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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Kartika Kimia Journal of Applied Engineering and Technological Science (JAETS) Jurnal Abdi Insani Jurnal Rekayasa Energi dan Mekanika International Journal of Science and Society (IJSOC) Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Pengabdian Pada Masyarakat Jurnal Polimesin Indonesian Journal of Humanities and Social Sciences
Selly Septianissa
Department Of Mechanical Engineering, Faculty Of Engineering, Widyatama University, Bandung 40125, Indonesia
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Experimental Study on Solar Drying of Arabica Coffee Beans: Achieving Standard Moisture Content Using a Drying Chamber Collector Hilman Mafazi; Selly Septianissa; Ahmad Rajani
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.107-116

Abstract

Drying technology plays a critical role in preserving and enhancing the quality of agricultural products, particularly in the post-harvest handling of Arabica coffee. In this experimental study, Arabica coffee beans were dried using a solar drying chamber equipped with a collector system to achieve standard moisture content. A total of 6000 grams of coffee beans were dried over 28 hours, with the system operating under an average chamber temperature of 40°C and a peak solar radiation intensity of 1122 W/m² occurring at 12:00 PM. The drying process utilized an air velocity of 9.2 m/s to enhance heat and mass transfer within the chamber. Among all trays tested, tray 2 produced the best quality beans with a final moisture content of 11.8%, aligning with the recommended standard for green coffee storage. These results demonstrate that integrating high air velocity and optimized collector design in a solar drying chamber can significantly reduce moisture content while maintaining bean quality, thereby offering an effective and sustainable alternative to conventional drying methods.
Enhancing Corrosion Resistance of AISI 1045 Carbon Steel Using Rosmarinus officinalis Extract: An Environmentally Friendly Approach Pawawoi, Pawawoi; Putra, Adi Ganda; Lesmana, Dera; Prajitno, Djoko Hadi; Septianissa, Selly
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia (In Progress)
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.976

Abstract

Corrosion is the greatest challenge faced by various industries, especially those in maritime regions. This study evaluates the effectiveness of Rosmarinus officinalis extract as a corrosion inhibitor for carbon steel AISI 1045 in artificial seawater. Steel samples with varying inhibitor concentrations (0, 30, 60, 90, and 120 ppm) were immersed for 25 days. The results indicate that the weight gain due to corrosion for the sample without an inhibitor reached 79.5 mg, while the use of rosemary significantly reduced the weight gain, with the lowest corrosion rates recorded at 90 ppm (0.003 mpy) and 120 ppm (0.005 mpy). The optimal inhibitor efficiency was achieved at 60 ppm (75.57%). Microstructural analysis showed a decrease in pitting corrosion thickness and the formation of a new phase, Fe₃O₄, which is more stable and protective. These findings emphasize the potential of rosemary extract as an environmentally friendly solution for controlling corrosion in carbon steel, particularly in corrosive environments like seawater.
Co-Authors Adi Ganda Putra Ahmad Rajani Ayu Zahra Chandrasari Djoko Hadi Prajitno Hadining, Wanidya Ni’immallaili Hilman Mafazi Komang Widhi Widantha Komarudin, Udin Lesmana, Dera Martoni Muhamad Waldi Nugraha, Suhud Pawawoi, Pawawoi Prasetia, Adhita R Evi Sovia Rajani, Ahmad Ramdhani, Rendi Suryaman, Nia Nuraeni Trisnawan , Lukman Waldi, Muhamad Zanika, Sugih Yusuf