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All Journal Jurnal Agro Fabrica
Muhammad Jumadil Alamsyah
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Chemical Engineering, Chemistry & Bioengineering Materials Science & Nanotechnology Mechanical Engineering

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PENGUJIAN PUTARAN THRESHER TERHADAP PEROLEHAN PEMBRONDOLAN TANDAN BUAH REBUS (TBR) PABRIK KELAPA SAWIT (PKS) DOLOK ILIR PTPN IV REGIONAL II Aisyah, Siti; Faisal, Busrizal; Muhammad Jumadil Alamsyah
Jurnal Agro Fabrica Vol. 7 No. 2 (2025): Desember 2025
Publisher : Institut Teknologi Sawit Indonesia (ITSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47199/jaf.v7i2.347

Abstract

This study aimed to determine the optimal rotational speed of the thresher in improving the stripping efficiency of sterilized oil palm fruit bunches. The thresher functions as a rotating drum that separates loose fruits from the bunch by lifting, striking, and pushing empty bunches toward the empty bunch conveyor, while the loose fruits fall through the drum grid and are conveyed to the digester. The research was conducted using a quantitative descriptive method at PT Perkebunan Nusantara IV Regional II Dolok Ilir Palm Oil Mill, Dolok Batu Nanggar District, Simalungun Regency, North Sumatra Province. Data collection at the thresher station was carried out for 20 days, from May 5 to May 24, 2025, including measurements of thresher rotational speed, grid spacing, and loose fruit diameter. The results showed that the optimal thresher rotational speed ranged between 23.8 and 23.9 rpm, with an average grid spacing of 4.51 cm and an average loose fruit diameter of 2.67 cm. The standard deviation of measurements was 0.42%, indicating high operational stability. Technically, the correlation between thresher rotational speed and loose fruit diameter was 21.24 rpm, while the technical deviation correlation was 12.24%..
Co-Authors Busrizal Faisal Siti Aisyah