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All Journal ARMATUR : Artikel Teknik Mesin dan Manufaktur Indonesian Journal of Innovation Studies
A’rasy Fahruddin
Program Studi Teknik Mesin, Universitas Muhammadiyah Sidoarjo, Indonesia
Aerospace Engineering Automotive Engineering Computer Science & IT Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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ANALISA VARIASI SUHU PADA PROSES DESTILASI BIOETANOL DARI BIJI JAGUNG Rangga Bayu; A’rasy Fahruddin; Rachmat Firdaus; Edi Widodo
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10158

Abstract

The increasing demand for renewable energy has encouraged research into the development of bioethanol from abundant local raw materials, one of which is corn kernels which are rich in starch. This study was conducted to determine the effect of variations in distillation temperature on the volume and purity of bioethanol produced from fermented corn kernels. The research process begins with material preparation, namely sowing corn kernels until they germinate, grinding, then fermenting with yeast (Saccharomyces cerevisiae) for 7 days. The fermentation results were then distilled for 30 minutes using a simple distillation apparatus with three temperature variations, namely 70°C, 80°C, and 90°C. The volume of bioethanol was measured using a measuring cup, while the ethanol content was tested using an alcohol meter. The results showed that at a temperature of 70°C a volume of 130 ml of bioethanol was obtained with a purity of 67%, at a temperature of 80°C a volume of 168 ml was obtained with the highest purity of 83%, while at a temperature of 90°C the volume increased to 191 ml but the purity decreased to 73%. The data demonstrates a trade-off between ethanol volume and purity, where higher heating temperatures increase volume, but purity does not always increase. This study concludes that the optimal distillation temperature is 80°C, as lower energy can produce bioethanol with a combination of a relatively large volume and the highest purity.
Ergonomic Assessment of Non Folding Electric Wheelchair Performance: Penilaian Ergonomis terhadap Kinerja Kursi Roda Listrik Non-Lipat Anggit Prastio; A’rasy Fahruddin
Indonesian Journal of Innovation Studies Vol. 26 No. 1 (2025): January
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i1.2164

Abstract

General Background: Electric wheelchairs are widely used to support mobility and daily activities for individuals with physical disabilities. Specific Background: User comfort and operational capability of electric wheelchairs are strongly associated with ergonomic suitability, anthropometric compatibility, and technical performance under different operating conditions. Knowledge Gap: Previous studies have not sufficiently evaluated the relationship between user anthropometry, upper limb posture, and the mechanical performance of non folding electric wheelchairs for users with specific physical limitations. Aims: This study aimed to evaluate the ergonomic suitability and performance characteristics of a non folding electric wheelchair using anthropometric analysis, Rapid Upper Limb Assessment (RULA), and propulsion and steering performance testing. Results: The findings showed several mismatches between user body dimensions and wheelchair dimensions, particularly in footrest height, footrest length, and armrest height. RULA analysis produced a score of 4, indicating that posture modifications are required. Performance testing demonstrated that the wheelchair could carry loads up to 120 kg and travel approximately 15.36 km on a full battery charge, but limitations were identified in climbing ability, maximum speed, steering control, and obstacle clearance. Novelty: This study integrates ergonomic evaluation and technical performance testing on a non folding electric wheelchair designed for users with asymmetric physical conditions. Implications: The results provide practical recommendations for improving wheelchair ergonomics, steering stability, energy efficiency, and mechanical configuration to support safer and more comfortable mobility for users with disabilities.Highlights: Anthropometric comparison identified dimensional mismatches in armrest and footrest configuration. Postural evaluation indicated corrective adjustment requirements for upper body positioning. Mechanical testing revealed limitations in slope navigation, steering response, and maximum travel speed. Keywords: Electric Wheelchair; Ergonomic Assessment; Anthropometry; RULA; Wheelchair Performance
Co-Authors Anggit Prastio Edi Widodo Rachmat Firdaus Rangga Bayu