Revista Mexicana de Ingeniería Química, Vol. 22, No. 3 (2023), Alim23145

Osmotic dehydration of cassava bagasse (Manihot esculenta) and its effect as pretreatment on the efficiency of convective drying

J.G. Serpa-Fajardo, G. Fernández-Lambert, D.F. Narváez-Guerrero, E. Hernández-Ramos, L.C. Sandoval-Herazo



The cassava bagasse is an agroindustrial residue from the cassava starch industry which entails concerning environmental challenges. High moisture content and hydrophilic nature make it difficult to apply conventional drying efficiently. Osmotic dehydration (OD) is evaluated directly in this research, and taken as a pretreatment to convective drying (OD-Drying) of this residue with hypertonic NaCl solutions between 30% and 60% OD and between 5% and 20% in OD-Drying, using rates of 3 to 5 g solution/g sample, with an air velocity of 1.5 m/s and at 40° C. OD alone reduced cassava bagasse moisture  in 67.25 %, while OD-Drying reduced moisture in 86.3 % and drying time  to 41.1 % saving energy up to 51,913.8 kJ when applying OD-Drying. Found results show that OD improves convective drying of cassava bagasse, providing benefits in its post-industrial handling such as mitigation of the environmental problem associated with it, contributing this way to the sustainable development of the starch industry that can also be applied to other agroindustrial residues.

Keywords: Convective drying, cassava bagasse, sustainable development, agroindustry, starch.



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