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All Journal Journal of Degraded and Mining Lands Management JPSE (Journal of Physical Science and Engineering) AGRIPEAT 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 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.
RESPON PERTUMBUHAN DAN HASIL KEDELAI (Glycine max (L) Merril GALUR GH-63 YANG DIBERI PUPUK HAYATI PADA GAMBUT PEDALAMAN: GROWTH AND YIELD RESPONSE OF SOYBEAN (Glycine max (L) Merril GH-63 STRAINS GIVEN BIOLOGICAL FERTILIZER ON INLAND PEAT Rumbang, Nyahu; Oemar, Oesin; Vetrani Asie, Kambang; Darung, Untung; Riak Asie, Erika; Surawijaya, Panji; Safitri, Wanda
AgriPeat Vol. 26 No. 02 (2025): JURNAL AGRIPEAT Vol. 26 No. 02 September 2025
Publisher : Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/agp.v26i02.19735

Abstract

The purpose of this study was to study the effect of organic fertilizer on the growth and yield of GH-63 soybeans on inland peat. The peat used was taken from Kalampangan Village and the land conditions had never been used for agricultural cultivation. The study was conducted in the Peat Techno Park area of ​​Palangka Raya University. Using a Completely Randomized Design, with 4 treatments of Rhizoka compound organic fertilizer dosage, namely H0 = 0 g.kg seed-1, H1 = 10 g.kg seed-1, H2 = 20 g.kg seed-1, H3 = 30 g.kg seed-1. Each treatment was repeated 5 times and because there were destructive and non destructive observations, the study was conducted in 2 (two) equal series. Data were analyzed by analysis of variance at the 5% and 1% levels. If the results of the analysis of variance indicate a significant effect, it is continued with the BNJ test at the 5% level. The results showed that treatment H3 = 30 g.kg seed-1 as the best treatment in all parameters, namely leaf area (77.03 cm2), effective root nodule weight (1.015 g), root dry weight (1.04 g), loss dry weight (3.71 g), root extinction ratio (3.64 g), number of seeds (1.98 seeds) and seed weight (1.15 g) compared H0 = 0 g.kg seed-1. The dose dose of biofertilizer is 30 g.kg seed-1 as the best dose for the growth and yield of GH-63 soybean plants on inland peat.
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
Co-Authors Arief Rahman Chotimah, Hastin E.N.C. Darmawan Darmawan Erina Riak Asie Erlinda Yurisinthae Gde Suastika, Komang KAMBANG VETRANI ASIE, KAMBANG VETRANI Karelius, Karelius Made Dirgantara MUHAMMAD RIZAL Nurmayulis Oemar, Oesin Riak Asie, Erika Riak Asie, Erina Safitri, Wanda Saputra, Marcelino A. Simbolon, Jonas Suparno Surawijaya, Panji Susi Kresnatita Syahrudin Syahrudin, Syahrudin Tinting S, Ruben Untung Darung Vetrani Asie, Kambang Widyawati, Wahyu Winerungan, Shella Agnessy Jullyta