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All Journal Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Penelitian Kelapa Sawit Jurnal Teknologi Lingkungan Journal of Engineering Science and Technology Management
Chandra Gunawan
Universitas Andalas
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Social Sciences Other

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Produksi dan karakterisasi selulosa mikrokristalin dari limbah batang kelapa sawit (Elaeis Guineensis Jacq.) hasil replanting perkebunan Chandra Gunawan; Alfi Asben; Tuty Anggraini; Athanasia Amanda Septevani
Jurnal Penelitian Kelapa Sawit Vol 29 No 3 (2021): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v29i3.139

Abstract

Selulosa mikrokristalin merupakan turunan dari selulosa atau selulosa yang dimodifikasi dalam skala mikro dengan ukuran panjang sekitar 10-200 µm yang bersifat kristalin. Batang kelapa sawit dapat digunakan sebagai salah satu alternatif produksi selulosa mikrokristalin. Penelitian ini bertujuan untuk mendapatkan selulosa mikrokristalin dari batang kelapa sawit dan mengetahui karakteristik setiap tahapan perlakuannya. Diperoleh selulosa mikrokristalin dengan kandungan selulosa yang berhasil ditingkatkan dari 31,11 ± 2,01% menjadi 84,35 ± 1,04%, hal ini sesuai dengan gugus puncak serapan FTIR dan seiring dengan penurunan kandungan lignin dan hemiselulosa. Analisa XRD menunjukkan terjadinya peningkatan kristalinitas dari MCC hingga 78% setelah melalui tahapan perlakuan kimia. Hasil SEM didapatkan MCC dengan panjang dan lebar sebesar 43,2 ± 19,6 µm dan 11,4 ± 8,1 µm dan menunjukkan terjadinya pemecahan komponen kompleks pada serat Raw batang kelapa sawit yang digambarkan dengan struktur dari permukaan yang menjadi lebih halus dan berbentuk fibril yang teratur. Berdasarkan hasil penelitian ini, proses delignifikasi, pemutihan, dan hidrolisis asam secara bertahap berhasil memproduksi selulosa mikrokristalin dari batang kelapa sawit.
Improving Hydrophobicity and Oil Barrier Performance of Paper by Coating with PVA/Nanocellulose-Based Suspension Tanjung, Faisal Amri; Arifin, Yalun; Gunawan, Chandra; Fung, Liem Khe
Jurnal Teknologi Lingkungan Vol. 25 No. 2 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2024.5775

Abstract

This study investigates the use of nanocellulose and polyvinyl alcohol (PVA) suspension as a coating formulation on a paper substrate and its effects on the paper’s oil and water barrier properties. The PVA/nanocellulose coating suspension was prepared via a simple nanocellulose mixing procedure with various concentrations of PVA. The coating was carried out by depositing an adhesive agent and multiple layers of nanocellulose/PVA suspension on the paper surface using a bar coater. The results showed that coating up to the fourth layer decreased the opacity index and air permeability rate of the coated papers, but there was a slight increase in the air permeability at the sixth layer. The deposition of PVA/nanocellulose suspension on the paper surface also increased the water and oil barrier performance. The highest contact angle (CA) of 82° and oil kit value of 14 was obtained at the fourth layer of coating using suspension with 2 wt% of PVA content, as compared to the uncoated paper (CA 43°). It is interesting to note that coating paper using nanocellulose/PVA suspension can effectively enhance the hydrophobicity and oil barrier performances of the paper. This satisfactory results in paper properties after being coated with nanocellulose/PVA suspension can be a potential environmentally friendly material in food packaging applications.
Effect of Boiling, Steaming, and Autoclaving Methods on the Physical Characteristics of Moringa (Moringa oleifera) Seed Flour Salman, Annisa Nazifa; Gunawan, Chandra; Ristia, Jeany; Panjaitan, Bintang Sipartogi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 5 No. 1 (2025): Maret 2025
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v5i1.268

