GROWTH PROFILES AND ETHANOL PRODUCTION OF TWO YEAST STRAINS Kluyveromyces marxianus IFO-288 AND Kluyveromyces marxianus IFO-617 DURING FERMENTATION OF SOYBEAN PULP HYDROLYZATE SUBSTRATES

  • Kahar Muzakhar

Abstract

Two yeast strains, K.marxianus IFO-288 and K.marxianus IFO-617, were observed to utilize carbon andnitrogen sources obtained from enzymatically hydrolyzed soybean pulp (hydrolyzate). Under aerobiccondition where 1.5% hydrolyzate was used, the maximum biomass of the two yeast yield reached 30%with the protein contents of 47-53%. The two yeast strains also fermented the soybean pulp hydrolyzateand produced alcohol when anaerobic condition was set. The alcohol production effi ciencies of the K.marxianus IFO-288 and K. marxianus IFO-617were 49% and 59.7%, respectively in the medium containing1.5% hydrolyzate. These values were noticed to decrease for the two strains when the concentration of thehydrolyzate was increased. At the concentrations of 2.5% and 5% hydrolyzate for examples, the alcoholproduction effi ciencies of the K.marxianus IFO-288 became 42.5% and 18.5%, respectively, while 45.6% and20.8%, respectively were recorded in the medium inoculated with K. marxianus IFO-617. At 10% hydrolyzateconcentration, none of the yeast strains grew or produced alcohol, indicating that some inhibitory substancesin hydrolyzates were present in the fermentation medium.

Downloads

Download data is not yet available.
How to Cite
MUZAKHAR, Kahar. GROWTH PROFILES AND ETHANOL PRODUCTION OF TWO YEAST STRAINS Kluyveromyces marxianus IFO-288 AND Kluyveromyces marxianus IFO-617 DURING FERMENTATION OF SOYBEAN PULP HYDROLYZATE SUBSTRATES. International Journal of Biosciences and Biotechnology, [S.l.], v. 1, n. 2, july 2013. ISSN 2655-9994. Available at: <https://ojs.unud.ac.id/index.php/jbb/article/view/13613>. Date accessed: 29 mar. 2024.
Section
Articles

Keywords

biomass, alcohol, fermentation, hydrolyzate