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All Journal Agrointek VANOS Journal of Mechanical Engineering Education JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) International Journal of Innovation in Mechanical Engineering and Advanced Materials
Darwin Sebayang
Universitas Mercu Buana
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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ANALISIS PENGARUH PERLAKUAN KAVITASI ULTRASONIK TERHADAP STRUKTUR MIKRO PADA DAUN TANAMAN NILAM (Pogostemon cublin benth) Rezky Eko Bawono; Hendi Saryanto; Darwin Sebayang
AGROINTEK Vol 15, No 1 (2021)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v15i1.9292

Abstract

Essential oils are one of Indonesia's natural products that are widely used as the basic ingredients of medicines, perfumes, as flavor and food preservatives, aromatherapy, vegetable pepticides and so on. Raw materials for essential oils can be in the form of leaves, flowers, logs, bark, fruit seeds, roots or rhizomes. Essential oils in aromatic plants are found in oil glands, vessels, oil sacs or hair glands (grandular). The test uses the leaves of patchouli as a testing medium. To optimize the production of essential oils on patchouli leaves, prefix treatment is needed. This treatment is expected to help the process of macro and micro cell destruction. At the macro level, this cell destruction can be done by chopping or counting raw materials. However, for micro-cell destruction can be done by giving high waves to raw materials. In this case the intended waveform is an ultrasonic wave with 40 kHz. The variables compared in this study were ultrasonic treatment and the duration of treatment given. The first experiment compared the patchouli leaves that were exposed to ultrasonic and those that did not use ultrasonic. Then, the second experiment using ultrasonic for 15 minutes and 60 minutes. After the ultrasonic process is done, then using scanning electron microscopy to see the micro-structure of the leaves. The results of this study found that the leaf structure that was not subjected to ultrasonic treatment had a neater oil bag compared to those affected by ultrasonic. Further results were obtained that the ultrasonic duration also affected the micro-structure of the leaves
OPTIMIZATION OF SOLAR-WIND-DIESEL HYBRID POWER SYSTEM DESIGN USING HOMER Ignatius Agung Wibowo; Darwin Sebayang
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 1, No 1 (2015)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v1i1.18886

Abstract

Indonesia has a lot of potential for renewable energy. Electricity generation from hybrid solar and wind energy will be a prospective solution to fulfill electricity supply for remote and rural communities. Although diesel generator was still part of the hybrid power system, however, with a proper design, the fuel consumption could be reduced significantly. HOMER software was utilized to aid the design process by providing optimum configuration of the hybrid power system components in terms of performance and economy.
EFFECT OF ANNEALING ON MAGNETIC AND STRUCTURAL PROPERTIES OF THE NANOCRYSTALLINE Fe-Mn-Al ALLOYS Kontan Tarigan; Darwin Sebayang
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 2, No 1 (2016)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v2i1.18953

Abstract

In this work, the formations of Fe55Mn10Al35 nanocrystalline alloys were made by using mechanical alloying (MA) technique with the milling time of 24 hrs and then annealed at 300, 500, and 700oC. The sizes and the morphology of the particles were checked by using a Scanning Electron Microscope (SEM). The magnetic properties were characterized by using a Vibration Sample Magnetometer (VSM), and it give results both of the magnetic saturation (Ms) and Coercivity (Hc) are decreased respect to annealing temperatures. Last one; the structures were characterized by using an Extended X-ray Absorption Fine Structure (EXAFS) and X-Ray Diffraction (XRD). It give results that the structures were single phase at 24 hrs milled and 300oC annealed, then the structure to be changed at 500 and 700oC.
Message from Editor in Chief Darwin Sebayang
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 5, No 1 (2023)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

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Abstract

Pemanfaatan Limbah Kantin Sekolah Menjadi Pupuk Organik Sebagai Teknik Pengolahan Sampah di Sekolah Nur Indah; Darwin Sebayang; Rita Sundari; Subekti Subekti; R. Ariosuko; Fajar Anggara; Gian Villany Golwa
JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) VOL. 8 NOMOR 2 JULI 2024 JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat)
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/jppm.v8i2.21272

Abstract

Tujuan kegiatan ini adalah untuk keterampilan dan kemampuan dalam pembuatan pupuk organik cair pada siswa SMKN 35, dalam rangka mengurangi pencemaran lingkungan akibat limbah kantin disekolah. Pelatihan ini terdiri dari dua bagian, yaitu indoor dan outdoor. Dalam indoor diberikan materi mengenai proses dan prosedur pembuatan sampah menjadi pupuk cair. Sedangkan outdoor melakukan praktek cara pembuatan tabung composer dan cara pembuatan pupuk organik cair dari limbah yang berasal dari kantin dan buah-buahan yang busuk. Sehingga siswa-siswi SMKN 35 dapat memperoleh pengetahuan dan keterampilan cara membuat pupuk cair organik dari limbah kantin dan buah-buahan busuk. Hasil kegiatan juga berupa antusiasme dan semangat siswa-siswi yang mengikuti pelatihan sebanyak 30 orang menunjukkan ketertarikan dalam praktek pembuatan pupuk cair organik dari limbah.
Innovation of Aluminum Waste Fuel Stove R Dwi Pudji Susilo; Mohamad Abror; Muhamad Fitri; M. Azizi; Dafit Feriyanto; Darwin Sebayang
VANOS Journal of Mechanical Engineering Education Vol 9, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v9i2.28293

Abstract

Aluminum waste is a challenging material to manage due to its high production rate from households and industries. This study aims to repurpose aluminum waste into hydrogen gas, which can serve as an alternative fuel for gas stoves. Direct disposal of aluminum waste can lead to environmental damage; hence, this project focuses on developing a system that dissolves aluminum using sodium hydroxide (NaOH) to produce hydrogen gas in a tube reactor. This hydrogen is then used as stove fuel. The comparison between aluminum-fueled hydrogen and conventional fuels, such as Pertalite and LPG, suggests that aluminum waste has potential as a cost-effective fuel source. For instance, one liter of Pertalite at Rp. 10,000 powers a motorbike for approximately 30 km, translating to Rp. 1,428 for a similar distance with aluminum-derived fuel. A 3 kg LPG cylinder costs around Rp. 24,000 and provides 10 hours of fuel, whereas hydrogen produced from aluminum can be cheaper if sourced from waste. Additionally, this design incorporates a refillable reactor that sustains hydrogen supply during combustion, ensuring consistent stove operation. The system is portable, safe, and offers high mobility, making it practical for various applications. This approach not only reduces aluminum waste but also presents an affordable alternative fuel solution, enhancing environmental sustainability.
Co-Authors Dafit Feriyanto Fajar Anggara Gian Villany Golwa Ignatius Agung Wibowo Kontan Tarigan M. Azizi Mohamad Abror Muhamad Fitri Nur Indah R Dwi Pudji Susilo R. Ariosuko Rezky Eko Bawono Saryanto, Hendi Subekti Subekti Sundari, Rita