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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Media Informatika
sena maulana
Institut Teknologi Sumatera
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences

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Karakteristik Biobriket Arang Campuran Limbah Batang Singkong dan Kayu Kaliandra pada Berbagai Variasi Komposisi Rio Ardiansyah Murda; Maeda Wahyuningrum; Rima Adzra Zahra; Sena Maulana
Jurnal Media Informatika Vol. 6 No. 3 (2025): Jurnal Media Informatika
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jumin.v6i3.6583

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik biobriket arang dari campuran limbah batang singkong dan kayu kaliandra pada variasi komposisi 0:100, 25:75, 50:50, 75:25, dan 100:0 (% berat). Pembuatan biobriket dilakukan melalui proses pengeringan, pengarangan, pengayakan ukuran 40–60 mesh, pencampuran dengan 5% perekat tepung kanji, pencetakan menggunakan kempa hidrolik, dan pengeringan. Karakterisasi dilakukan terhadap kerapatan, kadar air, kadar abu, kadar zat terbang, karbon terikat, nilai kalor, dan laju pembakaran. Hasil pengujian menunjukkan bahwa pencampuran limbah batang singkong dan kayu kaliandra mampu memperbaiki mutu biobriket. Komposisi S50K50 memberikan hasil terbaik dengan nilai kerapatan 0,40 g/cm³, kadar air 3,65%, kadar abu 7,71%, zat terbang 26,27%, karbon terikat 66,01%, nilai kalor 7164 kal/g, dan laju pembakaran 0,09 g/menit. Seluruh komposisi memenuhi standar SNI 01-6235-2000 dan EN 1860-2-2005, namun hanya beberapa komposisi yang sesuai dengan standar GOST 7657-84. Nilai zat terbang masih relatif tinggi sehingga belum memenuhi batas standar SNI, tetapi secara keseluruhan campuran ini menunjukkan potensi tinggi sebagai bahan bakar biomassa alternatif berbasis limbah pertanian.
Effects of Steam Pretreatment and Delignification Time on Balsa Wood Polyvinyl Alcohol Composites Sena Maulana; Fajar Aditya Julyatmojo; David Raja Endar Ambarita; Laras Widi Setia Ningrum; Jabosar Hamonangan Panjaitan; Muhammad Iqbal Maulana; Sarah Augustina; Muhammad Aizat Abdul Ghani
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 2 (2026): July 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v0i0.%p

Abstract

The effect of controlled steam pretreatment on polyvinyl alcohol/balsa wood composites was investigated. Controlled steam was applied prior to subsequent sodium chlorite-acetic acid delignification of balsa wood and its impregnation with polyvinyl acetate (PVA). Low-density balsa veneers were either not subjected to steam or were steamed at 126 °C for 1 h. Wood delignification was carried out in a 1% solution of sodium chlorite-acetic acid at 80 °C for 45, 90, or 180 min. The samples were further bleached in a 3% hydrogen peroxide solution and vacuum-impregnated with 5% PVA. The Wood-PVA system was monitored using color, tensile, FTIR, and X-ray diffraction analyses. The steam-pretreated and delignified for 90 min sample (90S) exhibited the best characteristics, showing a tensile strength of 3.39 MPa and Young’s modulus of 112.36 MPa. The obtained data indicated continuous removal of lignin and hemicellulose, much stronger PVA-cellulose interactions, and preservation of cellulose in its native cellulose I state without a significant decrease in crystallinity. The proposed treatment represents a reproducible way to convert balsa wood into a stiff, formaldehyde-free, and low-density composite material available for implementation in modern building technologies.
Co-Authors David Raja Endar Ambarita Fajar Aditya Julyatmojo Jabosar Hamonangan Panjaitan Laras Widi Setia Ningrum Maeda Wahyuningrum Muhammad Aizat Abdul Ghani Muhammad Iqbal Maulana Rima Adzra Zahra Rio Ardiansyah Murda Sarah Augustina