Utilization Tofu Dregs As A Source Of Nitrogen In Fermentation Of Tuber Ganyong (Canna Edulis Kerr.) By Saccharomyces Cerevisiae

摘要

This study was combined of tofu dregs powder as a source of nutients with enzimatic to hyrolyzed tuber ganyong powder (Canna edulis Kerr.) in the ethanol fermetation process using Saccharomyces cerevisiae has been performed. This study also purpose to determine the concentration of tofu dregs powder and fermentation time was used to produce the optimum ethanol content. The enzymatic hydrolysis method carried out through liquification phase with α-amylase and saccharification phase with gluco-amylase. Furthermore the process of fermentation stage with the variation of the time (130 hours, 154 hours and 178 hours) using the Saccharomyces cerevisiae with the addition of tofu dregs powder as a nutrient at concentration variation (1 % (w/v), 2 % (w/v) and 3 % (w/v)). The results of the research, the highest ethanol content was found in the addition tofu dregs powder of 2 % (w/v) with fermentation time of 178 hours. The results of ethanol content obtained from density methods was 85 % and from gas chromatography methods was 84,451 %.