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All Journal Jurnal Teknik Industri Terintegrasi (JUTIN)
Nisrina, Hernita Zaida
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Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Stabilisasi Bioetanol Terhadap Korosi Logam Menggunakan Inhibitor Alami Berbasis Minyak Pala Nisrina, Hernita Zaida; Alya, Nazwa; Ramadhan, Rizky Setiawan
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.54907

Abstract

This research evaluates the potential of nutmeg essential oil as an environmentally friendly corrosion inhibitor for carbon steel in a bioethanol medium. GC-MS analysis identified 23 compounds, with the major components including sabinene (21.3%), α-pinene (18.7%), β-pinene (12.4%), myristicin (8.9%), and limonene (7.2%). Weight loss testing over 90 days showed the control system had a corrosion rate of 2.847 mm/year, which significantly decreased to 0.412 mm/year with the addition of 750 ppm nutmeg oil, resulting in an optimal inhibition efficiency of 85.5%. Increasing the concentration to 1000 ppm did not provide a significant improvement, indicating adsorption saturation on the metal surface. Electrochemical characterization thru potentiodynamic polarization curves showed a shift in corrosion potential from -0.687 V to -0.523 V and a decrease in corrosion current density from 48.3 μA/cm² to 6.8 μA/cm² at the optimal concentration, confirming nutmeg oil as a mixed-type inhibitor. Electrochemical impedance spectroscopy showed an increase in polarization resistance from 245 Ω·cm² to 1,687 Ω·cm², consistent with the weight loss data.
Simulasi Monte Carlo dalam Estimasi Distribusi Pendapatan dan Evaluasi Kelayakan Finansial UMKM Teh Poci Bintang, Bintang; Alya, Nazwa; Nisrina, Hernita Zaida; Ramadhan, Risky Setiawan; Fachrezy, Galih
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.55892

Abstract

This study aims to analyze income distribution and evaluate the financial feasibility of Teh Poci MSMEs using a Monte Carlo simulation approach. The data consist of daily revenue over the last 30 days, which were processed to construct a probabilistic monthly income distribution through 10,000 simulation iterations. The results indicate that the average monthly revenue is approximately IDR 46.82 million, with a near-normal distribution and relatively low variability. The probability of achieving the target revenue of IDR 45 million exceeds 90%, while the Value at Risk (VaR) remains within an acceptable threshold. Sensitivity analysis reveals that small changes in daily average revenue significantly affect monthly projections. Overall, the Monte Carlo approach provides a comprehensive risk assessment framework and demonstrates that the Teh Poci MSME is financially feasible under normal operating conditions.
Co-Authors Alya, Nazwa Bintang Bintang Fachrezy, Galih Ramadhan, Risky Setiawan Ramadhan, Rizky Setiawan