Abstract

This study evaluated the effect of moist heat processing (boiling, steaming, autoclaving) on the physical properties of Moringa oleifera seed flour to determine the optimal pretreatment for product development. Exotesta of moringa seeds were removed, subjected to the treatments, oven-dried, grounded, and sieved (60 mesh). Moisture content, color (CIELab), bulk density, and angle of repose were analyzed. Results showed that all treatments increased moisture content compared to raw seeds (4,36–4,46%), with no significant difference among treatments. Autoclaving produced flour with the highest bulk density (0,4258 g/cm³) and lowest angle of repose (33,37°), indicating better flowability. Color analysis revealed darker flour in autoclaved and boiled samples due to Maillard reactions. Overall, autoclaving is the most effective pretreatment for producing denser, free-flowing Moringa seed flour suitable for functional food applications.
Paper Mill Sludge as a Substitute Material in Paving Blocks for a Sustainable Waste Management Approach Gunawan, Chandra; Fung, Liem Khe; Nul Hakim, Lukman; Wahyudi, Eko; Pramana, Angga; Zalfiatri, Yelmira
Journal of Engineering Science and Technology Management (JES-TM) Vol. 5 No. 2 (2025): September 2025
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v5i2.269

Abstract

This study evaluates the use of Paper Mill Sludge (PMS) waste as a partial replacement for fine aggregate in paving block production, focusing on compressive strength and economic feasibility. PMS was incorporated at 0%, 5%, 10%, 15%, and 20% of the total fine aggregate weight. Compressive strength tests followed the Indonesian National Standard (SNI 03-0691-1996), accompanied by production cost analysis. The results showed that 5% PMS achieved the highest compressive strength of 264.23 kg/cm², about 7.7% higher than the control 258.71 kg/cm², meeting the SNI quality class B (K200) standard. Meanwhile, 10% PMS reduced production costs by 6–8% while still satisfying the minimum requirement for K200 paving blocks (category B). This demonstrates a clear trade-off between mechanical performance and cost efficiency, where 5% PMS ensures maximum strength, while 10% PMS provides adequate strength with economic benefits. At lower levels, PMS fibers improved cement–aggregate bonding and reduced voids, whereas higher dosages (>10%) disrupted hydration and lowered strength. Practically, PMS utilization offers the paving block industry a sustainable and cost-effective alternative that reduces reliance on natural aggregates, supports waste valorization, and aligns with SNI standards for applications such as parking lots.
Capacity Building Training for Administrators to Improve the Management of Harapan Makmur Village-Owned Enterprise in Tebing Tinggi Village: Pelatihan Peningkatan Kapasitas Pengurus dalam Rangka Meningkatkan Pengelolaan BUMDES Harapan Makmur Desa Tebing Tinggi Anthony Hamzah; Angga Pramana; Eko Wahyudi; Rahmadini Payla Juarsa; Jeany Ristia; Chandra Gunawan; Nur Hasnah; Vivin Jenika Putri; Anania Rahmah; Arum Rovarti Ningsih; Nadya Novianti Dwi Putri; Addiena Syahvina Nasution; Masyitah; Fikratul Ikhsan; Fadlila Endyra
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 9 No. 5 (2025): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/

Abstract

BUMDes Harapan Makmur was established with the aim of developing the village's economic potential through business units based on local resources, including the management of agricultural tools, trade in agricultural products, and equipment and transportation rental services. The businesses run by BUMDes have not yet been operating optimally. This is due to a lack of competent human resources, a lack of external support, and limited access to training and outreach at BUMDes Harapan Makmur. This community service program aims to identify strategic steps to increase the capacity of BUMDes management for suntainability. The methods used in the preparation stage included surveys and Focus Group Discussions (FGDs), while the implementation and evaluation stages followed. The training results indicated that BUMDes Harapan Makmur has several potential business units that can be developed, namely the Rice Milling Unit (RMU), a 5-hectare oil palm plantation, agriculture and livestock businesses, oil palm plantations (5 ha) and rice fields (70 ha), provision of agricultural production facilities (saprodi), agricultural services (RMU, rice field plowing), and travel services. Implications in increasing the capacity of administrators through capacity building training for administrators, optimization of agricultural tools and agricultural inputs, socialization and community empowerment
Co-Authors Addiena Syahvina Nasution Alfi Asben Anania Rahmah Angga Pramana Angga Pramana, Angga Anthony Hamzah Arifin, Yalun Arum Rovarti Ningsih Athanasia Amanda Septevani Eko Wahyudi EKO WAHYUDI Fadlila Endyra Faisal Amri Tanjung Fikratul Ikhsan Fung, Liem Khe Jeany Ristia Masyitah Nadya Novianti Dwi Putri Nul Hakim, Lukman Nur Hasnah Panjaitan, Bintang Sipartogi Rahmadini Payla Juarsa Ristia, Jeany Salman, Annisa Nazifa Tuty Anggraini Vivin Jenika Putri Yelmira Zalfiatri