Evaluación de la ósmosis inversa y de la evaporación de película ascendente como técnicas de concentración de hidrolizados de almidón de yuca Evaluation of reverse osmosis and climbing film evaporation as concentration techniques from starch hydrolysates of yucca Avaliação da osmose reversa e da evaporação de película como técnicas de concentração de hidrolisados de amido de mandioca
During the production of glucose syrup from yucca starch, the concentration step carries the highest energy costs in the process. Membrane technology (reverse osmosis) and unconventional evaporation methods (climbing film evaporation) arise as alternatives to traditional evaporation, because they are more energy efficient process. In this study, feed glucose solutions were used at 0.1 and 0.4g/ml. In the case of reverse osmosis, Filmtec ® and PCI ® membranes were used at 22 and 35.5°C and 21 and 37.5 bar of transmembrane pressure. For climbing film evaporation, pressures of 100 and 200bar and temperatures of 105 and 115°C were evaluated. With respect to reverse osmosis, the best results were obtained at 37.5bar and 35.5°C (higher transmembrane pressure and higher temperature), obtaining a volumetric concentration factor of 3.3 in 18min (with an initial glucose concentration of 10%w). Due to the
