Effect of Increasing the Number and Changing the Diameter of Nozzle Holes on the Reduction of Moisture Content in CPO Ex Vacuum Dryer at PT Inti Indosawit Subur PMKS Buatan Dua

Mhd Fauzan Affandi; Tengku Rachmi Hidayani; Taranipa Marfitania

doi:10.32734/jcnar.v8i2.27041

Authors

Mhd Fauzan Affandi Oil Palm Agribusiness Study Program, Politeknik Teknologi Kimia Industri Medan, Medan, 20136, Indonesia
Tengku Rachmi Oil Palm Agribusiness Study Program, Politeknik Teknologi Kimia Industri Medan, Medan, 20136, Indonesia
Taranipa Marfitania Oil Palm Agribusiness Study Program, Politeknik Teknologi Kimia Industri Medan, Medan, 20136, Indonesia

DOI:

https://doi.org/10.32734/jcnar.v8i2.27041

Keywords:

Moisture Content of CPO, Vacuum Dryer, Nozzle, Paired Sample T-Test, Modification

Abstract

The moisture content of Crude Palm Oil (CPO) at PT Inti Indosawit Subur, PMKS Buatan Dua, during August and September 2025 averaged 0.29%, exceeding the company's internal standard of below 0.25%. One of the efforts made to reduce the moisture content was modifying the vacuum dryer nozzle, which was found to be suboptimal, by increasing the number of nozzle holes from 9 to 10 and reducing the hole diameter from 7 mm to 6 mm. The data used consisted of 56 secondary data samples before modification (August-October 2025) and 56 samples after modification (October-December 2025), analyzed using descriptive statistics, a normality test, and a paired sample T-test. The results showed that the average moisture content decreased from 0.290% to 0.221% after the modification, a reduction of about 23.6%. The paired sample T-test produced a significance value (2-tailed) of < 0.05, so H0 was rejected, indicating that the increase in the number of nozzle holes and the reduction of their diameter had a statistically significant effect in reducing the moisture content of ex-vacuum dryer CPO at PT Inti Indosawit Subur PMKS Buatan Dua.

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