Kohesi: Jurnal Sains dan Teknologi

Articles

Vol. 10 No. 8 (2026): Kohesi: Jurnal Sains dan Teknologi, ISSN 3025-1311

PENGARUH KETEBALAN MINYAK DI CONTINIOUS SETTLING TANK (CST) TERHADAP MUTU CPO DI PT PERKEBUNAN NUSANTARA IV UNIT KEBUN DAN PKS ADOLINA

Submitted
January 12, 2026
Published
2026-01-12

Abstract

Ketebalan lapisan minyak (oil layer) dalam Continious Settling Tank (CST) merupakan parameter kritis dalam proses pemisahan minyak, air, dan sludge secara gravitasi. Ketebalan ini berpengaruh langsung terhadap efisiensi pemisahan kotoran dan kadar air dalam Crude Palm Oil (CPO) yang dihasilkan. Penelitian ini bertujuan untuk menganalisis pengaruh ketebalan lapisan minyak (oil layer) di Continious Settling Tank (CST) terhadap kadar air dan kadar kotoran dalam Crude Palm Oil (CPO) yang dihasilkan di PTPN IV PKS Adolina. Data diperoleh melalui pengamatan langsung dan pengambilan sampel minyak dari CST sebelum dan setelah proses pengeringan vakum (vacuum drier) selama periode 4–9 Agustus 2025. Hasil penelitian menunjukkan bahwa kadar air dan kadar kotoran CPO sebelum proses vakum rata-rata sebesar 0,62% dan 0,048%, sedangkan setelah proses vakum menjadi 0,19% dan 0,024%. Nilai ini masih berada di atas standar mutu perusahaan, yaitu kadar air maksimal 0,15% dan kadar kotoran maksimal 0,020%. Ketebalan minyak di CST yang ideal berada pada kisaran 30–50 cm. Ketebalan di bawah 30 cm, terutama pada saat start pengolahan (25 cm), cenderung menghasilkan kadar kotoran yang lebih tinggi. Dalam hal ini  ketebalan minyak di CST berpengaruh signifikan terhadap mutu CPO, khususnya dalam menekan kadar kotoran. Untuk meningkatkan kualitas CPO, disarankan agar ketebalan lapisan minyak di CST dijaga minimal 30 cm dan dilakukan pemeliharaan rutin pada peralatan stasiun klarifikasi, terutama CST dan vacuum drier.

Kata kunci: CPO; CST; ketebalan minyak; kadar air; kadar kotoran; mutu minyak.

 

 

 

 

Abstract

The thickness of the oil layer in the Continuous Settling Tank (CST) is a critical parameter in the process of separating oil, water, and sludge by gravity. This thickness directly affects the efficiency of separating impurities and the water content in the produced Crude Palm Oil (CPO). This study aims to analyze the effect of the oil layer thickness in the Continuous Settling Tank (CST) on the water content and impurity levels in the Crude Palm Oil (CPO) produced at PTPN IV PKS Adolina. Data were obtained through direct observation and sampling of oil from the CST before and after the vacuum drying process during the period of August 4-9, 2025. The results show that the water content and impurity levels of CPO before the vacuum process averaged 0.62% and 0.048%, while after the vacuum process became 0.19% and 0.024%. These values still exceed the company’s quality standards, which are a maximum water content of 0.15% and a maximum impurity level of 0.020%. The ideal oil thickness in the CST ranges from 30 to 50 cm. Thickness below 30 cm, especially at the start of processing (25 cm), tends to produce higher dirt levels. In this case, the oil thickness in the CST significantly affects the quality of CPO, particularly in reducing the dirt content. To improve the quality of CPO, it is recommended that the thickness of the oil layer in the CST is maintained at a minimum of 30 cm, and routine maintenance is performed on the clarification station equipment, especially the CST and vacuum dryer. Keywords: CPO, CST, oil thickness, moisture content.

Keywords: CPO; CST; oil thicknes; moisture content; dirt content; oil quality.

References

  1. Andreono, R. (2024). Study Of Oil Extraction Effectiveness In Continuous Settling Tank Using Float Device. Jurnal Agro Fabrica, 6(2), 60-65.
  2. Manalu, I. S. (2023). Potensi Kerugian Ekonomi Akibat Kehilangan Minyak Sawit Pada Limbah Cair Dari Unit Sludge Separator Di Ptpn Iv Kebun Adolina, Perbaungan (Doctoral Dissertation, Fakultas Teknik, Universitas Islam Sumatera Utara).
  3. Rahardja, I. B., & Darmawan, A. (2020). The Effect Of Oil Thickness In The Cylindrical Settling Tank On The Moisture And Impurities Of Crude Palm Oil (Cpo). Journal Of Applied Sciences And Advanced Technology, 3(1), 21-28.
  4. Reza, F. (2022). Pengaruh Kecepatan Putaran Agitator Terhadap Proses Pemisahan Minyak Dan Lumpur Di Unit Continuous Settling Tank. Atds Saintech Journal Of Engineering, 3(1), 9-13.
  5. Syahputra, A. (2023). Kajian Oil Losses Sitinjak, A. A., Mustakim, M., & Reza, F. (2022). Analisis Hubungan Kecepatan Putaran Agitator Terhadap Kadar Minyak Hasil Prototype Rangkaian Alat Continuous Settling Tank. Jurnal Ilmiah Teknologi Dan Rekayasa, 27(2), 135-143.
  6. Pada Underflow Continuous Settling Tank (Cst) Pabrik Kelapa Sawit (Studi Kasus Pks Ptpn Iv Mayang) (Doctoral Dissertation, Institut Teknologi Sains Bandung).

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