Due to pandemic, supply of alcohol as desinfectant really needed for nowadays. This research aims to determine the levels of bioethanol produced from banana rods by the hydrolysis process. The target to be achieved with the reactor design is to achieve high ethanol purity using a first order reaction kinetics approach. The study was carried out on various variables including fermentation time (6 - 30 hours), hydrolysis temperature (80 - 90 oC), and substrate enzyme ratio (1: 1 - 1: 3). While the parameters to be tested are glucose levels and bioethanol levels. The optimal effect of the variable on alcohol content is obtained when the alcohol content value is more than 17.2% with an enzyme ratio of 3 - 3.5 at a temperature of 94 - 96 oC for 35 - 40 hours. From the research, it was found that it is possible to enlarge the reactor up to 200 times by using a ratio to obtain the ideal stirred tank reactor dimensions with a conversion of 97.15%.