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All Journal International Journal of Science, Engineering and Information Technology Jurnal Polimesin
Khamdi Mubarok
University of Trunojoyo Madura
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Evaluation of diaper waste combustion efficiency in a steam-pressed oil waste stove-based incinerator with two air intakes Ibnu Irawan; Khamdi Mubarok; Rifky Maulana Yusron; Rullie Annisa
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8631

Abstract

Waste such as used diapers remains a persistent environmental challenge that requires effective waste management solutions. This study aims to evaluate the performance and efficiency of an incinerator using diapers as the primary waste material. An incinerator can reduce waste volume and mass by converting it into ash. This experimental study using used oil and cooking oil as fuels for a steam-pressurized burner system. Variations in two-tiered air intakes are also used as a measure of evaluation of air velocity, which are 6 m/s, 8 m/s, and 10 m/s. The results demonstrates that for used oil fuel, average combustion temperatures of 376°C, 405°C, and 452°C were obtained at 6, 8, and 10 m/s, with combustion times of 97, 75, and 56 min, respectively. Residual ash masses were 1.01, 0.80, and 0.60 kg. For used cooking oil fuel, average temperatures reached 325°C, 354°C, and 387°C, with combustion times of 120, 107, and 86 min, respectively. Residual ash masses were 1.20, 1.08, and 0.85 kg. The results show that increasing air velocity significantly improved combustion temperature and reduced burning time for both fuels, while its effect on ash residue was less pronounced. Used oil produced higher combustion temperatures and faster waste reduction, whereas the highest thermal efficiency of 70% was achieved using used cooking oil at an air velocity of 10 m/s.
Effects of Particle Size and Compaction Pressure on the Physical and Energy-Related Properties of Biopellets from Casuarina Equisetifolia Khamdi Mubarok; Teguh Prasetyo; M. Abdul Ghoni
International Journal of Science, Engineering, and Information Technology Vol 10, No 1 (2025): IJSEIT volume 10 Issue 1 December 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/ijseit.v10i1.33397

Abstract

The increasing demand for renewable energy requires alternative resources to reduce fossil fuel dependency and mitigate climate change. Biomass has emerged as a promising solution due to its wide availability and favorable combustion characteristics. Casuarina equisetifolia, a fast-growing coastal species abundant in Indonesia, remains underutilized despite its potential as a bioenergy feedstock. This study investigates the effects of particle size variation (20, 40, and 60 mesh) and compaction pressure (2, 3, and 4 tonf) on the quality of biopellets produced from Casuarina equisetifolia. Biomass powder was mixed with 10% tapioca binder, compacted using a hydraulic press with a cylindrical mold, and oven-dried at 150 °C for 30 minutes. Pellet quality was evaluated through moisture content, density, and calorific value following SNI standards. The data were statistically analyzed using two-way ANOVA. The ANOVA results confirmed that both particle size and compaction pressure had significant effects (p 0.05) on all response variables. Moisture content decreased with finer particles and higher pressure, with the lowest value of 5.27% obtained at 60 mesh and 4 tonf. Density increased under the same conditions, reaching 1.191 g/cm³. Calorific value also varied significantly, with the maximum of 4697 cal/g observed at 20 mesh and 4 tonf. These findings demonstrate that optimization of particle size and compaction pressure is essential to improve both physical and energy-related properties of biopellets. The results highlight the potential of Casuarina equisetifolia as a sustainable biomass feedstock to support Indonesia’s Net Zero Emission 2060 target.
Co-Authors Ibnu Irawan M. Abdul Ghoni Rifky Maulana Yusron Rullie Annisa Teguh Prasetyo