Design and Technical Evaluation of the PTR-TETA20 Macadamia Nut (macadamia integrifolia) Sheller

Authors

Ruland Rantung , Dedie Tooy , Putri Amelia , Lucia Cecilia Mandey

DOI:

10.29303/jppipa.v11i6.10969

Published:

2025-06-30

Issue:

Vol. 11 No. 6 (2025): June

Keywords:

Agricultural machinery, Drying methods, Efficiency analysis, Material handling, Mechanical design, Nut processing, Post-harvest technology

Research Articles

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How to Cite

Rantung, R., Tooy, D., Amelia, P., & Mandey, L. C. (2025). Design and Technical Evaluation of the PTR-TETA20 Macadamia Nut (macadamia integrifolia) Sheller . Jurnal Penelitian Pendidikan IPA, 11(6), 478–485. https://doi.org/10.29303/jppipa.v11i6.10969
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Abstract

Macadamia (Macadamia integrifolia) is a high-value crop not widely known in Indonesia and still processed using conventional shelling methods that are time-consuming and inefficient. This study aimed to design and evaluate the PTR-TETA20 macadamia nut sheller to improve post-harvest efficiency. The research was conducted from May to July 2024 at the Faculty of Agriculture, Sam Ratulangi University. The methodology involved the design, construction, and performance testing of the machine using experimental methods and descriptive data analysis. The PTR-TETA20, measuring 30 × 23 × 113 cm and powered by a 1/4 HP motor with a pulley and V-belt system at 1467 RPM, was tested using 1 kg of macadamia nuts in three repetitions. The average working capacity reached 38.43 kg/hour, with a yield of 92.52%. Nut integrity was recorded as 40.22% whole, 36.10% halved, and 23.66% broken. Moisture content was 2.6% (whole), 2.56% (halved), 2.83% (broken), and 9.52% (shells). The results indicate that PTR-TETA20 offers a practical shelling solution for small-scale producers. However, machine performance can be improved by optimizing roller spacing and ensuring uniform nut drying.

References

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Author Biographies

Ruland Rantung, Universitas Sam Ratulangi

Program Secretary of Department of Agricultural Engineering, Faculty of Agriculture, Sam Ratulangi University, Manado, Indonesia

Dedie Tooy, Universitas Sam Ratulangi

Dean of Department of Agricultural Engineering, Faculty of Agriculture, Sam Ratulangi University, Manado, Indonesia

Putri Amelia, Universitas Sam Ratulangi

Undergraduate Student of Department of Agriculture, Sam Ratulangi University

Lucia Cecilia Mandey, Universitas Sam Ratulangi

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Copyright (c) 2025 Ruland Rantung, Dedie Tooy, Putri Amelia, Lucia Cecilia Mandey

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