文献类型： 会议论文

第一作者： Widya Fatriasari

作者： Widya Fatriasari ¹ ; Euis Hermiati ¹ ; Nissa Nurfajrin Solihat ¹ ; Triyani Fajriutami ¹ ; Deddy Triyono Nugroho Adi ¹ ;

作者机构： 1.Research Center for Biomaterials, Indonesian Institute of Sciences (LIPI), Cibinong Science Center, Cibinong-Bogor 16911

关键词： kraft pulping;reducing sugar yield;sweet sorghum bagasse;variation active alkali and sufidity;lignin and hemicellulose removal

会议名称： International Symposium on Applied Chemistry

主办单位：

页码： 020012-1-020012-8

摘要： Kraft pulping of sweet sorghum bagasse (SSB) has been used for effective delignification method for cellulose production. This study was conducted to evaluate the performance pulp kraft of SSB for reducing sugar production. The study intended to investigate the effect of active alkali and sulfidity loading variation of SSB pulp kraft on reducing sugar yield per biomass. The SSB pulp was prepared after pulping using three variations of active alkali (17, 19, and 22%) and sulfidity loading (20, 22, and 24%) at 170℃ for 4 h with liquor to wood ratio of 10. A total of 9 pulps were obtained from these pretreatments. Delignification pretreatment has been succesfully removed lignin and hemicellulose more than 90% and 50%, respectively.Increasing active alkali and sulfidity loading has significantly increased lignin removal caused by disruption of the cell wall structure for releasing lignin into black liquor in the cellulose extraction. The enzymatic hydrolysisof pulp was carried out with cellulase loading of 40 FPUperg substrate in the shaking incubator at 50℃ and 150 rpm for 78 h. For each 24 h, the reducing sugar y ield (DNS assay) has been observed. Even though the lignin and hemicellulose loss occurred along with higher active alkali loading, this condition tends to decrease its yield. The reducing sugar concentration varied between 7-8 g/L. Increasing active alkali and sulfidity was significantly decreased the reducing sugar per biomass. Pulp delignified by 17% active alkali and 20% sulfidity has demonstrated the maximum reducing sugar yield per biomass of45.57% resulted after 72 h enzymatic hydrolysis. These results indicated that kraft pulpingwas success to degrade more lignin and hemicellulose content to facilitate the enzyme for breaking down the cellulose into its sugar monomer. A high loss of lignin and hemicellulose are not single factor to improve digestibility of SSB. This sugar has potential for yeast fermented into bioethanol.

分类号： o69-532