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All Journal Jurnal Pendidikan Teknologi dan Kejuruan JMPM (Jurnal Material dan Proses Manufaktur) Turbo : Jurnal Program Studi Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering AL-JAZARI JURNAL ILMIAH TEKNIK MESIN Angkasa: Jurnal Ilmiah Bidang Teknologi Jurnal Tekno Insentif Jurnal Teknologi Terapan Journal of Renewable Energy and Mechanics Jurnal Teknik Mesin Indonesia KURVATEK Scientific Journal of Mechanical Engineering Kinematika MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering JTAM ROTARY Jurnal Ilmiah Teknik Mesin Poros Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Vortex Jurnal Pengabdian Masyarakat Bhinneka Journal of Engineering Researcher and Lecturer AMMA : Jurnal Pengabdian Masyarakat TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Majalah Teknik Mesin
Lathifa Putri Afisna
Institut Teknologi Sumatera
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Other

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Pengolahan Limbah Pelepah Pisang Terfermentasi Sebagai Alternatif Pakan Konsentrat Ternak Sapi Di Sanjaya Farm Afriansyah, Aidil; Mufidah, Zunanik; Sabar; Afisna, Lathifa Putri; Paundra, Fajar
Jurnal Pengabdian Masyarakat Bhinneka Vol. 1 No. 3 (2023): Bulan Februari
Publisher : Bhinneka Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58266/jpmb.v1i3.37

Abstract

Sanjaya Farm bergerak pada bidang peternakan sapi potong. Mulia farm terletak di Jl. Pulau Singkep Sukabumi, Bandar Lampung yang berjarak ± 7.3 Km dari Institut Teknologi Sumatera. Sanjaya Farm memiliki 20-30 sapi potong. Kendala yang dimiliki adalah dengan rantai pasok kebutuhan pakan yang masih dirasa kurang optimal. Sejauh ini pakan ternak pada mitra masih menggunakan singkong dan cocopeat, Kebutuhan rata rata pakan konsentrat perhari adalah 60-120 kg/hari. Sehingga dalam program ini kami menawarkan untuk memanfaatkan limbah pelepah pisang terfermentasi sebagai alternatif pakan konsentrat ternak sapi. Tujuan kegiatan Pengabdian kepada Masyarakat adalah untuk meningkatkan pengetahuan dan ketrampilan masyarakat dengan memanfaatkan limbah pelepah pisang dapat dijadikan sebagai alternatif pakan konsentrat ternak sapi menjadi sumber pakan bernutrisi tinggi, Kegiatan telah diaksanakan di lokasi mitra, pelaksanaan kegiatan minimal dua kali hingga pendampingan. Hasil kegiatan diikuti oleh 16 peserta pengabdian masyarakat menunjukkan hasil dimana dari 5 pertanyaan. 14 orang sudah memahami limbah pelepah pisang terfermentasi sebagai alternatif pakan dan manfaat pakan konsentrat bagi kesehatan ternak. Hasil ini menunjukkan peningkatan sebesar 75% dari hasil pretest.
PENGARUH VARIASI JUMLAH MICROBUBBLE GENERATOR (MBG) TERHADAP KENAIKAN KADAR DISSOLVED OXYGEN (DO) YANG DIHASILKAN PADA RUANG TERBUKA Supratman, WR; Afisna, Lathifa Putri; Harmiansyah, Harmiansyah
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 1 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i1.606

Abstract

Air bersih merupakan suatu kebutuhan yang sangat penting bagi kehidupan makhluk hidup yang dibutuhkan setiap hari. Dissolved Oxygen (DO) merupakan oksigen yang terlarut pada air yang yang disuplai oleh sebuah alat Microbubble Generator (MBG). Tujuan utama dari pengujian ini adalah untuk mengetahui kenaikan tingkat Disolved Oxygen (DO) serta oxygen transfer coefficient (KLa) yang terdapat di dalam air terhadap variasi debit air (QL) dan debit udara (QG) serta waktu aerasi. Metode penelitian yang digunakan adalah metode eksperimental dengan melakukan penelitian terhadap kinerja microbubble generator. Media utama pengujian ini menggunakan kolam terpal dan air bersih. Penelitian ini dilakukan pada ruang terbuka dengan dua buah MBG dengan tipe yang sama. Parameter pengujian yang digunakan adalah variasi debit air (QL) 20 lpm, 30 lpm, 40 lpm dan variasi debit udara (QG) 0,1 lpm, 0,5 lpm, 0,7 lpm serta waktu (t) aerasi selama 60 menit. Hasil dari penelitian ini menunjukkan bahwa kinerja multiple-microbubble generator lebih optimal untuk menghasilkan kadar oksigen terlarut. Nilai DO yang dihasilkan sebesar 1,7 mg/L – 2,3 mg/L. Pengaruh dari debit air (QL) menunjukkan bahwa semakin tinggi debit air (QL) yang diberikan, maka peningkatan kadar oksigen terlarut didalam air akan lebih cepat dan signifikan. Nilai KLa yang dihasilkan berbanding lurus dengan kecepatan aliran, semakin tinggi kecepatan aliran yang diberikan maka akan semakin besar nilai KLa yang dihasilkan.
Adsorbent-based biogas quality analysis through purification process Afisna, Lathifa Putri; Verdia, V Daniel; Syaukani, Muhammad; Saputra, Aprizal
Jurnal Pendidikan Teknologi Kejuruan Vol 5 No 3 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v5i3.27623

