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All Journal Journal of Degraded and Mining Lands Management JPSE (Journal of Physical Science and Engineering) JMM (Jurnal Masyarakat Mandiri) Daun: Jurnal Ilmiah Pertanian dan Kehutanan Risalah Fisika Jurnal Pengabdian kepada Masyarakat Nusantara
Nyahu Rumbang
Faculty of Agriculture, Gadjah Mada University
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Materials Science & Nanotechnology Physics Social Sciences Other

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Proses Torefaksi Untuk Meningkatkan Nilai Kalor Cangkang Sawit dengan Metode COMB Gde Suastika, Komang; Karelius, Karelius; Dirgantara, Made; Rumbang, Nyahu
Risalah Fisika Vol 3, No 2 (2019): Risalah Fisika ISSN 2548-9011
Publisher : Physical Society of Indonesia (PSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13.3 KB) | DOI: 10.35895/rf.v3i2.159

Abstract

Abstrak – Indonesia merupakan negara produsen dan eksportir kelapa sawit terbesar di dunia, yang menghasilkan limbah biomassa yang melimpah. Pemanfaatan limbah hasil industri kelapa sawit menjadi bahan bakar dengan modifikasi termokimia dapat menjadi salah satu solusi untuk membuat nilai tambah dari limbah tersebut. Berdasarkan tinjauan dan penelitian terdahulu, cangkang kelapa sawit merupakan bahan baku yang baik untuk dimanfaatkan sebagai bahan bakar berbasis biomassa. Pada penelitian ini dilakukan proses torefaksi cangkang sawit dengan ukuran lolos ayakan 0,5 cm kemudian diuji nilai kalor sebelum dan setelah torefaksi. Torefaksi cangkang sawit dengan menggunakan metode COMB (Counter Flow Multi-Buffle) pada suhu 250 °C dan flowrate 4 cm3/menit meningkatkan nilai kalor sebesar 824,43 cal/g dengan nilai sebelum dan setelah torefaksi sebesar 4018,78 cal/g dan 4843,21 cal/g. Dibandingkan dengan metode batch pada penelitian sebelumnya nilai kalori yang dihasilkan tidak berbeda jauh. Keunggulan metode COMB adalah waktu prosesnya yang singkat yakni sebesar 5 menit, sedangkan metode batch memerlukan waktu 15-60 menit, sehingga kebutuhan energi untuk prosesnya lebih besar. Kata kunci: bahan bakar, cangkang sawit, counter flow multi-buffle, nilai kalori, torefaksi
Significance of Torrefaction Effect on Energy Properties Palm Kernel Shell Dirgantara, Made; Karelius, Karelius; Rumbang, Nyahu
JPSE (Journal of Physical Science and Engineering) Vol 8, No 2 (2023): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um024v8i22023p118

Abstract

The process of torrefaction is a thermochemical process that is widely used for the conversion of biomass into renewable fuels. In this study, the significance of temperature was determined by carrying out the torrefaction process at temperatures ranging from 275 to 350 degrees Celsius with a fixed residence time of 60 minutes. To ascertain the impact of time on the process, the torrefaction procedure was conducted over a residence time of 20 to 60 minutes at 300°C. Increasing the torrefaction temperature can substantially increase the palm kernel shell's calorific value, decrease water content, decrease volatility, increase fixed carbon, especially from 275 oC to 325 oC, and decrease ash content from 275 oC to 300 oC. Increasing the torrefaction residence time can significantly increase the palm kernel shell's calorific value from 20-40 minutes, decrease ash content and volatile content, and increase fixed carbon from 20-30 minutes. The residence time did not affect the water content in torrefaction temperature at 300 oC. The statistical analysis revealed that temperature and residence time have a substantial impact on the heating value and proximate analysis.
Improvement in chemical properties of degraded peatlands, physiological characteristics, and soybean yield using dolomite Asie, Erina Riak; Rumbang, Nyahu; Chotimah, Hastin E.N.C.; Darung, Untung; Saputra, Marcelino A.; Yurisinthae, Erlinda; Nurmayulis, Nurmayulis
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8235

