Optimization of Hot-Air Drying Assisted with Incandescent Lamp of Red Seaweed (Chondracanthus chamissoi) Using Response Surface Methodology

Vivanco-Cuba E.E.; Vivanco-Pezantes D. · Journal of Agricultural Machinery (2026) · DOI: 10.22067/jam.2025.89911.1283

Resumen

Seaweeds are well known for their technological, nutritional, and health values, and their preservation by drying is essential to stabilize and maintain the quality of the product during storage. The research presents the obtaining of mathematical models in polynomial functions using the response surface methodology. The influence of the independent drying variables was studied: load density (1.70-15 kg m-2), incandescent lamp wattage (0–500 W), temperature (30–70 °C) and air velocity (0.5-2.5 m s-1) on the response variables: global acceptance (-), total phenolic content (mg GAC/100 gdb) and drying time (min). The study also showed that the conditions of temperature and incandescent lamp wattage during drying significantly affected the total phenolic content. The optimum conditions were: load density 9.13 kg m-2, incandescent lamp wattage 374.5 W, temperature and drying air velocity of 63.3 °C and 1.88 m s-1, respectively. The results show that increasing the power of the incandescent lamps leads to a shorter drying time of approximately 40-45%. For these optimized conditions, mathematical models were applied to simulate the drying curve and kinetics of the material studied. Using the Quasi-Newton Simplex method, the models of Midilli et al. and Page in second place, achieved a better performance in the quality of fit of the curves to the experimental data. Under these conditions, the value of the effective diffusivity of water was of the order of 2.03×10-11 m2 s-1, a value very similar to those published for agro-industrial products. The information obtained can be of great help in the use of the obtained parameters and applied techniques for the development of equipment and process control in the drying of red seaweed. © (2026), (Ferdowsi University of Mashhad). All rights reserved.

Instituciones: Universidad Nacional de Ingeniería; Universidad Nacional del Callao