Abstract

Biogas is a raw material utilized to produced biogas. Biogas is renewable energy source produced by the anaerobic activity of organic matter through the fermentation process. Quality of biogas is determined by its main composition, such as methane (CH4). In addition, the composition of biogas also contains impurities such as unburnt carbon dioxide (CO2) so that it reduces the heating value, hydrogen sulfide (H2S) and water vapor (H2O) which are corrosive as well as Nitrogen (N2). Adsorption method on the impurity compositions can be used to improve biogas quality. This research used a column purifier containing four adsorbents in the form of calcium hydroxide Ca(OH)2, iron gram (Fe2(O3)), zeolite and activated carbon with three volume variations 600 cm3, 900 cm3 and 1200 cm3. The results of biogas testing using gas chromatography showed that the best quality obtained from the 1200 cm3 volume of adsorbent. Methane content was increased up to 17.985% and the impurity gases were decreased, such as carbon dioxide in as much as 18.15%, hydrogen sulfide and water vapor in as much as 0.182%. The heat produced by unpurified biogas was 1518.312 kJ/m3 and the highest heating value after purification was 2108.22 kJ/m3. The biogas combustion resulted in a dominant blue flame color.The most optimum effectiveness of the technology resulted in an increase of the methane content up to 64.275%. Based on this research, the utilization of column purifier with the adsorption method was able to improve the quality of biogas
Experimental Study Of Wear Testing Of ASTM 440C Steel On A Ball-On-Disc Tribometer Using Variations Of Lubricants Sitorus, Jhonatan Jufrianto; Silitonga, Dicky Januarizky; Kolala, Putra Andi; Afisna, Lathifa Putri; Alfian, Devia Gahana Cindi
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 4 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i4.896

Abstract

Bearings are important components in industry that function to reduce friction between moving parts for smoother and more efficient movement. However, friction that occurs can cause wear on the bearing surface. This study aims to analyze the wear volume, wear width, and wear rate of ASTM 440C steel material with variations of SAE 10W-30, SAE 10W-40, and SAE 140 lubricants at rotational speeds of 180 rpm, 270 rpm, and 310 rpm. Testing was carried out using a tribometer. ball-on-disc with a constant time of 10 minutes. The test results showed that the lowest wear width was obtained in SAE 10W-40 lubricant of 259.806 µm at 180 rpm, while the highest value of 417.894 µm also occurred in SAE 10W-40 at 270 rpm. The lowest wear volume was recorded in SAE 10W-40 of 0.0225 mm³ at 180 rpm, while the highest was 0.0942 mm³ at 270 rpm with the same lubricant. For the wear rate, the lowest value of 0.50 × 10?? g/mm²·s was found in SAE 140 lubricant at 180 rpm, while the highest was 1.58 × 10?? g/mm²·s occurred in SAE 10W-40 at 270 rpm. Overall, SAE 10W-40 lubricants are more suitable for use at low revs, while SAE 140 lubricants are recommended for high revs due to their greater viscosity and resistance to wear.
Characteristics of Briquettes Produced from Rubber Seed Shell and Palm Kernel Shell Using Tapioca Flour as Binder Jayadi, Farid; Cindi Alfian, Devia Gahana; Pratama, Muhammad Hasbi; Nurullah, Fajar Perdana; Silitonga, Dicky Januarizky; Afisna, Lathifa Putri
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.v14i2.4607

Abstract

Indonesia faces challenges in managing renewable energy as an alternative to fossil fuels. This study aims to compare commercially available briquettes with experimental briquettes produced from a mixture of rubber seed shells and palm shells using tapioca flour as a binder. The raw material composition variations between rubber seed shells and palm shells used were 80:20, 50:50, and 20:80, with 10% tapioca flour binder, and dried at a temperature of 100°C for 3 hours. The purpose of this research is to compare the produced briquettes with those already marketed. Based on the experiments and tests carried out, the results show that the 20:80 variation produced briquettes most comparable to the market samples, with a density of 0.7438 g/cm³, moisture content of 3.43%, calorific value of 6849.46 cal/gram, combustion rate of 0.1117 g/minute, and a drop test value of 4.7672%.
EXPERIMENTAL STUDY ON THE EFFECT OF PV TILT ANGLE ON MINI SOLAR POWER BANK PERFORMANCE Kolala, Putra Andi; Afisna, Lathifa Putri; Wibowo, Wuwuh Saminto; Putra, Aditya Septian; Carlo, Antonio; Pambayun, Fajar Bagas; Huda, Fajar Nur
Jurnal Dinamika Vokasional Teknik Mesin Vol. 11 No. 1 (2026)
Publisher : Department of Mechanical Engineering Education

