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Simultaneous saccharification and juice co-fermentation for high-titer ethanol production using sweet sorghum stalk
- Zhang, Changwei, Wen, Hao, Chen, Changjing, Cai, Di, Fu, Chaohui, Li, Ping, Qin, Peiyong, Tan, Tianwei
- Renewable energy 2019 v.134 pp. 44-53
- bagasse, biomass, endo-1,4-beta-glucanase, ethanol, ethanol production, fermentation, juices, renewable energy sources, saccharification, sorghum stalks, sulfuric acid, sweet sorghum
- The acid pretreated sweet sorghum bagasse was mixed with the fermentable juice for ethanol production by simultaneous saccharification and juice co-fermentation (SSJcF). The effect of sulfuric acid concentration on ethanol production was evaluated. Two-phase of fermentation was occurred distinctly during the process. Under the optimized conditions (2% of sulfuric acid and 20 FPU/g of cellulase added at 0 h), 120.41 ± 0.4 g/L of ethanol was achieved after 216 h of inoculation, with ethanol yield of 67.75 g/kg of the fresh sweet sorghum stalk (FSSS) that contained water and was rich in monosaccharide and cellulosic biomass. This study provided a potential way for high titer ethanol production by SSJcF using FFFS, which is benefited to the downstream ethanol separation processes.