Moisture Content of Hazelnut Husks, Shells and Kernels

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2017 ASABE Annual International Meeting  1700658.(doi:10.13031/aim.201700658)
Authors:   David R Bohnhoff, Rhonda K Bohnhoff
Keywords:   hazelnuts, equilibrium moisture content, moisture content, water activity, nuts.

Abstract.

Hybrid hazelnuts clusters were hand-picked from shrubs in Wisconsin and immediately placed in 18 different controlled environments (6 different relative humidity levels at three different temperatures). After reaching moisture equilibrium with their environments, husks were separated from nuts, and nuts were cracked to determine equilibrium moisture content of the husks, shells and kernels. Under equilibrium conditions, kernel moisture content was found to be only 37% of that for shells, whereas equilibrium moisture contents for husks were on average 14% greater than those for shells. At a cluster moisture content of 0%, the average cluster mass was 32.9% husk, 43.9% shell and 23.2% kernel. Likewise, at a moisture content of 0% the average whole nut mass was 65.5% shell and 34.5% kernel.

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