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

Abstract

Solar panels are devices designed to convert solar energy into electrical energy through the photovoltaic (PV) effect, offering a sustainable solution for portable power needs. This study investigates the effect of solar panel tilt angles on the performance of a mini solar cell power bank in Institut Teknologi Sumatera, South Lampung, Indonesia. A 2.5 W monocrystalline silicon panel was tested at tilt angles of 15°, 30°, and 45°. Data on current, voltage, temperature, and power were collected at 30-minute intervals from 09:00 to 15:00 WIB over three separate clear-sky measurement days. The results indicate that the 15° tilt angle produced the highest average current (38.39 mA), voltage (4.08 V), and power (0.162 W). The estimated charging time for a 3000 mAh battery was 93.77 hours (15°), 116.13 hours (30°), and 138.04 hours (45°). The 15° tilt is the optimal configuration for portable solar power banks in this tropical region.
Analisis Pengaruh Variasi Rasio Komposisi Ampas Tebu Dan Arang Tempurung Kelapa Terhadap Karakteristik Briket Muhammad Firmansyah Suherman; Rico Aditia Prahmana; Achmad Gus Fahmi; Lathifa Putri Afisna; Farid Jayadi; Devia Gahana Cindi Alvian; Pathur Razi Ansyah
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 18, No 2 (2026): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v18i2.3990

Abstract

In Indonesia, basic energy needs still depend on natural gas, coal, and petroleum until their availability is decreasing. Bagasse and coconut shell charcoal briquettes offer the best solution as an alternative energy source that is environmentally friendly and abundantly available. This study aims to analyze the effect of variations in the composition of bagasse (AT) and coconut shell charcoal (TK) using tapioca starch adhesive on the characteristics of the briquettes. The compositions tested were 25% AT : 75% TK; 30% AT : 70% TK; 35% AT : 65% TK. The briquettes were evaluated based on parameters such as calorific value, carbon content, ash content, water content, volatile matter content, and combustion rate. The results showed that the briquettes with composition variations of 25% bagasse and 75% coconut shell charcoal had a calorific value of 5721.63 cal/g, carbon content of 64%, ash content of 8%, water content of 7.56%, volatile matter content of 28%, and a combustion rate of 0.19 grams/minute. However, only the water content value that meets SNI 1683/2021 quality 1 is ≤ 8%
Co-Authors Achmad Gus Fahmi Adi Prayoga Adimas, Fransiskus Adryansyah, Rizky Sultan Afriansyah, Aidil Ahmadien, Ichwan Kurnia Aji Suwito Akasah, Ahmad Anugrah, Galang Arirohman, Ilham Dwi Azriel Windiarto Carlo, Antonio Cindi Alfian, Devia Gahana Deendarlianto Devia Gahana Cindi Alfian Devia Gahana Cindi Alvian Dicky Aufa Mahesha Dicky J. Silitonga Eko Pujiyulianto Fadillah Ramadhani Fajar Nur Huda Farid Jayadi Faturrizky Rakha Yudanta Fellando Martino Nugroho Fitrah Qalbina Fransisco Dino Permadi Gilang Handi Wibowo Gita Johannes Saragih Goklas Miracle Siahaan Guguk, Kardo Raja Harianja, Martua Jaya Harmiansyah Heni Pornawati Hidayatullah, M Taufik Indarto Indarto Irfan Dafa Denara Isak, Rabin Jayadi, Farid Kardiansyah Krisna Pratama Wibisono M.Riyan Kaspari Maharani, Ajeng Meha, Gabriel Mufidah, Zunanik Muhammad Firmansyah Suherman Muhammad Lasin Muhammad Syaukani Muhyi, Abdul Ningsih, Wulan Nurullah, Fajar Perdana Oktavirnanda Oktavirnanda P Pambayun, Fajar Bagas Pasaribu, Frans Winner Pathur Razi Ansyah Paundra, Fajar Prahmana, Rico Aditia Pratama, Muhammad Hasbi Pujiyulianto, Eko Putra Andi Kolala Putra, Aditya Septian Rahadi, Bagas Nugroho Jati Ramadhan, Ahmad Fikri Ramadhanty, Nabila Riayatsyah, Teuku Meurah Indra Rico Aditia Prahmana Rizky Faesal Sadikin Rodian, Afiko Rori Zarhimsyah Ruly Davisca Pratama Rustam Efendi Ruzaki Fatra Jaya SABAR Saputra, Aprizal Selamet Riski Amiludin Shintha Sarmila A.S Yahya Silitonga, Dicky Januarizky Sindhu, I Gede Pande Naraya Siregar, Ilham Ramadhan Sitorus, Jhonatan Jufrianto Sugatra Dwi Atmaja Supratman, WR Syah, Muhammad Aksel Teuku Meurah Indra Riayatsyah Theodorus Rendy Prasetya Verdia, V Daniel Vicky F Sanjaya Wibawa Endra Juwana Wibawa Endra Juwana Wibowo, Wuwuh Saminto Yopi Rusdian Santoso