Abstract

Degraded peatlands are natural resources that must be managed properly. The unique characteristics of degraded peatlands, such as high acidity and low availability of macro and micronutrients, are the main challenges in soybean cultivation. The pot experiment was conducted using a completely randomized design consisting of four dolomite dosage levels, namely 0, 3, 6, and 9 t/ha, with five replications. The research objective was to assess the effect of dolomite application on the chemical properties of degraded peatland, physiological characteristics, and soybean yield. The results showed that dolomite application significantly improved the chemical properties of degraded peatlands and increased the physiological characteristics and yield of soybeans. Dolomite at a dose of 6 or 9 t/ha achieved the highest pH, exchangeable Ca, and exchangeable Mg after incubation and after harvest. The highest total chlorophyll and average net assimilation rate were obtained at 9 t/ha dolomite application of 3.95 mg/g and 0.048 g/cm2/day, respectively. The relationship between dolomite and the total chlorophyll content of soybean plants was very strong (r = 0.94) with the equation y = 0.35 + 0.37x. The highest soybean seed weight was observed when dolomite was applied at a dose of 9 t/ha, resulting in 9.72 g/plant, an increase of 219.70% compared to the control. These findings suggest that optimal dolomite application can enhance the fertility of degraded peatlands and improve soybean productivity while supporting the sustainable management and rehabilitation of these ecosystems.
Pembinaan Pemanfaatan Pekarangan Untuk Meningkatkan Ketahanan Pangan di Desa Mampari Kecamatan Batu Mandi Kabupaten Balangan Suparno; Tinting S, Ruben; Widyawati, Wahyu; Winerungan, Shella Agnessy Jullyta; Rumbang, Nyahu; Rahman, Arief
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 5 No. 4 (2024): Jurnal Pengabdian kepada Masyarakat Nusantara (JPkMN) Edisi September - Desembe
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v5i4.4489

Abstract

In order to enhance the knowledge and abilities of rural farmers and to bolster food security, community service initiatives have been undertaken. This community service activity was conducted on the grounds that farmers in Mampari village, Batumandi subdistrict, frequently encounter challenges in meeting their vegetable consumption needs despite the availability of land in their yards that could be utilized directly. This has a negative impact that is not desired, such as a lack of vitamin and mineral intake and food fiber, a lack of benefits of vegetable consumption, and also due to the ignorance of farmers in efforts to utilize yard land by cultivating horticultural crops and processing plant products. The community service activity was conducted using three methods: lecture, written, and demonstration. The results of the service demonstrate a notable increase in knowledge and skills related to horticultural plant cultivation and management, processing techniques, and business opportunities. Specifically, there was an 85% improvement in understanding horticultural plant cultivation and management, a 90% increase in processing skills, a 75% rise in independence in processing and presenting horticultural products, and an 85% enhancement in understanding the potential economic value of horticultural plants. These outcomes highlight the effectiveness of the community service activities in enhancing the knowledge and skills of rural farmers, which in turn can contribute to improved food security.
Pertumbuhan dan Hasil Kedelai Edamame (Glycine max (L.) Merr.) pada Tanah Gambut yang diberi Dolomit dan Pupuk Hayati: Growth and Yield of Edamame Soybeans (Glycine max (L.) Merr.) on Peat Soils Supplied with Dolomite and Biofertilizer Asie, Erina Riak; Rumbang, Nyahu; Asie, Kambang Vetrani; Syahrudin, Syahrudin; Darmawan, Darmawan
Daun: Jurnal Ilmiah Pertanian dan Kehutanan Vol. 11 No. 1 (2024): Daun: Jurnal Ilmiah Pertanian dan Kehutanan
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/daun.v11i1.6284

