Consolidated bioprocess for bioethanol production with alkali-pretreated sugarcane bagasse

Yunyun Liu, Yu Zhang, Jingliang Xu, Yongming Sun, Zhenhong Yuan and Jun Xie

Applied Energy, 2015, vol. 157, issue C, 517-522

Abstract: A consolidated bioprocess integrating enzyme production, saccharification and fermentation was applied for bioethanol production. Mixed solid-state fermentation of alkali-pretreated sugarcane bagasse (SCB) supplemented with wheat bran (WB) to produce a compound enzyme for saccharification by Trichoderma and Penicillium was carried out, and at 72h, the obtained sugars concentration was 20.190g/L. Then the mixture was further converted to ethanol by inoculating Saccharomyces cerevisiae. After 24h, the maximum ethanol concentration 5.825g/L (40.84% of theoretical yield) was achieved. At 144h, the produced β-glucosidase activity and fungal biomass were 0.483IU/mL and 0.204g/g, respectively. The consolidated bioprocess avoided enzyme preparation, saved much water/energy consumption and reduced equipment investment, which indicated that it might be an effective approach for the economic production of bioethanol.

Keywords: Mixed culture; Solid state fermentation; Sugars; Enzymes; Simultaneous saccharification and fermentation; Bioethanol (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (7)

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DOI: 10.1016/j.apenergy.2015.05.004

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