title: Application of simultaneous saccharification and fermentation (SSF) from viscosity reducing of raw sweet potato for bioethanol production at laboratory, pilot and industrial scales.
abstract: 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.
authors.affiliation: Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, PR China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Hai
authors.initials: H
authors.lastname: Zhao
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Gan
authors.forename: Yanlin
authors.initials: Y
authors.lastname: Jin
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Gao
authors.forename: Qian
authors.initials: Q
authors.lastname: Chen
authors.forename: Jiafa
authors.initials: J
authors.lastname: Guan
authors.forename: Zhongyan
authors.initials: Z
authors.lastname: Wang
mesh_terms: D056804:Biofuels / Q000032:analysis*; D000431:Ethanol / Q000032:analysis*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology / Q000379:methods*; D027723:Ipomoea batatas / Q000378:metabolism*; D007753:Laboratories; D010865:Pilot Projects; D011312:Pressure; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D014783:Viscosity
chemical_list: D056804:Biofuels; D000431:Ethanol