Abstract

Edamame soybeans are soybeans that are harvested young so they are known as green soybeans. The high nutritional content and delicious taste make edamame soybeans popular with the public, so they have the potential to be developed. One effort to increase edamame production is through expanding the planting area (Extensification). One type of soil that has the potential for expanding edamame soybean plants is peat soil. This research aims to examine the effect of dolomite and biofertilizer on the growth and yield of edamame on peat soil. The experiment was carried out using a two-factor factorial Completely Randomized Design (CRD) with three replications. The first factor, namely dolomite (0, 5, 10, 15 t ha-1) and the second factor, namely biofertilizer (0, 5, 10, 15 g kg-1 seed). The research results showed that the interaction between dolomite and biofertilizer and the single factor of biofertilizer had no significant effect on the growth and yield of edamame soybeans. Theresults showed that the interaction between dolomite and biofertilizer and the single factor of biofertilizer had no significant effect on the growth and yield of edamame soybeans. The application of dolomite can increase leaf area, plant dry weight, number of pods, and fresh pod weight plant-1 of edamame soybean plants on peat soil. Keywords: extensification, edamame, dolomite, biofertilizer, peat soil
PELATIHAN PENGOLAHAN LIMBAH SAYUR DAN BUAH SEBAGAI PAKAN FERMENTASI SAPI DI KELOMPOK PETERNAK NGUDI MAKMUR KELURAHAN KALAMPANGAN KOTA PALANGKA RAYA Rumbang, Nyahu; Noorrahman, Nabil Fariz; Sandriya, Ardi; Paulini, Paulini
JMM (Jurnal Masyarakat Mandiri) Vol 10, No 1 (2026): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v10i1.36910

Abstract

Abstrak: Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan efisiensi nutrisi pakan sapi melalui pemanfaatan limbah sayuran dan buah-buahan menjadi pakan fermentasi yang ekonomis dan ramah lingkungan. Kegiatan dilaksanakan bersama Kelompok Peternak Ngudi Makmur, yaitu kelompok peternak sapi potong rakyat dengan anggota aktif sebanyak 20 orang yang memelihara 3–10 ekor sapi per peternak di Kelurahan Kalampangan, Kota Palangka Raya. Metode yang digunakan meliputi sosialisasi, pelatihan, demonstrasi pembuatan pakan fermentasi, pendampingan teknis, dan evaluasi pengetahuan serta minat peternak melalui pretest dan posttest. Hasil kegiatan menunjukkan peningkatan signifikan pada tingkat pengetahuan peternak sebesar rata-rata 69,5% dan peningkatan minat sebesar 75%. Penerapan pakan fermentasi juga terbukti meningkatkan efisiensi nutrisi dan menekan biaya pakan hingga 35%. Kegiatan ini memberi dampak positif terhadap aspek ekonomi, sosial, dan lingkungan melalui pemanfaatan limbah organik lokal secara produktif.Abstract: This community service program aimed to improve the nutritional efficiency of cattle feed by utilizing vegetable and fruit waste as economical and environmentally friendly fermented feed. The activity was conducted in collaboration with the Ngudi Makmur Farmers Group, a smallholder beef cattle group with 20 active members, each raising 3–10 heads of cattle in Kalampangan Subdistrict, Palangka Raya City. The methods used included outreach, training, demonstrations of fermented feed production, technical assistance, and evaluation of farmers’ knowledge and interest through pretest and posttest questionnaires. The results showed a significant increase in farmers’ knowledge, with an average improvement of 69.5%, and a 75% increase in their interest. The application of fermented feed also proved to enhance nutrient efficiency and reduce feed costs by up to 35%. This program generated positive economic, social, and environmental impacts through the productive utilization of locally available organic waste.
Co-Authors Ardi Sandriya Arief Rahman Darmawan Darmawan Erina Riak Asie Erlinda Yurisinthae Gde Suastika, Komang Hastin Ernawati Nur Chusnul Chotimah KAMBANG VETRANI ASIE, KAMBANG VETRANI Karelius, Karelius Made Dirgantara MUHAMMAD RIZAL Nabil Fariz Noorrahman Nurmayulis Paulini . Riak Asie, Erina Saputra, Marcelino A. Simbolon, Jonas Suparno Susi Kresnatita Syahrudin Syahrudin, Syahrudin Tinting S, Ruben Untung Darung Widyawati, Wahyu Winerungan, Shella Agnessy Jullyta