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All Journal RESWARA: Jurnal Riset Ilmu Teknik
Ananda Braga Raihan
Departement of Plantation Product Preprocessing Technology, Institut Teknologi Sawit Indonesia, Medan, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Production of Bioethanol from Oil Palm Stumps with Varying Levels of Ammonium Sulfate ((NH₄)₂SO₄) Added through a Fermentation Process Using Tape Yeast Ananda Braga Raihan; Heri Purwanto
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.658

Abstract

Oil palm trunk is a lignocellulosic biomass with significant potential as a raw material for bioethanol production due to its cellulose and hemicellulose content, which can be converted into fermentable sugars. This study aimed to determine the effect of ammonium sulfate ((NH₄)₂SO₄) supplementation on bioethanol production from oil palm trunk through a fermentation process using tape yeast. The research procedure included raw material preparation, hydrolysis to produce simple sugars, fermentation using tape yeast, and analysis of the resulting bioethanol content. Ammonium sulfate was used as a nitrogen source to support the growth and metabolic activity of microorganisms during fermentation. Different concentrations of ammonium sulfate were applied to obtain optimal fermentation conditions. The results showed that the addition of ammonium sulfate affected bioethanol production. Adequate nitrogen availability enhanced microbial growth, resulting in a more efficient conversion of sugars into ethanol. However, excessive nutrient addition could reduce fermentation efficiency by disrupting microbial activity. The findings indicate that oil palm trunk can be used as an alternative feedstock for bioethanol production, and that an appropriate concentration of ammonium sulfate can improve fermentation performance and increase bioethanol yield.
Co-Authors Heri Purwanto