Project Detail
Macadamia Nut Sheller
Winit Chinsuwan / Suraweth Krishnasreni
Source of Funds
MTEC National Science and Technology Development Agency
Macadamia nut (Macadamia integrifolia and M. tetraphylla) is considered to be one of the world's finest dessert nuts. The macadamia nut comprises of a hush, a shell and the nut kernel. The shell contains about 2.8% oil and the hulls contain some 14% of substances suitable for tanning leather. The edible part, the kernels, contain between 70 and 75% fat, it maybe eaten raw, roasted and salted and can be used in cakes, confectionary and ice cream. Macadamia was first introduced to Thailand in 1955 and was considered as a neglected crop for a long time. Recently it has been classified by the Department of Agriculture as on of the most promising tree crop. Macadamia plantation has been now being promoted by the Department of Agriculture as one of the most promising tree crop. Macadamia plantation has been now being promoted by theRoyal Project for reforestation program. With this promotion the plantation has been expanded by private sector. The policy of the Department of Agriculture is to develop this crop for agro-industry. At present there are 18 research stations over the country workingon macadamia. However, the attempts are mainly focused on crop adapation and planting without research and develpment work on processing for industry. For processing, macadamia nuts which fall from the tree after reaching maturity are picked up from the ground. The green husks are removed and the husked nuts then go through a series of drying operations. When the moisture int he nut has been reduced, the nut is cracked. In order to facilitate the cracking and obtain a high recovery of whole kernels, a pre-cracking operation of releasing the dernels from their shells is practiced. Macadamia nuts are sold primarily as a processed (cracked) rather than a fresh (in-shell) product because of their poor keeping quality at room temperature, and the difficulty in cracking the shells without special equipment. Cracking the shell enclosing the kernel is one of the major operational cost factors in the production of macadamia nuts, primarily because of unsatisfactorily recovery of the kernels. With the existing plantation of macadamia in Thailand and its abvious commercial importance, the objective of this project is to develop an appropriate small scale macadamia nut sheller and processing method and to extend its use for small scale macadamia nut industry.
Last Updated : 27/07/2554

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