In this work,the ethanol production from sweet sorghum residue was studied.Sweet sorghum res-idue was hydrolyzed with phosphoric acid under mild conditions.The liquid hydrolysate was fermented by Pachysolen tannophilu...In this work,the ethanol production from sweet sorghum residue was studied.Sweet sorghum res-idue was hydrolyzed with phosphoric acid under mild conditions.The liquid hydrolysate was fermented by Pachysolen tannophilus,and the hydrolysis residue was fermented by the simultaneous saccharification and fer-mentation(SSF)using Saecharomyces cerevisiae with cel-lulase(60 FPU/g dry materials).Orthogonal experiments were carried out to investigate the effects of main reaction condition factors,such as temperature,acid concentra-tion,time and dry-matter content,on the reducing sugar yield.The results show that the optimal reaction condi-tions should be 120℃,80 g/L,80 min and 10%,respect-ively.Under these conditions,0.3024 g reducing sugar/g dry material was obtained.The liquid hydrolysate was then fermented by P.tannophilus with the highest ethanol concentration of 14.5 g/L.At a water-insoluble solid con-centration of 5%,5.4 g/L ethanol was obtained after 12 h of SSF.The total ethanol yield was 0.147 g/g dry material,which would be beneficial for the application of ethanol production from sweet sorghum residue.展开更多
文摘In this work,the ethanol production from sweet sorghum residue was studied.Sweet sorghum res-idue was hydrolyzed with phosphoric acid under mild conditions.The liquid hydrolysate was fermented by Pachysolen tannophilus,and the hydrolysis residue was fermented by the simultaneous saccharification and fer-mentation(SSF)using Saecharomyces cerevisiae with cel-lulase(60 FPU/g dry materials).Orthogonal experiments were carried out to investigate the effects of main reaction condition factors,such as temperature,acid concentra-tion,time and dry-matter content,on the reducing sugar yield.The results show that the optimal reaction condi-tions should be 120℃,80 g/L,80 min and 10%,respect-ively.Under these conditions,0.3024 g reducing sugar/g dry material was obtained.The liquid hydrolysate was then fermented by P.tannophilus with the highest ethanol concentration of 14.5 g/L.At a water-insoluble solid con-centration of 5%,5.4 g/L ethanol was obtained after 12 h of SSF.The total ethanol yield was 0.147 g/g dry material,which would be beneficial for the application of ethanol production from sweet sorghum residue.
