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Atmawi Darwis
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Agriculture, Biological Sciences & Forestry Arts Humanities Education Social Sciences Other

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Analisis Layer System Bambu Laminasi Berdasarkan Penyebaran Kerapatan Ikatan Pembuluhnya Effendi Tri Bahtiar; Naresworo Nugroho; Surjono Surjokusumo; Lina Karlinasari; Atmawi Darwis
Jurnal Ilmu Pertanian Indonesia Vol. 18 No. 1 (2013): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1654.066 KB)

Abstract

Anatomically, bamboo is constructed from many types of cells. Vascular bundles are the cells which give the highest contribution to the bamboo strength, thus the density distribution of vascular bundles could be used as the main variable for analyzing the layer system of bamboo strip and laminated bamboo. The density of vascular bundles distribution decreases gradually from the outer to inner part in a regular manner which could be fitted by linear or nonlinear function. Ratio of modulus of elasticity (E) which widely used in transformed cross section (TCC) method for analyzing the layer system are substituted by ratio of density distribution of vascular bundles with asumption that both are highly correlated. The data in this study proved that there are high Pearson’s corellation between the theoretical and the empirical result, and the paired t-student test also showed both are not significantly different; thus, this new method could be applied in very good result. There are 3 models applied in this study, namely linear, logarithm, and power. Power model is the best among others since its theoretical gives the nearest estimation to the empirical measurement.
Community-Based Pyrolysis Training and Technology Transfer for Sustainable Biomass Utilization in Metut Village Anne Hadiyane; Alfi Rumidatul; Anca Awal Sembada; Hadimanah Fikrudien Bahtiar; Atmawi Darwis; Mustika Dewi; Imra Imra
Room of Civil Society Development Vol. 5 No. 3 (2026): Room of Civil Society Development
Publisher : Lembaga Riset dan Inovasi Masyarakat Madani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59110/rcsd.959

Abstract

Metut Village, Mentarang Hulu District, Malinau Regency, North Kalimantan, possesses abundant woody biomass residues that remain largely underutilized despite their potential economic and environmental value. Simultaneously, local communities face challenges related to low soil fertility and limited success in agarwood (Aquilaria spp.) seed germination. This community service program aimed to introduce pyrolysis technology for converting woody biomass into biochar and liquid smoke while strengthening local capacity through training and technology transfer. By converting biomass residues that were previously left unmanaged or openly burned into valuable products, the program directly contributes to more sustainable biomass waste management at the village level. The three-day program involved 25 participants, including farmers, agarwood cultivators, village officials, women engaged in agriculture, and village youth. Activities comprised educational workshops, practical demonstrations, hands-on training, and the donation of a portable pyrolysis unit. Program effectiveness was evaluated through pre-test and post-test assessments and observation of participants’ practical performance. Results demonstrated a significant increase in knowledge, with average scores rising from 34.2% before training to 82.7% after training, reflecting a marked enhancement in community capacity to independently manage biomass resources.  All participants successfully operated the pyrolysis unit during practical sessions. A demonstration run using 12 kg of dry woody branches yielded approximately 3.2 kg of biochar and 2.1 L of liquid smoke, both promising for improving soil fertility and supporting agarwood cultivation. The donated equipment and operational manual provide a practical, replicable foundation for continued community-led biochar and liquid smoke production, supporting the long-term sustainability of biomass utilization and value-added agricultural applications.
Community-Based Pyrolysis Training and Technology Transfer for Sustainable Biomass Utilization in Metut Village Anne Hadiyane; Alfi Rumidatul; Anca Awal Sembada; Hadimanah Fikrudien Bahtiar; Atmawi Darwis; Mustika Dewi; Imra Imra
Room of Civil Society Development Vol. 5 No. 3 (2026): Room of Civil Society Development
Publisher : Lembaga Riset dan Inovasi Masyarakat Madani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59110/rcsd.959

Abstract

Metut Village, Mentarang Hulu District, Malinau Regency, North Kalimantan, possesses abundant woody biomass residues that remain largely underutilized despite their potential economic and environmental value. Simultaneously, local communities face challenges related to low soil fertility and limited success in agarwood (Aquilaria spp.) seed germination. This community service program aimed to introduce pyrolysis technology for converting woody biomass into biochar and liquid smoke while strengthening local capacity through training and technology transfer. By converting biomass residues that were previously left unmanaged or openly burned into valuable products, the program directly contributes to more sustainable biomass waste management at the village level. The three-day program involved 25 participants, including farmers, agarwood cultivators, village officials, women engaged in agriculture, and village youth. Activities comprised educational workshops, practical demonstrations, hands-on training, and the donation of a portable pyrolysis unit. Program effectiveness was evaluated through pre-test and post-test assessments and observation of participants’ practical performance. Results demonstrated a significant increase in knowledge, with average scores rising from 34.2% before training to 82.7% after training, reflecting a marked enhancement in community capacity to independently manage biomass resources.  All participants successfully operated the pyrolysis unit during practical sessions. A demonstration run using 12 kg of dry woody branches yielded approximately 3.2 kg of biochar and 2.1 L of liquid smoke, both promising for improving soil fertility and supporting agarwood cultivation. The donated equipment and operational manual provide a practical, replicable foundation for continued community-led biochar and liquid smoke production, supporting the long-term sustainability of biomass utilization and value-added agricultural applications.
Co-Authors Anca Awal Sembada Effendi Tri Bahtiar Hadimanah Fikrudien Bahtiar Hadiyane, Anne imra imra Lina Karlinasari Mustika Dewi Naresworo Nugroho Rumidatul, Alfi Surjono Surjokusumo