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Bambang Dwi Argo
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Agriculture, Biological Sciences & Forestry Computer Science & IT

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ANALYSIS OF OHMIC HEATER EFFICIENCY IN THE PRODUCTION OF LIQUID PALM SUGAR BASED ON FREQUENCY AND POWER Rucitra Widyasari; Bambang Dwi Argo; Anang Lastriyanto; Susinggih Wijana
Jurnal Teknologi Pertanian Vol. 26 No. 2 (2025)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtp.2025.026.02.5

Abstract

Arenga sap is traditionally evaporated to produce liquid palm sugar. This process takes a time-consuming, energy-intensive, and results in varying quality. As an alternative technology, ohmic heating is expected to improve product quality by analyzing frequency and power variations to control temperature, current strength, and the quality of liquid sugar from arenga sap, compared to conventional methods. The study shows that increasing the frequency and power speeds up the evaporation process, which improves efficiency during ohmic heating. Efficiency is measured in three phases: the temperature increase phase, the temperature stability phase, and the temperature decrease phase. At a frequency of 250 Hz and 120 W, the highest efficiency recorded is 68.06%, with an average of 24.33%. This high efficiency also indicates that the quality of the liquid sugar produced from the arenga palm sap is improved, due to less damage to its functional properties.
DESAIN DAN PERFORMA SISTEM PEMANAS INDUKSI PADA REAKTOR BATCH UNTUK PRODUKSI FURFURAL Syahrizal; Bambang Dwi Argo; Yusuf Wibisono
Jurnal Teknologi Pertanian Vol. 26 No. 3 (2025)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtp.2025.026.03.8

Abstract

Efisiensi proses dehidrasi dalam produksi furfural, sangat dipengaruhi oleh akurasi suhu. Penelitian ini bertujuan merancang reaktor tipe batch berpengaduk, menggunakan sistem “induction heating” tipe kumparan pancake coil dan kontrol suhu PID guna meningkatkan efisiensi proses dehidrasi. Penelitian terdiri dari dua tahap yaitu perancangan dan pembuatan prototype, serta pengujian. Bahan reaktor menggunakan stainless steel 304 dengan kapasitas 250 mL. Hasil penelitian menunjukkan bahwa sistem pemanas induksi mampu bekerja dengan baik untuk proses dehidrasi xilosa menjadi furfural pada reaktor batch pada suhu 100 °C dicapai selama 25 menit 4 detik. Suhu terbaik untuk proses dehidrasi xilosa menjadi furfural diperoleh pada suhu 150 °C, konsentrasi furfural yang dihasilkan pada suhu tersebut cenderung stabil berkisar 480–490 mg/L. Implementasi kontrol PID menghasilkan stabilitas suhu dengan deviasi ± 1 °C dari setpoint, yang berkontribusi pada peningkatan efisiensi reaksi.
DESIGN OF ERGONOMIC WEED-WEEDING MACHINE WITH ANTHROPOMETRIC APPROACH Subchan Asyari; Sugiono; Panji Deoranto; Bambang Dwi Argo
Jurnal Teknologi Pertanian Vol. 26 No. 3 (2025)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtp.2025.026.03.7

Abstract

In the weeding process, farmers still use the conventional method of swinging the sickle horizontally over the weed-covered soil repeatedly until the weed stems are cut and flush with the ground. This process can lead to rapid fatigue, especially in the musculoskeletal system or skeletal muscles. When weeding, the average farmer's back bends at a 90-degree angle while repeatedly pulling out weeds. In designing this machine, an anthropometric approach is used to determine the ergonomic design of the weed mower that provides worker comfort. Anthropometry is the study of human body dimensions and their application in design, including physical geometry, mass, strength, and body characteristics such as shape and size. Humans vary in shape, size, height, and weight. The sample size is 23 workers. Based on the research conducted on the weed, the researchers proposed an ergonomic weed-weeding machine design based on an anthropometric approach. The anthropometric measurements obtained are the height of the weed-weeding machine is 120.7 cm, the width range of the weed-weeding machine is 46.8 cm, and the depth range of the weed-weeding machine is 42.0 cm, using the results of the 50th percentile. The design of this weed-weeding machine is expected to have practical implications, including increased comfort and work efficiency for farmers, which in turn can speed up the weeding process and increase rice productivity. This design is also expected to encourage innovation in the field of work system design and ergonomics.
Co-Authors Anang Lastriyanto Panji Deoranto Rucitra Widyasari Subchan Asyari Sugiono, Sugiono Susinggih Wijana Syahrizal Yusuf Wibisono