Sulphuric acid was an adequate acid to hydrolysis dried potatoes. Mathematical models obtained for the predictions of the process showed that the main operational variables are temperature and acid concentration. The optimization gave as optimal conditions: Temperature, 120 C; time, 60 min; acid concentration, 2.4 kg m!3 and liquid/solid ratio, 9.8 g g!1. The acid hydrolysis of dried potato was more efficient than enzymatic hydrolysis, allowing the generation of solutions containing 58.75 kg m!3 of glucose and only 0.47 kg m!3 of HMF.