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Gewählte Publikation:

Rezic, T; Oros, D; Markovic, I; Kracher, D; Ludwig, R; Santek, B.
(2013): Integrated Hydrolyzation and Fermentation of Sugar Beet Pulp to Bioethanol
J MICROBIOL BIOTECHN. 2013; 23(9): 1244-1252. FullText FullText_BOKU

Abstract:
Sugar beet pulp is an abundant industrial waste material that holds a great potential for bioethanol production owing to its high content of cellulose, hemicelluloses, and pectin. Its structural and chemical robustness limits the yield of fermentable sugars obtained by hydrolyzation and represents the main bottleneck for bioethanol production. Physical (ultrasound and thermal) pretreatment methods were tested and combined with enzymatic hydrolysis by cellulase and pectinase to evaluate the most efficient strategy. The optimized hydrolysis process was combined with a fermentation step using a Saccharomyces cerevisiae strain for ethanol production in a single-tank bioreactor. Optimal sugar beet pulp conversion was achieved at a concentration of 60 g/l (39% of dry weight) and a bioreactor stirrer speed of 960 rpm. The maximum ethanol yield was 0.1 g ethanol/g of dry weight (0.25 g ethanol/g total sugar content), the efficiency of ethanol production was 49%, and the productivity of the bioprocess was 0.29 g/l.h, respectively.
Autor/innen der BOKU Wien:
Kracher Daniel
Ludwig Roland
Rezic Tonci
BOKU Gendermonitor:


Find related publications in this database (Keywords)
Sugar beet pulp
bioethanol
ultrasound pretreatment
thermal pretreatment
enzymatic hydrolysis
Saccharomyces cerevisiae


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