Utilization of Pitted Dates for the Production of Highly Concentrated Fructose Syrups by S. Cerevisiae

Journal Article

Zeinelabdeen, Meilana Dharma Putra, Ahmed E. Abasaeed, Emad M. Ali*, Ashraf K. Sulieman, Mohamed H. Gaily, Mohamed A. . 2014

• المجلة \ الصحيفة: CHEMICAL ENGINEERING TRANSACTIONS
• الصفحات: 397-402

مستخلص المنشور

Dates contain over 75 % reduced sugars in form of glucose and fructose. Saccharomyces cerevisiae strain
ATCC 36858 has been used to selectively ferment the glucose component in the date syrup into ethanol.
Separation of ethanol from the fermentation resulted in higher fructose concentrations. The selective
fermentation was performed at three temperatures, i.e., 27, 30 and 33 °C at agitation speed of 120 rpm
and initial syrup concentration of 15 % (150 g/L). The fructose fractions in the remaining sugar solution
were 97.5, 99.2 and 97.8 % for fermentation temperatures of 27, 30 and 33 °C respectively. The
corresponding fructose yields were 82.1, 95.1 and 85.7 %. However, for the wild non-selective strain all
fructose was fermented simultaneously with the glucose component. The fructose fractions obtained here
are much higher than those obtained with the classical isomerization processes that yield 55 % fructose
syrups.