Application of simultaneous saccharification and fermentation (SSF) from viscosity reducing of raw sweet potato for bioethanol production at laboratory, pilot and industrial scales

The aim of this work was to research a bioprocess for bioethanol production from raw sweet potato by Saccharomyces cerevisiae at laboratory, pilot and industrial scales. The fermentation mode, inoculum size and pressure from different gases were determined in laboratory. The maximum ethanol concentr...

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Bibliographic Details
Published in:Bioresource technology 2011-03, Vol.102 (6), p.4573-4579
Main Authors: Zhang, Liang, Zhao, Hai, Gan, Mingzhe, Jin, Yanlin, Gao, Xiaofeng, Chen, Qian, Guan, Jiafa, Wang, Zhongyan
Format: Article
Language:English
Subjects:
Bioethanol
Biofuel production
Biofuels - analysis
Biological and medical sciences
Biotechnology
Energy
Ethanol
Ethanol - analysis
Ethyl alcohol
Fermentation
Fundamental and applied biological sciences. Psychology
Hydrogen-Ion Concentration
Industrial applications and implications. Economical aspects
Industrial Microbiology - methods
Industry scale
Ipomoea batatas - metabolism
Laboratories
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
Pilot Projects
Pilots
Pressure
Raw
Saccharification
Saccharomyces cerevisiae
Saccharomyces cerevisiae - metabolism
Simultaneous saccharification and fermentation (SSF)
Solanum tuberosum
Sweet potato
Sweets
Viscosity
Viscosity reduction
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Summary:The aim of this work was to research a bioprocess for bioethanol production from raw sweet potato by Saccharomyces cerevisiae at laboratory, pilot and industrial scales. The fermentation mode, inoculum size and pressure from different gases were determined in laboratory. The maximum ethanol concentration, average ethanol productivity rate and yield of ethanol after fermentation in laboratory scale (128.51 g/L, 4.76 g/L/h and 91.4%) were satisfactory with small decrease at pilot scale (109.06 g/L, 4.89 g/L/h and 91.24%) and industrial scale (97.94 g/L, 4.19 g/L/h and 91.27%). When scaled up, the viscosity caused resistance to fermentation parameters, 1.56 AUG/g (sweet potato mash) of xylanase decreased the viscosity from approximately 30000 to 500 cp. Overall, sweet potato is a attractive feedstock for be bioethanol production from both the economic standpoints and environmentally friendly.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2010.12.115