Authors :
Hargono; Andreas Kevin Santoso; Aurellia Livia Hidayat; Auxensius Rexer Fransenda; Abram Hasiholan Marpaung; Steffanie Glory Sihombing
Volume/Issue :
Volume 8 - 2023, Issue 10 - October
Google Scholar :
https://tinyurl.com/2apy4b9n
Scribd :
https://tinyurl.com/28nhz3a2
DOI :
https://doi.org/10.5281/zenodo.10090855
Abstract :
This study focuses on the production of
bioethanol from rubber cassava starch using hydrolysis
and fermentation processes. The research includes the
impact of substrate concentration on the concentration
of reducing sugars in hydrolysis, the influence of mineral
ion concentrations of K+
and Mg2+ in the final
fermentation on bioethanol yield, the effect of substrate
concentration on bioethanol yield, and the influence of
the final fermentation time on bioethanol yield. The
results indicate that increasing substrate concentration
leads to higher concentrations of reducing sugars due to
more substrate molecules reacting with enzymes. Higher
concentrations of mineral ions K+ and Mg2+ during
fermentation also result in increased bioethanol yield, as
these ions enhance yeast cell growth and metabolism,
accelerating the fermentation process. Additionally,
higher substrate concentrations positively affect
bioethanol yield because more reducing sugars are
available for yeast cells to convert into ethanol. Longer
final fermentation times also increase bioethanol yield,
as they facilitate microorganism performance in
converting reducing sugars into bioethanol. However,
excessively prolonged fermentation times should be
avoided to prevent microbial cell death due to nutrient
depletion and carbon dioxide toxicity.
Keywords :
Bioethanol, Rubber Cassava, Mineral Ions, Alternative Energy, Starch.
This study focuses on the production of
bioethanol from rubber cassava starch using hydrolysis
and fermentation processes. The research includes the
impact of substrate concentration on the concentration
of reducing sugars in hydrolysis, the influence of mineral
ion concentrations of K+
and Mg2+ in the final
fermentation on bioethanol yield, the effect of substrate
concentration on bioethanol yield, and the influence of
the final fermentation time on bioethanol yield. The
results indicate that increasing substrate concentration
leads to higher concentrations of reducing sugars due to
more substrate molecules reacting with enzymes. Higher
concentrations of mineral ions K+ and Mg2+ during
fermentation also result in increased bioethanol yield, as
these ions enhance yeast cell growth and metabolism,
accelerating the fermentation process. Additionally,
higher substrate concentrations positively affect
bioethanol yield because more reducing sugars are
available for yeast cells to convert into ethanol. Longer
final fermentation times also increase bioethanol yield,
as they facilitate microorganism performance in
converting reducing sugars into bioethanol. However,
excessively prolonged fermentation times should be
avoided to prevent microbial cell death due to nutrient
depletion and carbon dioxide toxicity.
Keywords :
Bioethanol, Rubber Cassava, Mineral Ions, Alternative Energy, Starch.
