Pengaruh Variasi Penambahan Ragi dan Lamanya Waktu Fermentasi Terhadap Hasil Fermentasi Etanol dari Serbuk Gergajian Kayu Ulin (Eusideroxylon zwageri T et B)
Abstract: The research was
aimed to assess the influence of different levels of yeast addition and
duration of fermentation on the amount and percentage of ethanol produced from
sawdust of ulin wood as raw material.
Method used in this experiment was chemical hydrolysis of cellulose by
using nitric acid (HNO3) as chemical agent. This substrate was inoculated into
yeast cell (khamir) to convert glucose into ethanol. The amount of ethanol (ml)
was obtained from distilled water (ml) multiplied by the azeotropic value of
ethanol (95,5%), while the value ethanol
(%) obtained was from the amount of ethanol (ml) divided by the amount of
distilled water (ml) multiplied by 100 percent.
The study used a factorial design of 3 x 3 with 3 replications and the
parameters used were A factor (amount of yeast) consisting of 5, 10, and 15
grams, respectively, and B factor (duration of fermentation) consisting of 1,
3, and 5 days, respectively. Significant differences of ANOVA at test levels of
5% and 1% will be continued by interaction test between the two factors to
assess the influence of each factor on the amount and percentage of ethanol.
Results indicated that the amount of yeast applied, duration of
fermentation and interaction between the two gave very significant effects on the
amount of ethanol (ml) and its percentage (%). Following the treatment on ulin
wood sawdust, the lowest yield of ethanol was found at A1B1 treatment (5 g, 1
day) with. 1.69 ml, while the highest at A3B3 treatment (15 g, 5 day) with 5.19
ml. In terms of ethanol percentage, the lowest was found at A1B1 treatment with
9.4% and the highest at A3B2 treatment with 29.9%.
Keywords: Eusideroxylon
zwageri T et B, fermentation period, yeast addition, ethanol production
Penulis: Ahmad Jauhari, Noor
Mirad Sari
Kode Jurnal: jpkehutanandd070003
