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Isolation, Characterization, and Identification of Biosurfactant-Production Bacteria from Used Cooking Oil Waste
Bioeksperimen: Jurnal Penelitian Biologi
Vol 11
, No 2
(2025)
Waste cooking oil constitutes a significant environmental concern in Indonesia. It has the potential to be utilized as a substrate for biosurfactant-producing bacteria. Biosurfactants are amphiphilic compounds produced by microorganisms, containing both hydrophilic and hydrophobic components that enable them to dissolve in both water and fats, as well as to reduce surface tension. This study aims to isolate, characterize, and identify biosurfactant-producing bacteria from waste cooking oil. Isol...
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Analisis Kinerja PLTU Barru POMU Unit 2: Evaluasi Net Plant Heat Rate dan Specific Fuel Consumption pada Berbagai Variasi Beban
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
This research aims to evaluate the performance of the Barru POMU Steam Power Plant (PLTU) Unit 2 through testing of Net Plant Heat Rate (NPHR), Specific Fuel Consumption (SFC), and Net Capability (Daya Mampu Netto - DMN). The tests were conducted at four variations of operating load, namely 75%, 85%, 92%, and 100%, using the input-output method and the heat loss method in accordance with the ASME PTC 4 standard. The test results show a Net Capability (DMN) of 44.64 MW. The lowest NPHR value was...
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The Enhancing Single Cell Protein Production of Saccharomyces cerevisiae Using Soybean Hull Waste with Dextrose Variations
Bioeksperimen: Jurnal Penelitian Biologi
Vol 11
, No 2
(2025)
Single Cell Protein (SCP) is a microprotein derived from the dry biomass of non-pathogenic microorganisms and offers a promising alternative protein source for both humans and animals. One of the advantages of SCP production is its potential to utilize organic waste as a growth medium, thereby contributing to environmental sustainability. Soybean hull waste has been identified as a nutrient-rich substrate capable of supporting the growth of various microorganisms used in SCP production. This stu...
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IMPROVING KNOWLEDGE ABOUT THE RED CHAIRMANSHIP THROUGH A QUIZ COMPETITION AT THE 14TH JUMBARA PMR EVENT PMI CITY OF SEMARANG
Jurnal Pengabdian Multidisiplin dan Pemberdayaan Masyarakat: Abdikes Trada
Vol 2
, No 2
(2025)
This study aims to evaluate the effectiveness of quiz competitions as an interactive learning medium to enhance students’ knowledge and understanding, particularly regarding humanitarian (Red Cross) education. The analysis shows that quiz competitions effectively improve students’ comprehension of humanitarian principles. Through this approach, students not only strengthen their cognitive abilities in understanding Red Cross concepts but also develop humanitarian values, discipline, and social r...
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PENERAPAN LEAN SIX SIGMA DALAM UPAYA MENGURANGI WASTE PRODUK CACAT PADA PROSES PRODUKSI CETAK DI PT XYC
Jurnal Ilmiah Sains dan Teknologi
Vol 7
, No 02
(2025)
Penelitian ini menerapkan metode Lean Six Sigma melalui pendekatan DMAIC (Define, Measure, Analyze, Improve, Control) untuk mengurangi cacat produksi pada kemasan fleksibel di PT XYC. Dari data produksi Desember 2024–April 2025, ditemukan tingkat cacat sebesar 9,2% dari total produksi. Tiga cacat utama yaitu blocking, delamination, dan tinta tidak kering yang menghasilkan 93% dari total kecacatan. Pengukuran kinerja proses menunjukkan rata-rata level sigma 3,0, menandakan perlunya peningkatan. A...
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Ergonomi, MSds, OWAS, Conveyor, PERANCANGAN FLEXIBLE DAN EXTENDABLE CONVEYOR UNTUK MENGURANGI MUSCULOSKELETAL DISORDER (MSDS) DAN MENINGKATKAN EFISIENSI PADA PROSES MUAT GULA KARUNG DI CV BANGKIT JAYA
Jurnal Ilmiah Sains dan Teknologi
Vol 7
, No 02
(2025)
Proses pemuatan gula karung manual di CV Bangkit Jaya menimbulkan permasalahan serius terkait kesehatan kerja dan efisiensi operasional. Operator mengalami Musculoskeletal Disorders (MSDs) dan proses kerja mengalami inefisiensi waktu hingga 40–60 menit per truk. Penelitian ini bertujuan untuk merancang desain conveyor yang fleksibel dan dapat diperpanjang (extendable) guna mengurangi risiko Musculoskeletal Disorders (MSDs) serta meningkatkan efisiensi operasional dalam proses pemuatan gula karun...
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SISTEM KERJA HOT METAL DETECTOR PADA ROLL TABLE INTERFACE PEMBUATAN BAJA PROFIL PT. KRAKATAU BAJA KONSTRUKSI
Teknika
Vol 10
, No 2
(2025)
PT. Krakatau Baja Konstruksi menerapkan teknologi Hot Metal Detector (HMD) yang terintegrasi dengan sistem roll table sebagai bagian dari upaya modernisasi proses produksi baja yang lebih efisien dan otomatis. Sistem HMD berfungsi untuk mendeteksi keberadaan logam panas yang keluar dari tungku pemanas (furnace), kemudian secara otomatis mengirimkan sinyal kendali untuk menggerakkan roll table agar material dapat berpindah ke tahap proses selanjutnya tanpa intervensi manual. Penelitian ini menggu...
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SISTEM KERJA PADA MESIN WINDING MURATEC QPRO EX DALAM PEMBUATAN BENANG
Teknika
Vol 10
, No 2
(2025)
This study aims to analyze the working system of the Winding Muratec QPRO EX machine used at PT Budi Texindo Prakarsa. The primary focus of this research is to understand the operational mechanism of the Winding Muratec QPRO EX machine, including the processes of yarn sorting and arrangement, the working principles of the system, and the identification of its main components. In addition, this study also discusses the aspects of maintenance and specific control measures required to ensure optima...
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DESIGN AND IMPLEMENTATION OF A PIEZOELECTRIC PEDESTRIAN-POWERED ENERGY HARVESTING SYSTEM FOR SUSTAINABLE URBAN INSTALLATIONS
Teknika
Vol 10
, No 2
(2025)
This project proposes integrating a pedestrian-powered system into a public installation to create a renewable energy source in urban environments. The system utilizes piezoelectric sensors embedded in the sidewalk to convert mechanical energy from footsteps into electrical energy, which is then used to power lights and display kinetic movement in the art installation. The main goal of this project is to provide a participatory, environmentally friendly, and sustainable solution in the form of a...
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IoT IMPLEMENTATION BASED ON POWER QUALITY NETWORK ANALYZER FOR 3-PHASE INDUCTION MOTOR CONTROL
Teknika
Vol 10
, No 2
(2025)
This study presents the design and implementation of a Power Quality Network Analyzer (PQNA) employing an ESP32 microcontroller to monitor and analyze key power quality parameters, including voltage, current, power factor, and total harmonic distortion (THD) for each phase of a three-phase induction motor. Traditional monitoring systems rely on manual or fixed data acquisition methods, which are inadequate for achieving efficient real-time data analysis. In contrast, the proposed system utilizes...
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