Article Per Year (5 Year)
p-Index From 2020 - 2025
0.947
P-Index
This Author published in this journals
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 Kaharati
Nyahu Rumbang
Faculty of Agriculture, Gadjah Mada University
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Physics Public Health Social Sciences Other

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
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.
Respon Tanaman Kedelai Edamame (Glycine Max (L.) Merr.) Terhadap Pemberian Dolomit Dan Pupuk Hayati Majemuk Pada Tanah Gambut Riak Asie, Erina; Rumbang, Nyahu; Rizal, Muhammad; Kresnatita, Susi
Jurnal Penelitian UPR Vol. 4 No. 2 (2024): Jurnal Penelitian UPR: Kaharati
Publisher : LPPM Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52850/jptupr.v4i2.15662

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. Extensification is one effort that can be done to increase edamame soybean production. One type of soil that has the potential to expand edamame soybean plants is peat soil. This research aims to examine the response of edamame soybean plants to the application of dolomite and compound biofertilizer 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, 15, 30, and 45 g polybag-1) and the second factor, namely biological fertilizer (0, 5, 10, and 15 g kg-1 seed). The results of the study showed that the influence of the interaction between dolomite and compound biofertilizer as well as the single factor of compound biofertilizer had no significant effect on the growth and yield of edamame soybeans. Edamame soybean plants are responsive to dolomite. The highest number of plant seeds was obtained when administering dolomite at a dose of 30 or 45 g polybag-1, namely 29.50-32.25 seeds plant-1.  
Perubahan Sifat Kimia Gambut Pedalaman Akibat Pemberian Dolomit dan Pupuk Majemuk Hayati dan Hasil Tanaman Kedelai Edamame (Glycine max (L.) Merrill) Rumbang, Nyahu; Riak Asie, Erina; Simbolon, Jonas
Daun: Jurnal Ilmiah Pertanian dan Kehutanan Vol. 12 No. 1 (2025): 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.v12i1.9707

Abstract

The purpose of this study was to study the effect of dolomite and compound biofertilizer on changes in the chemical properties of peat and edamame plant yields on inland peat. Using a Factorial Completely Randomized Design with 2 factors. The first factor is dolomite lime with 4 levels, namely D0 = 0 t ha-1, D1 = 5 t ha-1, D2 = 10 t ha-1, D3 = 15 t ha-1 and the second factor is compound biofertilizer with 4 levels, namely H0 = 0 g.kg-1 seed, H1 = 5 g.kg-1 seed, H2 = 10 g.kg-1 seed, H3 = 15 g.kg-1 seed. The results of the study showed that increasing the dose of dolomite to 15 t ha-1 together with the provision of biofertilizer at a dose of 10 or 15 g.kg-1 of seed was able to provide the highest pH value, namely 4.06 - 4.18. In the parameter of peat total N value, only dolomite treatment gave a significant difference. The highest average Ca-dd value was obtained by addition 15 t ha-1 of dolomite together with biofertilizer  at a dose of 15 g.kg-1 of seed, which was 14.897 (gmol(+)/kg). The highest Mg-dd value was obtained by addition 15 t ha-1 of dolomite together with biofertilizer  at a dose of 15 g.kg-1 of seed, which was 36.680 (gmol(+)/kg). The highest number of pods (25.00 pods) and the highest pod weight (11.12 g) were obtained by addition 10 t ha-1 of dolomite. The highest number of pods occurred by biofertilizer at 15 g.kg-1 of seed (21.70 pods).
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.
Co-Authors Chotimah, Hastin E.N.C. Erina Riak Asie Erlinda Yurisinthae Gde Suastika, Komang Karelius, Karelius Made Dirgantara MUHAMMAD RIZAL Nurmayulis Oemar, Oesin Riak Asie, Erika Riak Asie, Erina Safitri, Wanda Saputra, Marcelino A. Simbolon, Jonas Surawijaya, Panji Susi Kresnatita Untung Darung Vetrani Asie, Kambang