Zveme Vás na obhajobu dizertační práce pana Ellyase Alga Nainggolana na téma “Influence of Drying Pretreatment on Oven and Solar Drying of Cassava Tubers (Manihot esculenta)” (Katedra udržitelných technologií, obor Sustainable Rural Development). Obhajoba práce proběhne dne: 9.9.2025 od 11:30 hod v zasedací místnosti č. 313 (budova FTZ).
The dissertation by Ellyas Alga Nainggolan investigates the optimization of cassava flour production through a comprehensive evaluation of pretreatment methods and drying systems. Fresh cassava tubers underwent chemical, thermal, and soaking pretreatments before being dried using oven and solar systems. The study employed response surface methodology (RSM) to optimize oven drying parameters, achieving improved moisture reduction, whiteness index, and sensory attributes. Mathematical modelling identified the logarithmic model as most suitable for oven drying and the Wang and Singh model for solar drying. Application of optimized pretreatment in solar drying enhanced drying kinetics, effective moisture diffusivity, and physicochemical quality, while preserving starch granule structure. The findings demonstrate that integrating optimized pretreatments with controlled drying protocols can significantly improve cassava flour’s nutritional, sensory, and functional properties, supporting sustainable, energy-efficient processing for industrial and small-scale applications.