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All Journal Jurnal Pengabdian kepada Masyarakat Abdi Jurnal Publikasi Journal of Engineering Science and Technology Management Jurnal Pengabdian Masyarakat dan Riset Pendidikan
Tambos August Sianturi
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Journal : Journal of Engineering Science and Technology Management

 1 
Analysis of the Effect of Boiling Time on Oil Yield Palm oil at PTPN IV Mayang Plantation Luat Surya Napitupulu; Tambos August Sianturi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.371

Abstract

The boiling process of fresh fruit bunches (FFB) at PTPN IV Kebun Mayang is carried out using a semi-automatic system using a horizontal steam pressure sterilizer. This study analyzed three boiling time programs, namely 85 minutes, 90 minutes, and 95 minutes, with a triple peak pressure system. The purpose of the study was to determine the most optimal boiling time to obtain the potential palm oil yield. The method used was a direct experiment with quantitative and qualitative observations of the potential of fresh fruit bunches (FFB) and oil yield. The results showed that the average RMS of the 85-minute experiment was 16.98%, the average RMS of the 90-minute experiment was 23.76%, and the average RMS of the 95-minute experiment was 19.44%. In conclusion, the 90-minute boiling time appears to provide the most balanced results. Boiling that is too short results in low yields while boiling that exceeds the optimum limit also tends to reduce the quality or amount of extractable yield.
The Effect of Freezing Time on the Melting Time of Ice Blocks at PT Siantar Ice Factory Calvin Klein Sitanggang; Tambos August Sianturi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.376

Abstract

The background of this study is based on the needs of the ice block industry for products with higher resistance to melting in order to maintain distribution quality and improve operational efficiency. This research aims to analyze the effect of freezing duration on the melting time of ice blocks and to determine the most optimal freezing time among 24 hours, 27 hours, and 30 hours. The research methodology employs a mixed-method approach through direct observation conducted during Field Work Practice (PKL). Quantitative data were obtained from measurements of the melting time of ice blocks produced under three different freezing durations with three repetitions, while qualitative data were collected from observations of the freezing process and the physical condition of the ice. The freezing process was carried out at a temperature range of −10°C to −15°C using a brine-based cooling system. The results indicate that freezing for 24 hours produces an average melting time of 8.5 hours, freezing for 27 hours results in an average melting time of 10.2 hours, and freezing for 30 hours results in an average melting time of 12.5 hours. These findings demonstrate that longer freezing durations lead to increased melting time of ice blocks. Freezing for 30 hours provides the longest melting time and is considered the most optimal in enhancing resistance to melting.
Co-Authors Anwar Hotris Simatupang Calvin Klein Sitanggang Christophe Jestius Sipayung Elfrido Lorensius Lumbangaol Jan Hary Siburian Jefri Ando Siadari Jose Mikael Saragih Luat Surya Napitupulu Naibaho, Winfrontstein Oges Ivendo Saragih Purba, Jhon Sufriadi Putra Samuel Manihuruk Rahul Depri Simanjuntak Surya Seftian Sidabalok Win Fronstein Naibaho