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Junaedi, Muhidong
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Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Isotherm Curve Model of Ciherang and Ciliwung Grain Varieties Yuni, Rahmawati; Junaedi, Muhidong; Haerani, Haerani
Salaga Journal Volume 03, No. 1, June 2025
Publisher : Program Studi Teknik Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70124/salaga.v3i1.1808

Abstract

The advancement of post-harvest technology in Indonesia has provided accurate models for predicting grain behavior during storage. This study aimed to determine the best sorption isotherm model for describing the equilibrium moisture content of Ciherang and Ciliwung rice varieties. Rice samples were stored in 18 desiccators containing salt solutions with relative humidity (RH) levels of 10–80% at temperatures of 30, 40, and 50°C. Water content parameters were measured and three models (Oswin, Kuhn, and Chung-Pfost) were evaluated based on their coefficient of determination (R²). The results indicated that the Chung-Pfost model yielded the highest R² values for both varieties. For Ciherang, the R² values were 0.921 (30°C), 0.938 (40°C), and 0.931 (50°C), while Ciliwung showed R² values of 0.894 (30°C), 0.915 (40°C), and 0.920 (50°C). The study concluded that the Chung-Pfost model effectively represents water absorption behavior in these rice varieties, with higher temperatures reducing the equilibrium moisture content
The Effect of Fermentation and Soaking Time on Water Content of Cocoa (Theobroma cacao L.) Sri Wahyuni, Rahman; Abdul, Azis; Junaedi, Muhidong
Salaga Journal Volume 02, No. 2, December 2024
Publisher : Program Studi Teknik Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70124/salaga.v2i2.1780

Abstract

Post-harvest handling, particularly fermentation and soaking, significantly affects cocoa quality. This study investigates the effects of fermentation duration (3, 5, 7 days) and soaking time (1, 2, 3 hours) on the moisture content of MCC 02 cocoa beans. The fermented beans were sun-dried, and moisture content was analyzed using the wet/dry basis method. Results showed the lowest wet basis moisture content of 55.65% for beans fermented for 3 days and soaked for 1 hour, and the highest of 63.1% for beans fermented for 3 days and soaked for 2 hours. After drying, the control sample had a moisture content of 7.7% (63.5% before drying), while the lowest moisture content for beans fermented for 5 days with 1-hour soaking was 7.95%, and the highest was 10.65% for beans fermented for 3 days with 1-hour soaking, exceeding the SNI standard (6-7%). Temperature fluctuations (28 - 37°C) and weather-dependent drying prolonged the process, resulting in higher moisture content than the standard, indicating the need for controlled drying methods.
Co-Authors Abdul, Azis Haerani Haerani Sri Wahyuni, Rahman Yuni, Rahmawati