Integrated Hydrolyzation and Fermentation of Sugar Beet Pulp to Bioethanol

분야
자연과학 > 생물
저자
( Ton I Rezi ) , ( Damir Oros ) , ( Iva Markovi ) , ( Daniel Kracher ) , ( Roland Ludwig ) , ( Bozidar Santek )
발행기관
한국미생물생명공학회(구 한국산업미생물학회)
간행물정보
Journal of Microbiology and Biotechnology 2013년, 제23권 제9호, 1244~1252페이지(총9페이지)
파일형식
05212348.pdf [무료 PDF 뷰어 다운로드]
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    영문초록
    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.
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