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All Journal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Pengabdian kepada Masyarakat Jurnal Inovasi Mesin
Dewi, Sukhma Kusuma
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Agriculture, Biological Sciences & Forestry Humanities Economics, Econometrics & Finance Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Other

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KARAKTERISASI BIODIESEL PRODUK TRANSESTERIFIKASI MENGGUNAKAN VARIASI KECEPATAN SENTRIFUGASI PADA PROSES PEMISAHAN FAME Sukhma Kusuma Dewi; Lilis Yuliati; Agung Sugeng Widodo
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1082

Abstract

The biodiesel production by transesterification method has five stages, namely: (1) the preparation process; (2) the transesterification process, (3) the separation process, (4) the washing process; and (5) the drying process. Separation occurs independently using a split funnel and gravity force, which takes approximately 120 minutes. The length of this separation process makes it less time efficient in the biodiesel production process. Therefore, a centrifuge separates FAME and glycerol while accelerating the process. This study aimed to determine the quantity and quality of biodiesel made from CPO and VCO using centrifugal speed and separation time variations. The rotation speed is varied between 2000 rpm and 4000 rpm, while the separation times are 5 minutes and 10 minutes. The result showed that the highest quantity of biodiesel from CPO and VCO was obtained using high centrifugation speeds of 4000 rpm and a 10-minute separation. The result showed biodiesel produced with this variation has good quality which met with SNI.    
Analysis of biodiesel yield percentage from used cooking oil with variations in stirring time Dewi, Sukhma Kusuma; Faizal, Ahmad; Sutriyatna, Sutriyatna
Jurnal Inovasi Mesin Vol. 7 No. 1 (2025): APRIL 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v7i1.22431

Abstract

The increasing volume of hazardous and toxic waste (B3), particularly from used cooking oil, poses significant environmental and health challenges. One promising solution is converting this waste into biodiesel, thereby promoting renewable energy development while reducing ecological risks. This study investigates the yield percentage of biodiesel produced from waste cooking oil using a magnetic stirrer. The research aims to determine the optimal stirring duration to maximize yield and evaluate the flame duration of the resulting biodiesel. The process involved tool and material preparation, biodiesel production via transesterification, and subsequent data collection and analysis. The findings revealed that the highest biodiesel yield, 58.4%, was achieved at a stirring duration of 45 minutes, whereas the lowest yield, 51.2%, occurred at 60 minutes.
Screw Modification On Plastic Extruder Machine Andriani, Devi; Pratomo, Tri; Ariyanto, Muhammad; Suhendra, Diky Rahmat; Nurhaidah, Nurhaidah; Dewi, Sukhma Kusuma
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4582

Abstract

Plastic extruder machine is a machine that processes material changes from the form of plastic making into extruded changes from solid to liquid form. In the plastic extruder machine there are many machine components used. The components found in the plastic extruder machine are the frame, reduction gear, puller roller, bearing, v-belt, electric motor, pulley, stepper, clutch, air chamber, nozzle, feeder, compression spring, panel box and screw. This study uses an experimental method by changing the screw diameter which was originally 37 mm to 41 mm in addition to changing the diameter size, changes were also made to the screw pitch size which was originally 12 mm to 14 mm. The modified screw that was tested using PLA material with a rotation of 38 rpm produced a flow rate of 0.00129 m ^ 3 / s with a maximum pressure of 10.2866 Mpa. While the screw before modification produced a flow rate of 0.000921 m^ 3 / s and a maximum pressure of 9.5151 Mpa. From the data obtained from the screw, the modification results obtained quite good results compared to the screw before modification.
PENINGKATAN KETERAMPILAN DIGITAL PROTOYPING MELALUI PELATIHAN ADDITIVE MANUFACTURING UNTUK GURU DAN SISWA PRODI TEKNIK PERAWATAN MEKANIK SMK NEGERI 1 SUI KUNYIT, KAB. MEMPAWAH Dovian Iswanda; Alban Naufal; Nurhaidah, Nurhaidah; Muhammad Ibnu Rahsyid; Aripin Manurung; Dominikus Sulistiono; Supandi, Supandi; Sukhma Kusuma Dewi; Nurul Sa’adah; Alfin Bahri; Badar Khan
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 10 (2026): Maret 2026
Publisher : Bajang Institute

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Abstract

SMKN 1 Sui Kunyit, yang berlokasi di Kabupaten Mempawah dan berada di kawasan industri pelabuhan serta pengolahan hasil tambang, memiliki Jurusan Teknik Perawatan Mekanik yang bertujuan mencetak lulusan siap kerja di sektor industri. Saat ini, pembelajaran di jurusan tersebut masih mengandalkan teknik pemesinan konvensional seperti bubut dan frais. Guru dan siswa belum memiliki akses maupun wawasan terhadap teknologi manufaktur modern, khususnya additive manufacturing (AM) seperti 3D printing. Kondisi ini menimbulkan kesenjangan kompetensi antara lulusan dan kebutuhan dunia industri yang telah bertransformasi ke arah digital. Guru mengalami keterbatasan dalam mengembangkan kemampuan mengajar teknologi AM, sedangkan siswa tidak memiliki kesempatan untuk mengeksplorasi desain digital, slicing, dan proses pencetakan 3D. Hal ini berdampak pada terbatasnya inovasi dan kesiapan siswa menghadapi tantangan industri masa kini. Pelatihan additive manufacturing menjadi sangat penting untuk meningkatkan kapasitas guru dan kompetensi siswa secara langsung. Dengan dilaksanakannya pelatihan ini, sekolah akan mampu menjembatani kesenjangan teknologi, menguatkan daya saing lulusan, serta memperkuat posisi SMKN 1 Sui Kunyit sebagai sekolah vokasi yang adaptif terhadap perkembangan industri berbasis digital.
Co-Authors Agung Sugeng Widodo Ahmad Faizal Alfin Bahri ARIYANTO, MUHAMMAD Badar Khan Devi Andriani Dominikus Sulistiono Iswanda, Dovian Lilis Yuliati Manurung, Aripin Muhammad Ibnu Rahsyid Naufal, Alban Nurhaidah, Nurhaidah Nurul Sa’adah Suhendra, Diky Rahmat Supandi Sutriyatna, Sutriyatna Tri Pratomo