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Department of Agricultural and Biological Engineering, Faculty of Agriculture Lampung University Jl. Soemantri Brojonegoro No. 1, Kedaton, Bandar Lampung, Lampung. 35145
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Jurnal Agricultural Biosystem Engineering
Published by Universitas Lampung
ISSN : -     EISSN : 28304403     DOI : -
Core Subject : Science, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology
This journal focuses on agriculture, biosystems and agricultural techniques. Covering power and agricultural machinery, agricultural cultivation, renewable energy, bioprocessing of agricultural products, environmental civil engineering, agricultural irrigation, robotics, automatic control in agriculture, design of agricultural machinery and tools, ergonomics in agriculture, and nanotechnology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 193 Documents
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Unjuk Kerja Mesin Perajang Biomassa Tipe Slicer Untuk Merajang Batang Singkong Saputra, Rio Dwi; Asmara, Sandi; Tusi, Ahmad; Suharyatun, Siti
Jurnal Agricultural Biosystem Engineering Vol. 4 No. 3 (2025): September 2025
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to evaluate the performance of the Rabakong slicer-type machine and compare it with previous models. A Completely Randomized Design (CRD) was used with two factors: machine rotation speed (1500, 2000, and 2700 RPM) and the number of cassava stems input (2, 3, and 4 stems). Each treatment was repeated three times for 10 minutes. Observed parameters included work capacity (kg/h), fuel consumption (l/h), percentage of product loss, slicing uniformity (%), and ergonomic aspects of operator performance. The results showed the highest work capacity of 522.2 kg/h at 2700 RPM with 4 stems. The lowest product loss (0.82%) occurred at 2000 RPM with 3 stems, while the lowest fuel consumption (0,680 l/h) was recorded at 1500 RPM with 4 stems. The highest slicing uniformity (58%) was obtained at 2700 RPM, particularly for output passing through a 0.1 mm mesh. The Rabakong slicer-type machine falls under the moderate workload category with a CVL of 41–47% and an operator heart rate of 125–135 bpm, still within safe limits (Tarwaka, 2004). This machine outperforms its predecessor in capacity, uniformity, fuel efficiency, and operator comfort. Therefore, it is recommended as an effective solution for processing cassava stem waste into value-added products such as animal feed or compost.
Unjuk Kerja Mesin Perajang Biomassa Tipe Slicer untuk Perajangan Pelepah Kelapa Sawit Hafizh, Galang Dzakwan; Asmara, Sandi; Oktafri, Oktafri; Suharyatun, Siti
Jurnal Agricultural Biosystem Engineering Vol. 5 No. 1 (2026): March 2026
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v5i1.12376

Abstract

This study aimed to evaluate the performance of a slicer-type biomass chopper in processing oil palm fronds at different engine speeds (2000, 2350, and 2700 rpm). The observed parameters included working capacity, fuel consumption, material losses, and ergonomic aspects. The results showed that variations in engine speed significantly affected machine performance. The highest working capacity was achieved at 2700 rpm, reaching 465.96 kg/h, while the lowest was at 2000 rpm with 185.04 kg/h. Fuel consumption ranged from 1.29 to 1.70 L/h, with the lowest value at 2000 rpm and the highest at 2700 rpm. The lowest material loss was recorded at 2000 rpm (0.95%), whereas the highest occurred at 2700 rpm (2.44%). Ergonomic analysis indicated that the Cardiovascular Load (CVL) ranged from 31% to 36%, categorized as moderate workload and still tolerable for operators. Overall, the best performance was obtained at 2700 rpm due to its highest working capacity with relatively acceptable losses.
Pengaruh Dosis Penambahan Biochar Sekam Padi pada Tanah Pasir Terhadap Infiltrasi dan Kemampuan Tanah Menahan Air ( Water Holding Capacity ) Hartawan, Bagus; Suharyatun, Siti; Amien, Elhamida Rezkia; Tusi, Ahmad
Jurnal Agricultural Biosystem Engineering Vol. 5 No. 1 (2026): March 2026
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v5i1.12377

Abstract

Sandy soil is characterized by a high infiltration rate and low water retention capacity, making it less effective in supplying water for plant growth. This study aimed to analyze the effect of rice husk biochar application on infiltration and water retention capacity in sandy soil. The experiment was conducted from July to August 2024 at the Greenhouse of the Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. Four treatments were applied: A1 (0% biochar), A2 (10%), A3 (15%), and A4 (20%), each replicated three times. Observed parameters included soil moisture content, infiltration rate, water holding capacity, and the duration of water content change. Results indicated that rice husk biochar addition reduced the infiltration rate of sandy soil, with the lowest value observed in A4 (20%) at 6.42 mm/hour compared to the control A1 (0%) at 7.89 mm/hour. The time required for soil moisture to decrease from 14% to 8% was shortest in A1 (96 hours) and longest in A4 (456 hours). It can be concluded that rice husk biochar enhances the water retention ability of sandy soil and slows down moisture loss, with the 20% dose being the most effective treatment in improving water holding capacity.

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