Investigating drying kinetics of cassava chips under continuous and intermittent drying operation

Raden Faridz

Department of Agroindustrial Technology, University of Trunojoyo, Bangkalan, Indonesia

Raden Arief Firmasyah

Department of Agroindustrial Technology, University of Trunojoyo, Bangkalan, Indonesia

DOI: https://doi.org/10.14456/apst.2025.39

Keywords: Cassava Convective drying Intermittent drying Drying models Energy-saving

Abstract

Krepek tette is one of the popular cassava chips, which has become a signature snack from Pamekasan, Indonesia. Several studies have shown that its production process is significantly different from other chips, leading to distinct tastes and textures. One critical step in the process is drying, which largely depends on the open sun drying method. This method has been reported to produce better product quality but causes contamination and consumes more energy. To overcome the challenges, intermittent drying has been introduced as a novel technology that maintains product quality and consumes less energy. Therefore, this study aimed to determine drying kinetics of K. tette based on the thin layer drying model using 2 different methods, continuous and intermittent. Experiments were conducted with continuous and intermittent drying with an oven dryer at 50°C and 60°C. Intermittent drying was conducted by leaving the product out of the oven and placing it in a desiccator. The duration was 10 and 20 min, while the resting time was 20 and 40 min, respectively. The result showed that drying kinetics of K. tette provided a good fitting curve model based on the Midilli and Kucuk model for continuous and intermittent methods. In addition, intermittent drying at a resting time of 10 min provided a shorter effective drying time of 34% compared to the continuous method. The intermittent drying condition also had lower effective moisture diffusivity. These results confirmed that intermittent drying reduced energy consumption by shortening the effective drying time.

How to Cite

Faridz, R. ., & Firmasyah, R. A. (2025). Investigating drying kinetics of cassava chips under continuous and intermittent drying operation . Asia-Pacific Journal of Science and Technology, 30(03), APST–30. https://doi.org/10.14456/apst.2025.39

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