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All Journal Agrointek agriTECH Proceeding of International Congress Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Journal of Food Technology and Agroindustry Dinamis IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Warta LPM
Dian I Y Ribka Stefanie Wongso, Paini Sri Widyawati, Tarsisius D B Fenny A K, Evelyn L W, Dian I Y
Program Studi Teknologi Pangan, Fakultas Teknologi Pertanian, Universitas Katolik Widya Mandala Surabaya, Jl. Dinoyo 42-44 Surabaya, 60265
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Fabrication and Experimental Evaluation of a Small-Scale Pyrolysis Reactor for Coconut Shell Charcoal Production Melvin Emil Simanjuntak; Jandri Fan H.T. Saragi; Muhammad Iqbal Murti; Prisca Caesa Moneteringtyas; Paini Sri Widyawati
DINAMIS Vol. 14 No. 1 (2026): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v14i1.24710

Abstract

The utilization of coconut shell biomass for small-scale charcoal production through pyrolysis offers a renewable energy alternative, yet the time-dependent evolution of charcoal properties during carbonization remains underexplored. This study aims to fabricate a small-scale fixed-bed pyrolysis reactor and experimentally evaluate the effect of pyrolysis time on coconut shell charcoal characteristics at a constant operating temperature of 400°C. The reactor was fabricated from carbon steel with an effective volume of 150.6 L. Pyrolysis experiments were conducted for 300 minutes, with charcoal samples collected at 30‑minute intervals. The results show that increasing pyrolysis time progressively reduced both charcoal yield and bulk density, with final values of 14.7 % and 6.67 kg/m³, respectively at 210 minutes, after which both stabilized. The carbonization process exhibited three distinct stages: early gradual devolatilization (30–120 min), rapid structural transformation (120–180 min), and stabilization (after 210 min). Visual observations revealed a transition from dark brown to deep black coloration with increasing residence time, followed by increased fragility at prolonged durations. The novelty of this work lies in the application systematic interval‑based sampling that reveals the dynamic evolution of charcoal properties as a function of residence time, rather than reporting only final product characteristics. These findings confirm that pyrolysis time is a key operational parameter and provide a practical basis for selecting optimal durations (120–180 min) to obtain structurally stable charcoal in small‑scale fixed‑bed reactors.
Analisis Kinerja Pengering Putar Bertenaga Surya untuk Pengeringan Jamur Tiram Menggunakan Dua Kolektor yang Ditutup dengan Plastik UV Melvin Emil Simanjuntak; Farhan Habib; Paini Sri Widyawati; Prisca Caesa Moneteringtyas; Agnes Br. Manurung
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.454

Abstract

Oyster mushrooms have a high moisture content, making them highly susceptible to postharvest deterioration. Solar energy-based drying offers an alternative way to extend shelf life while reducing energy use and environmental impact. This study evaluated the performance of a solar-powered rotary dryer equipped with two UV-plastic-covered collectors for drying oyster mushrooms. The experiment ran over two days, for a total drying time of 16 hours. The observed parameters included collector temperature, solar radiation intensity, moisture content, drying rate, collector efficiency, and dryer efficiency. The results showed that the average collector temperature reached 42.7°C, while the overall average solar radiation intensity was 351.6 W/m². The average radiation intensities received by the right and left collectors were 392.2 and 311.1 W/m², respectively. Drum 1 achieved the lowest final moisture content (5.00%), while Drum 3 reached 5.20%. Collector and dryer efficiencies were 74.92% and 12.55%, respectively. The system shows potential as an effective, environmentally friendly technology for drying oyster mushrooms.
Co-Authors Agnes Br. Manurung Agus Purwanto Anita Maya Suteja Anna Ingani Widjajaseputra Azor Yulianus Tefa Christian Liguori Farhan Habib Febrya Christin Handayani Buan Hadi Santoso Laurentinus Indah Epriliati Jandri Fan H.T. Saragi Laurensia Maria Yulian Dwiputranti Darmoatmodjo Leo Eladisa Ganjari Maria Olivia Halim Melvin Emil Simanjuntak - Misail Epainetus Silla Monika Prahartiwi Muhammad Iqbal Murti Poppy Finike Epifana Tumbol Pricilia Monica Prisca Caesa Moneteringtyas Ristiarini, Susana Sipayung, Boanerges Putra Tarsisius Dwi Wibawa Budianta Thomas Indarto Putut Suseno Werdani, Yesiana Dwi Wahyu Widyastuti, Theresia Endang Widoeri Wilda Lumban Tobing William Saputrajaya